PurePoint Energy

New Building-Integrated PV: Solar Windows

2011-08-15T11:44:00.000-07:00

Skyscrapers like Chicago’s Willis Tower consume huge amounts of energy but have so far been unable to install solar panels because of the comparably small amount of roof space they have. However, solar technology company Pythagoras Solar has now found a way of using the massive amount of sunlight that hits the tall building walls every day.

Pythagoras’s new solar windows are now being tested on a few buildings, including the Willis Tower. The product is the world’s first transparent photovoltaic glass unit, and is used in place of regular windows, which do nothing to offset energy use. The typical window is also a huge burden in the summer; all offices want natural lighting, but that invites more heat for which we then need more air conditioning. The solar window allows light to come in, but can also use it to generate electricity, all in the same product. The panel, like traditional solar panels, still has grids on it, but they resemble a set of open venetian blinds. Other than that, it is also clear, just like an ordinary window. Its silicon PV cells sit between two panes of glass.

Pythagoras Solar’s new product combines the ideas behind self-tinting windows and thin film solar windows, which also tried to control the amount of light let in and generate power. The added aesthetic value of not actually looking like solar panels makes the product more attractive to architects and homeowners, as well. Prices have not been revealed yet, so interested residential customers may have to wait to install them. However, Founder and CEO Gonen Fink estimates that the typical consumer will recoup the cost of the windows after three to five years.

The unit, which has already won GE’s Ecomagination Challenge, joins other BIPV products like solar shingles and solar façade modules in using buildings themselves to generate energy.

With SB1 passed, what has been implemented? Great incentives for CT!

2011-08-10T09:10:00.001-07:00

The Clean Energy Finance and Investment Authority (CEFIA) is going to be offering a residential solar incentive program which aims to build at least 30 megawatts of solar by 2023. A third of their funds, which is $10 million dollars a year, will now be used toward this new program. CEFIA can structure this incentive in two ways, as an upfront rebate or as performance-based incentives. As funding diminishes over time, so must the incentives and CEFIA plans to keep us updated on the status of their budget via their website.

Taking effect on January 1, 2012 the electric utilities must solicit 15 year contracts with developers for zero-emission Class I renewable energy credits for non-emitting Class I renewable energy technologies such as wind, solar, and micro-hydropower. The budget for this program starts at $8 million per year and will go up to $48 million a year by 2018. These projects must be customer-sited and less than 1 megawatt in size. This project will make it possible for municipalities to install far more solar power than ever before on town buildings and schools, and will be benefit those interested in powering town facilities with wind.

A reform has also been made to the CT Energy Efficiency Fund. The electric and natural gas utilities have been removed as voting members of the Efficiency Fund board, although they are still kept as paid program administrators. The Department of Energy and Environmental Protection’s commissioner/designee is now the chair of the Efficiency Fund’s board. This change in the CT Energy Efficiency Fund board will allow the fund to be more transparent and responsive to outside input.

Speak Your Mind—That’s Wind Power |EMagazine.com

2011-08-10T07:19:00.000-07:00

Speak Your Mind—That’s Wind Power EMagazine.com

Let the Sun Shine On Your Face & Power Your Bike While Going For a Ride!

2011-08-03T08:32:00.000-07:00

Electric bikes are already a greener way to get around, getting riders about 1,000 miles per gas gallon, but what about riding an electric bike powered by solar energy?! This trend has been gaining popularity in recent years. There are different ways to go about using solar energy to power your electric bike. You can either use a mounted solar panel from your house and/or work to charge the bike’s battery, or mount a solar panel to the bike itself. Electric bikes are actually pretty powerful, requiring 200-500 watts of energy to be stored in their batteries in order to travel a desirable range. Although they may be less efficient than normal solar panels, roll-up solar panels are an easier and more transportable way to acquire solar energy for your electric bike. These roll-up solar panels can come with 25-75 watts of output, they can be put out on your bike while riding, and rolled up to be stored away once you reach your destination. An even newer and upcoming way of traveling on solar energy is the solar electric bike that has photovoltaic panels built in to its wheels! I’ve provided a picture with this blog post to show how unique this bike looks! This particular bike is called the E-V Sunny Bicycle and can go up to 19 mph from its 500 watt motor. It may be a little pricey, but it sure looks cool! The company who made this bike called it the “first of all solar electric bicycles driven completely from power derived from the sun’s rays”! Would you consider a solar electric bicycle to replace your gas guzzling car??

PurePoint Energy is attending the CT Farm Energy Fair & so should you!!

2011-07-13T09:47:00.000-07:00

We will also be giving a presentation between 5-6pm during this event! Don't miss it!

U.S. Solar Market Trends of 2010

2011-07-11T08:50:00.000-07:00

While 2008's Great Recession put a damper on the solar market in 2009, steady growth since then meant a boost for the solar market in 2010. This boom, expected to carry into this year, was facilitated by increased capital through recovery after the economic meltdown, in conjunction with financial stimulus and higher consumer demand.

The U.S. Treasury Grant, for example, was enacted by Congress in early 2009 as part of the stimulus package. The program gives the option of a cash grant for installations-this in lieu of Investment Tax Credit, which was a weaker incentive for consumers. The Treasury cash program, which was originally meant to expire at the end of 2010, was later renewed for 2011. It provided $410 million, funding about 40% of non-residential PV installations in 2010, the tax credit levels of which are set to continue until 2016 (cash grants are up for renewal on a yearly basis). Many federal and state government solar installations were also funded by ARRA, while capital markets recovery for 2010 contributed to the growth of non-residential solar installations by 63%. Prices for PV modules decreased as well, by between 14 and 20 percent, providing a stimulus for areas without local policies already; however, financial incentives will continue to determine where the most solar installations are happening.

The number of installations in the residential sector in particular has grown a lot in the past decade. It increased by 64% and accounted for 91% of the grid-connected PV installations in 2010, but only 29% of the capacity; non-residential systems are, on average, ten times as big as residential ones. The overall PV capacity installed in 2010 doubled compared with 2009 and was over eight times the capacity of PV installations in 2006.

California stayed the state with the most installations, largely thanks to a 10 year, $3 billion program called "Go Solar California" that started in 2007. The state also has a steadily increasing RPS requirement mandating that a certain fraction of the electricity supply be provided by renewable energy. It is planning for 20% by 2013, and 33% by 2020 (Connecticut will be requiring 27% by 2020). In contrast, states like Kentucky with no solar RPS policy or few incentives also have relatively few installations.

In 2011, analysts expect there to be continued growth for the solar market, especially for grid-connected PV systems. Installations doubled in nine states, and will spread to more. As in the past, growth for this market will be predominantly determined by federal and state incentives.

Click here for the entire report and additional information.

Recent Research Confirms That Homes With Solar Sell For More!

2011-07-01T07:55:00.000-07:00

Lawrence Berkley National Laboratory in California has conducted a study comparing 2,000 homes equipped with photovoltaics to comparable homes without solar. The Lawrence Berkley lab is supported by the U.S. Department of Energy and was conducted by the renewable energy research group, which conducts public-interest studies on renewables, including policies, costs and financing.

Their research suggests that a house with a 5 kW solar system sells for $19,500 to $32,000 more than comparable homes without solar systems. This is useful and hopeful information for those looking to invest money into PV systems and are worried about being in their homes long enough to earn back the money that they put into their solar investment. This study also found that new homes with PV systems had a lower premium than existing homes, $2.30 to $2.60 per W compared to over $6 per W value.

This study proves that there can be great financial benefit in more ways that just one when you invest in solar, however local market conditions do vary from state to state. Electricity prices and installation prices do affect the financial benefit of solar, so the next step to take is to apply this study to other states and see if the results coincide with those from California. Overall, the results of this study are very positive for the solar industry. Not only do solar consumers save on their electricity bills, but they can see money coming back to them if they decide to sell their homes.

Are PV trackers worth the extra expense? Once thought not, but times are changing.

2011-06-20T09:15:00.000-07:00

To determine whether it is more beneficial to consumers to install regular modules in order to boost site production or to install a tracker it is important to look at the geography of the project at hand. Depending on how much solar radiation an area receives or how much space you have to install the modules will make or break your decision to go with trackers. If you are located in an area with lower levels of solar radiation installing a tracker may not be as beneficial compared to areas that receive more sunlight. However, if you are limited on space for a project, a tracker would be a more efficient way of receiving solar energy. Trackers are also beneficial when working with problematic terrain.

According to Frank A. Middleton, vice president of marketing and chief operating officer at OPEL Solar Inc. based in Shelton, CT choosing to install trackers is typically expected to increase the costs of a project by 4-5%. Middleton believes that the yield increases, which usually reach up to 15-20%, justify the use of trackers for nearly all PV projects. 20 years ago due to the lack of technology that we now have trackers were known to be unreliable, but now with GPS chips trackers require so much less maintenance. The belief that trackers have higher costs than fixed systems is now virtually gone, and in the end you are producing more energy which would make up for any of the equipment that is slightly more expensive.

Today’s trackers follow the sun by using one of two technologies, according to Middleton. The first uses astronomic tracking algorithms, which is tracking the sun by using mathematical equations to determine exactly where it is at all times, while the second is searching for the brightest spot in the sky and adjusting for clouds, reflections from objects, and is more difficult. The first seems to be the preferred technology among many. With new technologies we are now able to track and control our trackers wirelessly! Maintenance, problem solving, and monitoring can all be performed remotely with this new network.

Of course every project is different and it depends on many factors what the best option is for your installation. Taking all these factors into account can help to determine whether it is beneficial to choose trackers versus fixed modules. Trackers, once thought to be too expensive and a hassle, is finally gaining acceptance in the industry as technologies are improving and being perfected.

SB1: An act concerning Connecticut’s energy future. A bright future for CT!

2011-06-13T09:18:00.000-07:00

With the vote from the state Senate being 36-0, all Democrats and Republicans agreed, SB1, supported by Governor Malloy, was finally passed last Tuesday, June 7, 2011. The bill will become effective on July 1, 2011. The general statutes of SB1 are amended to establish policies, programs and procedures to reduce electricity costs, promote renewable energy, and create financing mechanisms for energy improvements that Connecticut has been in need of.

From 2008 to 2010 Connecticut fell from 8th to 18th in the nation for solar power installations. Kind of pathetic considering that at its peak Connecticut was in the top three! Luckily, its been realized that action must be taken to change this! The solar provisions made in this bill are to help Connecticut move back towards renewable energy sources. Connecticut is losing in the race against other states in providing clean energy and losing business to its surrounding states, such as New Jersey and Massachusetts.

With SB1 being passed, there is now a greater hope for expanding Connecticut’s future in renewable energy. For Connecticut ratepayers SB1 means reduced rates and decreases in costs, and the creation of what is called a “Green Bank”. The new funding model of the “Green Bank” allows for leveraging the ratepayer fees the fund already gets, private capital and other money. The legislation also dramatically expands the fund's purview beyond the solar rebate and other limited clean energy projects to include things like electric and natural gas infrastructure projects. Among the provisions is the commercial solar program to become part of a renewable energy credit system that includes other types of zero-emission energy sources and utilities are required to buy energy from them through long-term contracts. Municipalities may establish a Property Assessed Clean Energy, or PACE, program to do energy efficiency and renewable energy work that is repaid through an assessment on property taxes. This also authorizes municipalities to do energy retrofits through performance contracts that use the money from energy savings to pay for the work. The provisions set forth for this bill are in the best interest for the consumer and for the government in a desperately needed movement towards renewable energy sources.

Economic Benefits of Commercial Buildings Using Solar Power

2011-06-08T13:07:00.000-07:00

In the past, commercial building owners had to pay large upfront sums of money to install solar arrays and it was not economically viable for most people. However, solar power has become much more affordable for commercial buildings due to the Connecticut Clean Energy Fund. They are offering a DG grant for commercial buildings, which will award $2.00 per watt up to a 100 kW system and $1.25 per watt beyond that. This will reduce the price by nearly a third!

An average 30 kW system size could produce approximately $6,000 worth of electricity in the first year. The electric savings combined with the DG grant and tax incentives could produce a payback in 5 years or less. In other words, it will take 5 years or less until the savings equal the cost. Beyond that, the solar panels will result in raw savings especially since electricity costs average an increase of 5% each year.

In addition to cutting down utility costs, solar panels increase property value tremendously. According to a study published in The Appraisal Journal, a property’s value is increased by $20 for every $1 reduction in energy costs. On top of that, the US Department of Energy’s renewable energy office has found that property with solar panels will sell twice as fast as property without solar panels. There are various renovations that commercial property owners could make in order to save money, but it’s hard to argue that solar power isn’t the top priority.

2011-04-27T08:34:00.001-07:00

Insuring your Solar Panels

When deciding whether to go solar, insurance is sometimes not the first thing on someone’s mind. However you will be reassured to know that unlike the scare stories of customers once being punished for going green, it is now very straight forward*.

Residential properties: For roof mounted systems an installation attached to a property would be included under any existing dwelling coverage policies. The new installation however should be declared to the insurance company and may require the coverage amount to be raised to cover the value of the new installation.

Ground mounted residential systems would also be covered within the residential policy under ‘Other Structures’ (usually 10% of the main dwelling cost). As above, an insurance company should be notified about the installation, to ensure the Property cover is suitable to include the new installation. Wind turbines, not attached to a house would also fall within this classification.

Commercial Properties: Like any building owned by a company, solar installations would be classed as building property and therefore covered under existing commercial insurance policies. All Solar PV systems should be declared, and coverage increased to incorporate the value of the new installation.

* This blog contains only general information, and should be used as reference only. PurePoint Energy encourages anyone considering solar PV to contact their own insurance company for specific details before completing any installation.

PurePoint Energy UGE Training

2011-04-27T08:32:00.001-07:00

PurePoint Energy's Team visited the Big Apple on Monday to attend the Urban Green Energy distributor training session. UGE was ready and able to answer all the questions we had regarding their products and to discuss in detail their product line including the new Sanya Hybrid Street Lamp. Along with other distributors from across the country, we were able to get hands on experience with assembling the Eddy 600 watt wind turbine. Their other turbine sizes include the 1kW Eddy GT, and 4kW UGE-4k which are all available through PurePoint Energy, a certified Urban Green Energy distributor.

Part 4: Costs of Owning Solar Panels; What You Should Expect

2011-02-28T06:48:00.000-08:00

What's New with Renewable Energy? Part 4

One great aspect of solar panels is that they don't require much maintenance. A lack of moving parts can be credited for the generally low maintenance costs along with well made materials. Lets talk about some costs that a solar panel owner may run into. On the lower end of the scale there are items such as wiring, nuts, bolts, frames etc. that may need replacement or repair over the panel’s lifetime. Items that may need to be replaced before the end of the panel’s lifetime that is more on the expensive side are the inverters. The two types of inverters are central inverters and micro inverters. Central inverters are usually located in a central area where the panels, which are wired in a series, are connected and the power is converted from DC to AC. They usually come with a 10 year warranty.

Micro inverters are located on the back of each solar panel where the conversion takes place. If one panel is not producing power, lets say because of an obstruction, the rest of the panels can still function independently where as with a central inverter if one panel is not working, the rest will most likely be effected as well due to their series setup. The micro inverters usually have a 15 year warranty. The downside to the micro type is they are more expensive and there is a chance multiple inverters may need maintenance or replacement where as central inverters would only have one. The price of replacing an inverter can range from approximately $1200-$2000. Other than the parts mentioned there is little to no possible cost, making solar panels an even more appealing investment.

Maintaining Your Solar Investment (Part 3)

2011-02-14T07:59:00.001-08:00

Can a Homeowner Maintain a Solar System?

There's one question that every homeowner looking to make a long term investment in solar power will be asking. Can I maintain what I'm buying? To people who are not familiar with solar systems the technical jargon and futuristic appearance may be slightly intimidating. But in reality you, as homeowner, will have little to worry about once everything is installed. After finding a qualified installer the next step is maintaining your investment. What's great about solar systems is that they are built to last. They are made to withstand harsh conditions and have no moving parts. So your only task is to allow the panels to keep producing electricity. In order to do that you need to keep them clean and free from any obstructions that can block the all important sun. In most cases you will only need to rinse down the panels a few times a year. If you live in an area that doesn't recieve much rain this may need to be done more frequently. In our February 4th article "Cleaning your Solar Panels" we give you the list of tools and strategies you may need to keep your panels performing at their best.

A service contract can usually be purchased along with your solar panel purchase although it may not be necessary depending on your ability to DIY. Most solar panels systems come with a warranty from 5-10yrs, so within that time span any issues that may arise with be fixed. However basic up keep is very minmum and can easily be done by the homeowner. If an issue does come about after the warranty, there are companies that can be hired to come and fix it. Other than cleaning, inspections should be done by the owner to look for hanging wires, animal nests or anything else out of the ordinary. (PurePoint Energy offers maintenance as well as installation for both ground mounted and roof mounted systems.)

(picture from- http://www.brockbuildersinc.com/422/residential-solar-panels-save-money-and-energy/)

2011-02-07T07:46:00.000-08:00

Ground Mount Vs. Roof Mount

So you decided to invest in solar panels for your home, and why wouldn't you its a great way to save money and do your part to help the environment simultaneously. You have a good grasp of the technology used and how it all works but now its time to decide where your going to put them. When most people think of solar panels they automatically picture them on roofs. But what they don't realize is that there are also ground mounted systems, each having their own pros and cons.

Their are a few things that need to be looked at in if a roof mounted system is what you have in mind. The first and probably most important aspect that needs to be taken into consideration is, whether your roof will allow your panels to have the optimal southern sun exposure while also not being obstructed by shade form other nearby objects like buildings or trees. Also does your roof provide enough space for the solar panels. A 1000 watt system may need 100 – 200 square feet of area, depending on the type of PV module. If you did the measurements and your thinking your roof has the square footage needed, keep in mind the design of your roof as well as any extras it may have (chimney, sky lights etc.) that can potentially affect the amount of usable space and cost of your system. Now if everything checks out and your roof is suitable for a roof mounted PV system then you can now move on to the next step, but if you find that it isn't or the cost is too high given the above conditions (or lack there of) a ground mounted system may be your future.

(image:http://kissmyface.typepad.com/photos/green_power/sun-powering-our-solar-panels.html)

Ground mounted systems make panel orientation much easier because they can be built to face any direction to maximize sun exposure. Cooler temperatures are ideal for solar panel use. If you have the space for a ground mounted setup air flow is much greater under the panels in comparison to their roof counter parts so there is a slight performance increase, although not significant. It does take more materials to build a ground system because it needs a place to be mounted and the wiring needs to be trenched to connect the panel(s) to the house.

Lets review the pros cons:

Roof-Mounted

Pros :

Depending on the pitch and orientation of your roof, it may be possible to install the solar panels out of view.
Beyond standard equipment, rooftop solar energy systems typically don’t require a lot of additional racking and other mounting hardware that's needed for ground-mounted systems.
Solar roofs make productive use of space that would otherwise go unused, as noted above.
Related to the previous point, solar roofs don’t eat up land that could otherwise be productively put to use. This consideration is particularly important when it comes to larger commercial and utility-scale projects, which can take up multiple football fields’ worth of space.

Cons:

Shade, from trees or nearby buildings, can be a real problem.
Sometimes a roof is too small to accommodate enough solar panels to suit the family’s energy needs.
Roofs with lots of contours or other funky shapes can see increase costs associated with solar energy system design and installation. In the worst case, oddly shaped roofs don’t have enough uninterrupted area to accommodate the panels.
It can be a bit more expensive to install solar panels on some kinds of roofs (like clay tile and wood shake shingle roofs) than it is on others (asphalt shingle).
It can be kind of a pain to clean/rinse off the panels. Usually a rain shower does the trick. But if you live in a low-rainfall area that gets a lot of dust, this may be a consideration.

Ground-Mounted

Pros :

It’s relatively easy to optimize the placement of the solar panels in order to maximize their electricity output. Unlike a roof -- the pitch and orientation of which is already set -- a ground-mounted array can be built so that it captures the most sunlight possible throughout the year.
While unusual for residential projects, it’s possible to install a tracking system with a ground-mounted system. (Note, too, that tracking systems increase the cost of solar installation.)
Solar panels perform best in cooler temperatures. More air tends to circulate behind the solar panels of a ground-mounted array than those of a rooftop system. Because ground-mounted panels manage to stay cooler, they often outperform their solar roof counterpart. (The difference in performance, however, is admittedly not that noticeable.)

Cons:

Ground-mounted solar systems typically require additional racking and mounting equipment, which can increase the cost of solar installation.
There may not be enough usable room on your property to accommodate a ground-mounted solar energy system.
It may not be possible to find an inconspicuous area to install the solar panels on your property, which may prompt aesthetic objections by you (or your family members). Usually, however, a solar installer can work with you to design an array that addresses these concerns.
Ground-mounted solar energy systems may come with added costs for trenching. “Trenching” means digging a trench to bury the electrical wiring that runs from the solar panels to your home. If you live in an area with really rocky soil, or there would be a long distance between the solar panels and your home, the added costs for trenching and burying conduit could be substantial.

(getsolar.com)

Maintaining Your Solar Investment

2011-02-07T06:17:00.000-08:00

Part 1
Cleaning Your Solar Panels:

One obvious yet often overlooked cause of a decline in the efficiency of your solar panel is the presence of dirt. Depending on your location, pollen, sand and other debris could be the culprit. When dirt accumulates on the solar panels it decreases the amount of solar radiation available for use, so in order to get the most out of your solar panels, frequent inspection and cleaning should be done. Tilted panels can be cleaned less often dueto rain runoff, a benefit flat panels do not have.

Photo courtesy of naturalturn at Flickr.com

Tools You’ll Need: Ladder, Warm Water, Soft Rags, Dish Washing Soap or Chemical Free Cleaners.

Warm water can initially be used to remove the majority of the dirt. If there are still spots on the panel a combination of water and dish soap or natural cleaners can be used along with a soft rag to gently wipe away the remaining debris.

Other options include auto cleaning systems which make it easier to keep panels clean in harder to reach areas. One obvious yet often overlooked cause of a decline in the efficiency of your solar panel is the presence of dirt. Depending on your location, pollen, sand and other debris could be the culprit. When dirt accumulates on the solar panels it decreases the amount of solar radiation available for use, so in order to get the most out of your solar panels, frequent inspection and cleaning should be done. Tilted panels can be cleaned less often due to rain runoff, a benefit flat panels do not have.

Google Proves the Benefits of Cleaning Your Solar PanelsGoogle’s headquarters located in Mountain View, CA has the largest corporate installation of solar panels in the United States with a 1.6 megawatt system. They decided to do an experiment to find out how much dirt actually affected their solar panel’s efficiency. The study began by comparing the two different sets of solar panels in Google campus - the flat ones in carports and the tilted ones on roofs. Understandably, dirt accumulates on top of the flat panels, while rain washes away most dirt atop the tilted ones, leaving some accumulation in the corners. A full 15 months after installation of the panels, the Google crew cleaned them up as part of this study. For the flat panels, the result was astounding -energy output doubled overnight. For the tilted panels though, the difference in output is "relatively" small. After this first experiment, the Google crew waited another eight months and cleaned the panels again, with the flat panels exhibiting in a 36 percent improvement in efficiency. Taking these results into account, the Google crew decided to clean the flat panels regularly, leaving the tilted ones out because the difference in output is negligible.

Rains Cleaning Affects:

Tilted solar panels

-Visual inspection indicates that rain does
clean them quite well.
-However, dirt does accumulate in the

bottom most corner of the solar panels

Non-tilted solar panels

-Rain does not clean dirt off horizontal,

non-tilted solar panels.

-Rain, mixed in with dirt that had settled on

the solar panels, does not drain well due

to the solar panel’s frame structure.

-3 millimeter depth between the solar

module metal frame and the glass surface

where dirty water can accumulate

B47 Parking and B45 Parking PV 0utput doubled after B45 Parking & B47 Parking solar panels were cleaned for the first time in 15 months represented by their peaks on between 8/11/2008 to 9/11/2008

Output increased by 36% after these solar panels were cleaned again 8 months later represented by their spikes in after 5/11/2009.

Next Week in Part Two Of the Series We Will Look at Ground Mount Vs. Roof Mount What's the Best Choice for Your Project?

Congress Extends Treasury Grant Program for Renewable Energy Projects

2010-12-17T12:07:00.000-08:00

Last night, the U.S. House of Representatives passed a comprehensive tax bill that included a one year extension of the Treasury's Section 1603 cash-grant program. The grant covers 30% of a renewable energy project cost. For more information on the bill and its implications, please visit here

Visit PurePoint Energy to find out more information on your future renewable energy project and see how you can take advantage of this latest grant program.

A Solar Reference: Tilt and Direction

2010-12-14T15:36:00.001-08:00

How Does The Orientation of my Roof Affect Solar Production?

Two important factors that can determine the efficiency of your solar energy system is the tilt (angle of the panels) and the orientation (direction – north, south, east or west). To make sure that you’re getting the most out of your panels, they need to be pointed in the direction that captures the most sunlight. Solar panels should always be faced south, unless you are in the southern hemisphere where they need to be faced north. The solar panel tilt varies depending on location.

Below is a Graph that shows the Efficiency of a Solar Panel at differing Orientations:

A Perfect World:
The green arrow points to the center part of the chart which is 100% insolation. If you follow the grey line to the left you can see that at 100% insolation there is a 35 degree tilt. Additionally, if you follow the line down you will see a direction of 180 degrees (true south). After looking at this chart you can see that in Bridgeport, Connecticut you would need a 35 degree tilt and a roof facing true south to get the most out of your solar panels.

In An Imperfect World:

Most roofs are not perfectly positioned for solar panels. They don't have to be perfect to benefit from solar energy. Typically anything above an 80% Tilt-Orientation factor is good.

For example, If you live in Bridgeport, Ct and you only have a 15° tilt on your roof and it faces South Southeast you can still reach a 95% Tilt-Orientation factor.

Questions? Contact PurePoint Energy for your solar needs. www.purepointenergy.com

PurePoint Energy Receives the Green Coast Award

2010-11-29T08:41:00.001-08:00

The Green Coast Awards honors and recognizes individuals, businesses, services, and organizations throughout Fairfield County that are socially and environmentally responsible, promote sustainability, have high ethical standards, and make conscious decisions everyday to improve our communities and the health of our planet. This year PurePoint Energy received the Green Coast Award on November 17th for being a leader in renewable energy. PurePoint Energy was recognized based upon their proven record of dedication to sustainable actions and innovation, their commitment to sustainability found in their mission statement and company goals, and by being approved by the Green Coast Awards Advisory Board.

In the past year PurePoint Energy completed 7 projects in which they helped residences and businesses cut costs on their electric bill, while using renewable energy. PurePoint Energy installed 3 commercial projects and 4 residential projects consisting of over 55 kW, which is roughly equivalent to planting 186 trees and driving 82,500 miles. PurePoint Energy has also helped make renewable energy solutions more affordable for their clients, by assisting clients in applying and receiving state and federal incentives.

For more information on how you can switch to renewable energy and reduce your energy costs, visit www.PurePointEnergy.com.

Agriculture and Solar Energy

2010-11-18T11:12:00.000-08:00

Solar energy has been around for thousands of years. The earliest forms of solar energy consisted of people using the sun to dry crops and grains. They would spread grain and fruit out in the sun after harvesting in order to dry the crops. The only problem to this method was that the crops were being subjected to damage by birds, rodents, wind, rain and contamination by windblown dust and dirt.

Solar Dryers

The simplest form of Solar Energy are Solar dryers, which consist of a shed or an enclosure, screened drying trays or racks, and a solar collector. The southern side of the enclosure is usually glazed which allows sunlight to dry the material. The interior of the enclosure is dark colored in order to absorb solar energy that will heat the air. The air heated in the solar collector moves up through the material being dried either by natural convection, or is fan forced. There are very few solar dryers in the U.S due to the high cost. If the collectors were designed to be used at another time of the year, like to heat buildings, solar dryers would be more cost-effective and common.

Solar Heaters& Solar Water heaters

Livestock must be enclosed in temperature and air quality controlled buildings in an effort to promote animal health and growth. The air inside these controlled buildings must be changed regularly to remove moisture, toxic gases, odors and dust. Solar air heaters can also be used to supplement natural ventilation during summer months. Heated water can account for up to 40% of the energy used on a dairy farm. Solar water Heating Systems are very cost-effective. They can heat water as well as provide water for cleaning, which will help reduce utility costs.

Solar Greenhouses

Greenhouses are dependent on the sun to supply their lighting necessities. However, they do not rely on the sun for heat, but rather gas and oil heaters to maintain the necessary temperature during the colder months. Solar Greenhouses on the other hand depend on the sun to supply light as well as heat to maintain the necessary brightness and temperature. The greenhouses are positioned so that the southern side is glazed, receiving maximum exposure and the northern side has little to no glaze and is insulated. Greenhouses have enough thermal mass that it can collect and store enough solar heat energy and insulation, that it retains enough heat to be used on rainy and cloudy days.

Photovoltaic Systems

Photovoltaic or Solar electric systems convert sunlight to electricity by using solar panels. On cloudy days PV systems can produce up to 80% of their potential energy. Potential consumers tend to worry about their solar panels being damaged, but there is no need to worry, being that designers test panels for hail impact, high wind, and freeze-thaw cycles representing year- round weather conditions. Professional installation and service is often included in the purchase price. PV systems maintenance is limited to visual checks and servicing batteries. PV systems are in fact very safe. They do not contain high voltages and they are not hazardous.

PV Water Pumping

PV Water pumping is one of the most cost-effective water pumping option, and is easy to install. It is most used in remote areas where there is no existing power line. PV water pumping is very cost-effective for remote livestock water supply, pond aeration, and small irrigation systems. The Solar water pumps work only when the sun is shining, mostly during the summer months, and water is stored in tanks to be used throughout the year. When it comes to supplying water to remote pastures, PV water pumping is the most cost effective system, and requires the least maintenance.

Is There A Future In Solar Energy?

2010-10-29T14:13:00.000-07:00

Is There A Future In Solar Energy?

Solar technology has been helping people create and save energy, while being eco-friendly for decades. In 1918, Polish Scientist Jan Czochralski developed a method to produce monocrystalline silicon, the material that is most commonly used in solar panels today. In 1963, Sharp Corporation was successful in developing the first silicon cell based solar module. Companies competed world-wide to develop the most efficient photovoltaic systems. Japan built a 242 watt module field in 1963, which was the largest at the time, only to be topped by the Americans 470 watt photovoltaic field in the Nimbus space project in 1964. Today solar energy continues to grow and efficiency is higher than ever, but in recent years only minor incremental improvements have been made towards silicon-based solar cells. Due to the so-called “peak” of silcon-based solar cell innovation, scientists are looking for new, low-cost, efficient methods of producing photovoltaic systems.

Quantum Dot Solar Cells

Pros:

§ Able to convert sunlight as well as use heat to produce electricity.

§ Clean power generation

§ Can possibly approach efficiencies of 65%.

Cons:

§ Hot electrons lose their energy as they travel.

§ Not Suitable for large scale manufacturing.

Overview: Research is still being done on quantum dot solar cells (QD), but they have been found to be very efficient. Once researchers are able to figure out how to consistently harness the majority of the suns light, quantum dot solar cells may be able to be implemented to solar modules. Right now QD solar cells are not able to be manufactured on a large scale, so implementing QD solar cells would have an insignificant impact.

Links:

§ Boosting Solar-Cell Efficiency With Quantum –Dot-Based Nanotechnology

§ New Inexpensive Solar Cell Design

§ Quantum Dot Research Could Mean Highly Efficient Solar Cells

Full Spectrum Solar Cells

Pros:

§ Able to convert the full solar spectrum, making it more efficient

§ Can possibly approach efficiencies of 70%.

§ Tremendous heat capacity

§ Cost-Efficient

Cons:

§ Crystals can be damaged easily.

§ Indium Nitride Crystals have many defects

Overview: Eventually we may be able to produce cheaper solar panels, that double efficiency, and are the same size as traditional panels. As of right now researchers are unable to control the formation of atomic clusters, that need to be absolutely perfect in order to capture the full color spectrum. Until they are able to consistently produce fully working full spectrum solar cells (researchers have been working for about 10 years, with little progress), silicon-cell PV systems are the way to go.

Links:

§ Berkley Full Spectrum Solar Cell Discovery

§ On The Path To Full Spectrum Solar Cells

NanoSolar

Pros:

§ Efficient at converting sunlight to energy

§ More Versatile

§ Cost-Efficient

§ Extremely Flexible & Durable

§ Enables Longer Panel Array

§ Easier Installation

Cons:

§ Less Efficient than traditional silicon-based modules

Overview: If any of these technologies were to take over the future of solar energy, Nanotechnology would be the closest one. Nanotechnology uses thinner and lighter panels than traditional modules. Due to the increase in accessibility, installations are lest costly.

Links:

§ Nanosolar

§ Review Of Photovoltaic Cells

§ PowerPedia: Solar Energy

Top Five Recent Advancements In Solar Energy

1. Reflective Dishes

Reflector made of mirrors, that collects sunlight and intensifies it one thousand times over.

2. Spherical Solar Cells

Due to the spherical shape, the cells are able to absorb sunlight from all possible angles, generating more power and a better efficiency.

3. Paint On Solar Cells

-Most versatile type of solar cell, being that they can be placed virtually anywhere.

4. Solar Concentrators

-Increases the amount of sunlight being concentrated on the solar cells. Since more light is directed on the cell less photovoltaic material is needed, decreasing the price of the panel by half.

5. Nanotechnology powered Dye Sensitive Solar Cells

Cost efficient, beautiful to look at, and convert more light to energy.

New Advancements v.s. Traditional Photovoltaic System

With all the future advancements being researched, and all the future progressions, there is only one photovoltaic system that has withstood the test of time. Silicon-based PV systems have helped people achieve their electrical and financial goals using Silicon-based PV systems for over 45 year. [2] Industry reports claim that solar power grew at a rate of 40% per year within the last eight years. The reports also state that the cost per KW of photovoltaic systems have been decreasing, while the cost of electricity generated by fossil fuels has been steadily increasing. [3] The demand for solar photovoltaic systems is expected to double to 2 GW by next year and triple in size to 3 GW by 2012. The industries first billion dollar installation is set to take place this year, with the installation f a 290 megawatt Agua Caliente facility in Arizona. According to Industry reports, solar power will reach cost parity with conventional power sources in the U.S by 2015. Reports also indicate that solar Energy will grow to accommodate 10% of the U.S power necessities. In terms of watts, solar energy consumption will equal above 55,000 megawatts. This may not seem like much to many, but as of now solar energy currently provides less than 0.1% of the countries electricity.

References

[1] History of Photovoltaics

[2]Study: Solar Power Could Provide 10% of U.S Electricy by 2025

[3] U.S PV Market doubling in 2011

Solar Energy For Dummies

2010-10-26T13:26:00.000-07:00

What is Solar Energy?

“Going Green,” is becoming the most popular lifestyle across the world. Everyone is excited about saving the earth and recycling energy, all while cutting costs at the same time. Most people don’t know that there is an easy way to accomplish all of this and some without breaking your bank. Solar energy is radiation from the sun which can be converted into other forms of energy. Solar energy consists of electric energy and thermal energy. The first part of this week's blog series will explain how to convert solar energy into electric energy. Electric energy uses the suns radiation to produce electricity through solar cells, or photovoltaics (PV). There are three ways electric energy can be used; Stand- alone, Grid- connected, and Back-up. In Connecticut the Grid-connected system is used the most. A Grid-connected system uses utility supplied electricity only as a back up, if the solar energy system exhausts its electricity. Most of you may be thinking that it sounds great, but want to know exactly how it works.

Is Solar Energy Rocket Science?

Solar Energy comes off as a complex topic, when in all actuality it is quite simple.

· Solar Cells or Photovoltaic cells are silicon-based pieces of material that absorbs light from the sun.

· Many Solar Cells are combined into a solar panel.

· Solar Panels are than interlinked called an array which creates greater power.

· When Solar Energy hits the panel, it excites electrons in the solar cell and electricity is created.

· The electricity that is produced is in direct current (DC).

· Since most homes do not use DC, the electricity passes through an inverter which converts it to a common current called Alternating Current (AC). And just like that your house is now running on solar energy!

Show Me the Money!

Now that we’re enlightened about how to save electricity by using solar energy, we want to know how adding a Solar energy system actually saves us money. In Connecticut there is a simple process called Net Metering. Net Metering is a special arrangement between a homeowner and their utility company. It is an easy method which measures the difference between the electricity you buy from your local utility company and the excess you produce using your own photovoltaic system. So basically you use the electricity you generate first, which cuts down the amount you would usually buy. If you generate more energy than you use, the extra energy goes through the electric meter and back into the grid and supplied to other customers. According to the agreement that you sign with your local utility company, they will pay you for the energy you are giving back. So when you think about it, by using solar energy you can completely erase your energy bill, and make money by selling energy.

Net Metering alone is a good enough incentive to switch to solar energy, but there is more! Every state gives different tax incentives and rebates to people who use solar energy. In the state of Connecticut there is a State Rebate Program funded by the Connecticut Clean Energy Fund (CCEF) that pays residents $1.75/watt for the first 5 kilowatts of energy generated and $1.25/w for the next 5 kilowatts of energy that is generated.

Basically the CCEF will pay residents up to $15,000 annually for going green!

Homeowners are also able to take advantage of the federal incentives which include a Personal Tax Credit, where they can receive 30% back. Commercial property owners can choose between a 30% tax credit or a 30% federal grant. So along with net metering, you can receive a rebate, a tax incentive, and/or a federal grant. Why not just install a photovoltaic system right now?

Power Drill or Hammer?

The average Joe has had many successes when installing his own photovoltaic system. Unfortunately there has been many failures, which is why it’s recommended to hire a professional solar contractor. The Solar contractor will analyze your roofing and attic to make sure that the structure is able to withstand the light-weight system. Once ready to install they will choose the perfect system for you location and make sure that your panels are secured in the perfect position to achieve maximum solar output. Premier Solar Contractors like PurePoint Energy will even go tremendous lengths to help you obtain necessary rebates and the maximum tax credits and grants to benefit you. Now that we’re all Solar Energy Gurus, lets GO GREEN!

If not for any other reason…. Our President is Going Green!!!!

Connecticut PV Incentive: What’s PTC and how does that affect My Rebate?

2010-09-30T12:08:00.000-07:00

The Connecticut Clean Energy Fund (CCEF), has a state rebate program that is based on the design efficiency of your system. Typically an installer will calculate how much electricity your PV system will produce and compare it with a similar system under ideal conditions. Then they apply a design factor to calculate the dollars per watt price. A more efficient system will help maximize your rebate.

Ideal conditions to maximize your rebate:

ü Include having an inverter that is 94% efficient or better.

ü There can’t be any shading on the site

ü Panels must face solar south (plus or minus 20 degrees), and they also have to be tilted at a 35º angle.

The maximum rebate for residents in Connecticut is $15,000, with a maximum system size of 10 Watts. A maximum rebate will provide residents with $1.75/watt (PTC rating) for the first 5 kW and $1.25/watt (PTC rating) for the next 5 kW. Rebates are paid based on PTC values.

STC Vs PTC

ü STC or “Factory Standard Test Conditions,” uses 1,000 watts per square meter solar irradiance, 1.5 Air Mass and 25 ºC cell temperature.

ü PTC or “Photovoltaic USA Test Conditions,” deals with more of a real life condition. PTC rates output using a condition of 1,000 watts per square meter solar irradiance, 1.5 Air mass, and a 20ºC ambient temperature at 10 meters above ground level and a wind speed of 1 meter per second.

PTC = Real Life Conditions

As you can see the PTC rates output more effectively than STC. The ambient temperature is a better standard than the factory conditions because silicon solar cells average almost 20ºC above ambient temperature in the real world and an increase in temperature causes cell voltage to decrease.

PTC Accounts for Temperature

Also cell voltage drops .08 volts/ºC in places that exceeds 25ºC, which shows that the STC rating is not as efficient as the PTC. Unlike STC, PTC takes account for the fact that the sun is only close to perpendicular for a limited time at high noon. PTC also recognizes that at other times of the day the sun hits the panels at different angles. While taking all of these factors into consideration, PTC averages the solar panels yearly output. The PTC rating tends to be lower than the STC rating since it takes more factors into account, which gives future consumers a better indication of how the solar panels will hold up. So when buying a solar panels the higher the PTC rating the better.

Solar Panels Threatening To Collapse Your Roof? Not a Chance!

2010-09-23T13:03:00.000-07:00

Some of the most frequent questions are around the weight and loads that solar panels put on a roof. This blog covers a few examples of what loads can be found under different climates.

Contrary to many beliefs solar panels are actually very lightweight.

Can My Roof Support Solar Panels?

On average solar panels weigh about 23 pounds and are distributed evenly across a roof. The combined weight of a solar panel and the rack only puts 2-3 pounds of weight per square foot on a roof. Most modern roofs are built to support much more weight than that. There are some cases where a roof has been weakened by water damage and other similar problems. This is no reason to worry being that before every solar panel installation a solar contractor evaluates the roof’s structure to make sure that it can hold the solar panels. With some damaged roofs, structural work must be done before installing the panels.

Upward Force?

In fact the biggest issue when dealing with solar panels is not weight, but rather the uplift. The uplift is an upward force from wind going up and under panels. With enough upward force solar panels can be dislodged from the roof or even worse, your roof can be pulled off along with the solar panels. These are rare circumstances which do not occur frequently. To prevent any damages the panel must be bolted down into the center of the rafters and not just on the shell of the roof. The good part is that solar contractors are trained to install everything properly and keep their customers safety as their number one priority.

Unirac, a solar racking company, has a calculator for standard systems which were used to find the total uplift from wind and down force from snow. Here in Connecticut we have an average snow load at 35 psf, and an average uplift design wind load at -16.5 psf. Since we have mild weather in Connecticut, we are able to use more of a variety of solar panels and racks as the weather is not extreme. In places like Miami where there are 155 mph winds and an uplift of -37 psf, you would need to use a heavier rail, have more attachment points on the roof and consider marine grade solar panels. Flush racks are the best type of mount for high winds compared to Tilt-Up racks. Flush Racks keep the solar panels down on the roof and allow little space for wind to blow under whereas Tilt-Up racks allow wind to cause upward pressure upon solar panels. In areas like Syracuse where there is a 55 psf snow load, your solar contractor, architect or engineer may need to account for additional support due to significant snowfall demands. Since solar panels have a life span of over 30 years, choosing the right racking solution is important to long term success. Contact PurePoint Energy for your renewable energy needs. 203.642.4105 / www.purepointenergy.com

Efficiency Boosted by Color

2010-09-21T13:14:00.000-07:00

Whenever energy is generated, the efficiency of the solar panel is one of the most important factors. If efficiency is low than output is also low. Researchers are constantly trying to figure out how to make solar panels more efficient. There have been many breakthroughs in increasing the efficiency of solar panels. Solar panel’s temperature and type of material have been of major concern, but color seems to be a major factor.

Dark Absorbs More

An objects color is based upon the wavelength that they reflect. White objects reflect all wavelengths, where black objects absorbs these wavelengths. For example, you will notice that a black car absorbs more heat in the summer than other color cars. This may be an inconvenience when dealing with cars, but it can greatly boost efficiency in solar panels. Common solar panels tend to be silver or black. Black silicon was implemented to panels, and were found to be very effective.

Past solar panels maxed out their efficiency by about 25%, while black silicon panels are able to max out at a higher level.

They absorbed more of the sun’s light therefore creating more energy. The reason why black silicon panels are not common is because they have been very expensive in the past. Recently researchers have claimed to have innovated a new way to make black silicon panels more cost effective, in hopes to increase the effectiveness of energy solutions worldwide.

Food Coloring = Higher Efficiency?
The Journal of Renewable and Sustainable Energy recently reported that many off-the-shelf dyes, medical dyes and food dyes can increase solar panel efficiency when mixed properly. The dye is used to change and expand the color spectrum that the panel can absorb, which can increase efficiency by as much as 8%. This low-tech innovation could help improve the effectiveness of solar panels immensely, while keeping prices low.

GreenSun Energy has developed new solar panels that can generate power with non-direct sunlight and use far less silicon than traditional panels. Unlike traditional panels which are silver and black, GreenSun’s panels use bright colors which allow them to capture different parts of the sun’s spectrum.

These bright colored panels have gotten up to 12% efficiency and rising. (Typical panels on the market are around 14% efficient!)

Also the panels are currently being produced for about half the price of traditional silicon based solar panels.

Hydroelectricity on the rise, and pumping!

2010-08-17T09:52:00.000-07:00

Pumped storage hydroelectricity is a type of hydroelectric power generation used by some power plants for load balancing. The first use of pumped storage was in the 1890’s in Italy and Switzerland. In the 1930’s reversible hydroelectric turbines became available. These turbines could operate as both turbine generators and in reverse as electric motor driven pumps.

The method stores energy in the form of water, pumped from a lower elevation reservoir to a higher elevation. Low-cost off-peak electric power is used to runt he pumps involved during the process. During periods of high electrical demand, the stored water is released through turbines. Although the losses of the pumping process make the plant a net consumer of energy overall, the system increases its revenue by selling more electricity during periods of peak demand, when electricity prices are highest.
There is over 90 GW of pumped storage in operation world wide, which is about 3 % of global generation capacity. Pumped storage plants are characterized by long construction times and high capital expenditure. Pumped storage is the most widespread energy storage system in use on power networks. Its main applications are for energy management, frequency control and provision of reserve.

Pon 2112 Announced: Financial Incentives to Follow

2010-08-12T09:16:00.000-07:00

The Pon 2112 programs was recently announced to the public as a way to receive financial support for registered installers. The New York State Energy Research and Development Authority (NYSERDA) provides cash incentives for the installation by Eligible Installers of new grid-connected Solar Electric or Photovoltaic (PV) systems that are 7kW or less for residential and 50 kW or less for commercial sites. Funding for the Solar Electric Incentive Program has been allocated by the New York State Renewable Portfolio Standard. The goal of the program is to install 82 MW or 93,806 MWhs of Solar Electric Power systems. Incentives will be granted on a first-come, first-served basis, and PV incentive applications will be accepted through December 31, 2015, or until funds are fully committed. This program is expected to be a huge catalyst in the green movement, specifically in the installation of renwable energy systems in New York

Local Train Station Looking To Go Green

2010-08-10T06:25:00.000-07:00

A recent article published in the Norwalk Hour explains the Saugatuck train station’s recent decision to push forward and build a solar powered car charging terminal. The structure would be ideal for commuters who leave their electric cars at the station while they go back and forth from work each day. This development has pushed the town of Westport into the frontline of the green movement and it is our hope that neighboring towns will do the same.
Customers would lease out the spaces just like a normal space at a train station and pay a specified monthly fee. This fee would in-turn cover the cost to charge their car leaving them without the burden of doing so on their own. Not only would this breakthrough idea provide benefits for current solar powered vehicle owners, it could also act as the catalyst to increase the number of solar powered cars on the road in our area.

If the Saugatuck train station can receive up their desired eighty percent funding for the project that is estimated to cost $330,000, they are confident that they can rake in the rest from private donations. All the town has left to do to proceed with their plans is to clear the project with the state department of transportation who owns the building. This major step in the green movement is exactly what we like to see in our community!

To read more about this story and other local news stories please visit

http://www.thehour.com/story/485102

Solar Towers

2010-07-27T09:59:00.000-07:00

A solar tower is a proposed type of renewable energy plant. It combines three old proven technologies including the greenhouse effect, the chimney effect and the wind turbine. All together, these three concepts create a renewable energy source equivalent to a set of solar panels. The air is heated by the sun and is stored in a very large greenhouse at the base of the tower. The result is convection and hot air rising through the chimney which in turn, causes the wind turbine at the top to begin spinning. While this turbine is spinning, mass amounts of energy is produced.

While the solar tower has a power conversion rate considerably lower than many other designs in the solar thermal group of collects, the low investment cost per square meter of solar collection balances this out. According to model calculations, a simple solar tower with an output of 200 MW would need a collector seven kilometers in diameter and a 1000-meter-high chimney.

Location is a main factor in the amount of energy the tower produces. Depending on the altitude of the solar tower destination, there may be less or more energy generated than usual. Other factors like wind, rain and temperature may also effect the energy output of the system.

There is an ongoing debate of which type of renewable energy is most effective and productive. While we may never know which will save you the most money, or which is truly the best for the environment, we all know that using any of them will help do our part to save our world.

PTC vs. STC Ratings; Learn what the difference can save you!

2010-07-19T13:13:00.001-07:00

PTC refers to PVUSA Test Conditions, which were developed to test and compare PV systems as part of the PVUSA (Photovoltaics for Utility Scale Applications) project. PTC are 1,000 Watts per square meter solar irradiance, 20 degrees Celsius in air temperature, and have a wind speed of 1 meter per second at 10 meters above ground level. PV manufacturers use Standard Test Conditions, or STC, to rate their PV products. STC are 1,000 Watts per square meter solar irradiance, 25 degrees C cell temperature, air mass equal to 1.5, and ASTM G173-03 standard spectrum. The PTC rating, which is lower than the STC rating, is generally recognized as a more realistic measure of PV output because the test conditions better reflect "real-world" solar and climatic conditions, compared to the STC rating.

Neither a PTC nor a STC rating can account for all "real-world" losses and situations. Actual solar systems will produce lower outputs due to soiling, age of the system, technical difficulties, and other criteria. These loss factors can vary by season, geographic location, mounting technique, azimuth, and array tilt. Taking this into consideration, it is crucial to know how well your system has been constructed and how it is being rated.

To give an example, on an average 10 kW system, taking into consideration several factors, the overall DC (or the STC) rate to AC (PTC) rate can provide you with anywhere from 55% savings, to 100.8% savings. Based on these numbers, an average of 4 hours of maximum sunlight per day, and a cost of twenty cents per watt of energy, you could be saving anywhere from $1606.00 to $2943.36. Though many get these ratings confused, it is apparent from this example how important it is to know the difference between them, especially when it could be saving you thousands of dollars.

Want to save money on your energy bill?

2010-07-13T10:40:00.000-07:00

Connecticut Light and Power is offering certified energy audits for a $75 fee to make your home more energy efficient! Contractors approved by CL&P will come to your house to assess possible energy wasting problems with your house, and then come up with solutions to these problems to make your house greener and more energy efficient. The process, while simple and short, can be a tremendous help in lowering your energy bill.

For those interested in getting their house audited, you must either apply online at http://www.cl-p.com/forms/HomeEnergySolution.aspx and CL&P will assign an able contractor to OR pick a contractor from the approved list at http://nuwnotes1.nu.com/apps/clp/clpwebcontent.nsf/AR/HesContractors/$File/HES_Contractors.pdf and call them to schedule an appointment.

Inspections can/will include the following:

-A blower-door test to pinpoint critical drafts and air leaks. Once they are found, the contractor will seal them properly in the duration of the visit.

-A duct test to assess air leaks within the ductwork system. Significant leaks will be sealed.

- Hot water-saving meaures including low-flow showerheads and faucet aerators (which will be installed).

- Rebates for qualifying central air conditioning systems and for replacement of certain inefficient appliances with qualifying energy-efficient models.

-Installation of energy-efficient compact fluorescent light bulbs.

-Incentives for insulation upgrades

-A "wrap up discussion" where the contractor will review the work done and inform you of additional resources that can be potential energy and money savers.

For more information on these energy audit process, be sure to call 1-877-WISE-USE (1-877-947-3873).

Commercial Savings; Are They Worth It?

2010-07-12T06:39:00.000-07:00

With the green energy movement in full effect, it is no wonder that the Connecticut Clean Energy Fund, and the New York State Energy Research and Development Authority have an abundance of commercial financial incentives for using renewable energy. While these incentives are readily available for people to find, the real question is whether or not they are useful and realistic.

In Connecticut, the CCEF has implemented a rebate program for those users of energy efficient equipment during peak energy using hours. Those who save up enough energy during these peak energy consumption times may be eligible for a state rebate of up to 100% of the systems cost.

Connecticut is also running a state rebate program through October of this year that allows consumers purchasing EnergyStar appliances to apply for a rebate for up to 50% of their appliances cost.

New York has also done its part to promote energy efficient utilities to its citizens. The Commercial and Industrial Efficiency Program provides a set rebate for customers who install an efficient energy saving system of a specific size as long as they are not residential consumers. Also, according to the Commercial Energy Efficiency Rebate Program, companies looking to install multiple energy efficient systems in their business can receive up to $10,000 per project upon inspection.

While these incentives may look fantastic on paper, there are some doubts that we and PurePoint have about them. All of the incentives listed do not list many specifications as to when funding is anticipated to dry up, and what the specific qualifications to receive the funding are. Also, while these incentives may cover some costs of these expensive and technologically advanced utilities, there is still a high portion of the total that is not covered which many businesses cannot afford.

No matter what your take on the subject is, none of us can deny that switching from a low energy saving utility to a high saving one is a good investment and decision.

2010-07-08T13:05:00.000-07:00

From BBC News.

An experimental aircraft that draws its power from the sun is making a round-the-clock test flight.

The aim is to assess whether the plane can fly in darkness, using solar cells on its wings to generate enough power to stay in the air for 24 hours.

The HB-SIA plane, which took off from Switzerland, has the weight of a family car but the wingspan of a big airliner.

The test flight was initially due to take place last week but was postponed because of a technical problem.

"For seven years now, the whole team has been passionately working to achieve this first decisive step of the project," said pilot Andre Borschberg as he entered the cockpit at an airfield in Payerne, in the west of Switzerland.

He is to take the aircraft to an altitude of 27,900ft (8,500m) by late Wednesday, when the sun's rays stop being strong enough to supply the solar cells with energy.

The prototype will then start a slow descent using energy stored in its batteries until sunrise.

"The big question is whether the pilot can make efficient use of the battery energy to fly throughout the night," the team said in a statement.

"If this mission is successful, it will be the longest and highest flight ever made by a solar plane."

'Solar future'

The plane, which has 12,000 solar cells, is the latest step in the Solar Impulse project, which Mr Borschberg leads with his business partner and fellow adventurer, Bertrand Piccard.

Mr Piccard made the first non-stop circumnavigation of the globe in a balloon in 1999.

The pair want to prove that solar power has a practical future in aviation and, more generally, in powering society at large.

The plane incorporates composite materials to keep it extremely light, and uses super-efficient solar cells, batteries, motors and propellers to keep itself in the sky.

The vehicle was unveiled last year and has since been undergoing daylight trials. The first full-day flight was completed on 7 April.

The HB-SIA will be succeeded by HB-SIB. It is likely to be bigger, and will incorporate a pressurised capsule and better avionics.

The group plans to use this vehicle in two years' time to make the first manned transatlantic solar flight, followed in 2013 by an even more daring circumnavigation of the Earth.

Click to go to the original article.

Not To Worry, Summer Lightning Is No Match For Solar PV Systems

2010-06-29T06:35:00.000-07:00

The first thing that comes to mind when one considers installing a solar photovoltaic system is the maitenance of the project. Will I have to monitor it? Clean it? Have it repaired? And most importantly, is it weather proof?While the keep-up of the systems is hot on everyones minds, we can assure you that PV systems can handle almost any storm (figuratively and literally). In order to assure this promise, we take special precautions when dealing with the most common summer threat to the systems; lightning. A lightning arrester is a device used on electrical power systems, or in our case, PV systems, to protect the insulation on the system from the damaging effect of the lightning. Metal oxide varistors (MOVs) have been used for power system protection since the mid 1970's. The typical lightning arrester also known as a surge arrester has a high voltage terminal and a ground terminal. When a lightning surge or switching surge travels down the power system to the arrester, the current from the surge is diverted around the protected insulation in most cases to earth. As we have seen by our recent project in Haiti which was recently struck by lightning and was left unharmed, these arresters do their job effortlessly and can be trusted to keep our PV systems safe.

New Jersey SREC Promotional Opportunity

2010-06-22T09:16:00.000-07:00

New Jersey's renewable portfolio standard (RPS), requires each electricity supplier/provider serving retail customers in the state to include in the electricity it sells 22.5% qualifying renewables by 2021.One way these suppliers are meeting this quota is through the purchasing of SRECs, or Solar Renewable Energy Certificates.
For those who install solar photovoltaic systems, SRECs are awarded and eligible to be sold. Each time a system generates 1,000 kWh of electricity, an SREC is earned and placed in the customer's electronic account. SRECs can then be sold on the SREC tracking system, providing revenue for the first 15 years of the system's life.
In the SREC Trading market, buyers and sellers engage in an auction similar to the stock market. Buyers and sellers respectively call out prices they are willing to buy and sell their certificates for, and these prices are then lined up by price at the close of the auction. A supply and demand curve are created from these prices, and the intersection of the two is referred to as the closing price. This closing price is what all the certificates in that auction will be sold for. If a seller sold their certificates for under the clearing price, their profit will be more than what they originally sold their SRECs for. If a seller sold for higher than the clearing price, they will receive less than what they sold for. This process ensures a fair market and a fair selling price.

July 2010 Trading Statistics:
Low: $170
Average: $550
High: $685

Problem: Oil Spill, Solution: Clean Energy

2010-06-10T05:41:00.000-07:00

As many of us know, oil spills make a huge impact on our lives and on the lives of animals and plants they interfere with. From the Exxon Valdez oil spill in Alaska in 1989 to our most recent oil spill in the Gulf of Mexico, they truly have an affect on everything. Traces of oil can still be found in the Prince William Sound in Alaska nearly 21 years after the incident, and if not contained, the oil from the Gulf of Mexico could destroy the grassland areas in Lousiana causing the coastline land to erode away. Animal and plant life is destroyed in oil spills, causing the death of millions of innocent animals, just trying to survive in their familiar habitat.

Clean energy, while not an immediate solution for destruction that oil spills cause, can prevent all of these problems by taking us away from our dependency on oil and fossil fuels. Without this dependency, oil companies will have no choice but to downsize their oil drilling facilities, decreasing the amount of facilities that could potentially cause oil spills and other destruction of wildlife. Clean energy offers a means of protecting and preserving the environment for the future, while being cost effective and convienent!

A Buyer's Guide to Solar Panel Warranties!

2010-06-03T07:31:00.000-07:00

While considering the purchase of a solar panel system, a few things should be taken into consideration first (most importantly the warranties on the products you are about to buy). Here's a summary of what to expect as far as warranties on solar panels go:
-Almost all solar panels should have at least a five year installation warranty, meaning that the company installing the solar panels should cover the cost it would take for the manufacturer of the panels to repair any damages caused by errors in the installation of the panels.
-The actual manufacturers warranty should be for about 25 years. Since solar panels are built to last (they are made to handle just as much damage as a rooftop could withstand) a long warranty is only logical. This warranty should cover the costs of either the repair or replacement of panels damaged by the everyday wear and tear of the weather and other natural causes.
(TIP: When buying solar panels, always be sure to inquire about the warranted minimum power rating of the system. This is important because this minimum power rating is the only guaranteed amount of power that the system will produce).
-Also when buying solar panels, it's extremely important to be sure to find the panels that have the longest factory guarantee. Some dealers may offer a guarantee that lasts longer than the actual factory guarantee ( be aware of this, some dealers may not be in existence by the end of the guarantee!)
-An inverter warranty should also always be included. This warranty should last about 10 years. It's important to have this warranty because the inverter (which converts the captured solar energy into energy usable for your home or business) is an extremely vital part to the solar panel system!

Taking warranties into consideration is extremely important when investing in a solar panel system. Be sure to do your research beforehand to avoid any inconveniences and to be sure that your new investment is protected!

PurePoint Energy & Eco-neering in Action!

2010-05-12T13:52:00.000-07:00

When the Greenburgh Nature Center needed a solution that would allow them to demonstrate the temperature difference between the surface of an asphalt roof and a green roof, PurePoint Energy provided it (150º vs. 75º!). We did so by troubleshooting a solution in which we were able to use a single 90-Watt solar panel with non-ideal sunlight to power two large temperature displays. The result was a 75º difference in temperature on the different surfaces. As a result—it’s easy to see that green roofing could be an interesting development in the fight to stop global warming!

PurePoint Energy LLC was founded with the goal of providing efficient renewable energy solutions to residential and commercial customers on a consulting and installation basis (top to bottom), but it’s projects like this that remind us of the long-term benefits that renewable energy can have for the environment.

Benefits of Green Roofing:

Protection of roof membrane resulting in a longer material lifespan (it is estimated that green roofs will last up to twice as long as conventional roofs), resulting in decreased maintenance and savings in replacement costs;
Savings on energy heating and cooling costs, depending on the size of the building, climate and type of green roof.
Soil, plants and the trapped layer of air can be used to insulate for sound. Sound waves that are produced by machinery, traffic or airplanes can be absorbed, reflected or deflected. The substrate tends to block lower sound frequencies and the plants block higher frequencies.
Opportunities to recycle aggregate and compost.

www.greenroofs.org

PurePoint Energy takes a trip to Samuel Staples Elementary School!

2010-04-27T15:08:00.000-07:00

On April 12-14th, PurePoint Energy paid a visit to six classes of eager second graders excited to learn about possibilities in renewable energy. The students were quick to differentiate between the miniature wind turbine and the large solar panel presented at the front of their classroom, just as they were confident that such a large solar panel would surely produce more energy than a small wind turbine-especially with the calm weather outside.

After coming up with some locations that we thought would be sunny and not-so-sunny, we set out on a mission. It was critical that we first learn the use of a multimeter, which would tell us how much power we were producing. There were many helpers involved in this process as we first measured the Volts, and then Amps being produced. A few mathematician/scientists in the crowd were quick to point out that all we had to do was multiply the volts by the amps to get WATTS! As we repeated this procedure in a few different spots, a small but noticeable difference was apparent when we took the panel out onto the completely unshaded soccer fields-the lack of shading provided solid access for the sun's rays to power our solar panel! As we always made sure to point the solar panel directly at the sun...it was clear that more sun=more power!

At the end of the day, the PurePoint staff had a great time taking a break from work to talk with young econeers about the importance of renewable energy in today's world. Hopefully they will each remember and take this lesson in renewable energy to heart after seeing firsthand the shocking (for a second grader) and powerful renewable resources that Earth has to offer.

Solar Panels & Maintenance

2010-04-20T11:14:00.000-07:00

The simple consensus on cleaning solar panels is: do it if they're dirty. The placement and orientation of your panels will likely affect whether they often require cleaning. Panels that are mounted on an angle (i.e. on a roof or ground mount with a tilt), for example, require little maintenance because the rain will naturally keep them clean.

Things become a little more difficult when dealing with the maintenance of horizontally-oriented panels. Flat panels will naturally benefit less from rain, and are more likely to acquire a cover that can significantly affect its production. These panels should be visually checked once every few months, and more often if they situated in locations where sand and dirt is often blown around.

This study by Google found that minor accumulation of dirt on the corners of panels will not significantly detract from production. However-don't let it go too far! Solar panels rely on direct sunlight and any interference has the potential to disrupt peak production.

So how do you clean solar panels?

Always be careful! Even though the panel's live electrical components are not on the surface, you don't want to risk damaging any of the glass or plastic shielding. If anything appears cracked or broken-it might be a good idea to first consult with a professional! Otherwise-it's just like cleaning a window. Water, sponge, non-abrasive drying cloth, and if you really need it, streak-free soap/glass cleaner.

For larger projects, automatic cleaning systems may be a useful option.

PurePoint Energy offers full cleaning and maintenance services to preserve the peak production of your solar panels.

Blemished Panels: Cost effective, Identical Performance, Reliable & Safe.

2010-03-25T13:24:00.000-07:00

Blemished panels ("B" panels) are solar panels that have been cosmetically damaged during the production process. Since PurePoint strives to use the most cost-effective panels in its projects, we were excited to hear that blemished Evergreen 205 Watt Solar panels were available at a lesser cost than their "A" panels. But was there anything wrong with these panels? Did they produce the amount of power consistent with an "A" panel? Were they safe? The answer is YES.

PurePoint Energy spoke with a technology specialist at Evergreen Solar who informed us that "B" panels are designated after all panels have gone through the same production process using the same materials. They have also already passed production and safety inspections. Inspectors will find some panels that have cosmetic imperfections such as a scratch on the frame, one side of the glass, or perhaps a corner that is left one millimeter open. The inspector then stamps these panels to show that they hold cosmetic imperfections.

So do "B" panels produce just as much power as "A" panels? YES. In fact, Evergreen offers the same 25 year guarantee on solar production for their B panels as they do for their A panels. But are they safe? YES. They pass through the same safety inspections as "A" panels. Is there anything wrong with these panels? NO-only cosmetic imperfections. Are they an extremely cost-effective solution with only minor cosmetic drawbacks? YES.

Evergreen has also offered this letter guaranteeing the performance, reliability, integrity, and lifetime of their panels.

What Photovoltaic technology is right for me?

2010-02-19T11:53:00.000-08:00

The quick and dirty on traditional PV technologies.

What does efficiency mean in a solar panel?

Solar panels manufacturers claim efficiencies ranging from 4% to over 22%. Efficiency refers to the ability to take solar energy and turn it into usable electricity. It's important to understand that a 200 watt solar panel that is 10% efficient will generate as much energy as a 200 watt solar panel that is 20% efficient. The difference is the 10% solar panel will be twice as large. Less efficient solar panels typically are less expensive than more efficient solar panels. So, if you have ample room for solar panels then using more affordable and less efficient solar panels will increase your return on investment. If ROI is your goal less efficient can be more effective.

Here are the three most common technologies:

Monocrystalline silicon cells are single wafer cells that are the most efficient in converting solar energy to electricity (15-22%). These cells tend to be more expensive. The wafer is cut from cylindrical ingots, meaning the cell will not cover a whole square area on a panel, and will end up with gaps.

Multicrystalline silicon are cut from square ingots and are cheaper to produce, however they are less efficient than their monocrystalline cousins. Multicrystalline (also known as poly crystalline) cells have a square shape allowing them to take up a whole square area on a solar panel without leaving any gaps. The typical efficiency of multicrystalline cells are 14-19%.

Ribbon cells is a type of multicrystalline silicon cell that is manufactured from molten silicon. This process reduces the waste of silicon, the most expensive part of a solar panel. Ribbon cells are less efficient than monocrystalline and traditional multicrystalline cells with an efficiency of about 13-15%.

Do you need help figuring out which solar panels will be best for your application? Contact an expert with proven experience - PurePoint Energy

Purepointenergy.com
203.642.4105
info@purepointenergy.com

What happens to a solar panel in a wind storm?

2010-02-08T12:46:00.000-08:00

Modern solar panels are built to withstand harsh conditions and most come with 20-25 year warranties. They can last much longer than that if properly installed, it is important to have a trained technician doing your installation. So how do I prevent solar panels from being damaged in high winds? You don’t have to do much. Most panels have a hard, clear plastic coating. Investing in a sturdy bracket and proper installation will pay off in the long run, and prevent the wind from having any effect on your solar array. Anything that hits the solar panel like hail or small tree limbs should bounce right off without doing any damage. The durability of PV solar has been proven in outer space NASA’s oldest solar panels are over 30 years old.

It’s February, it’s cold and there’s snow on my solar panels. What do I do?

2010-02-01T14:25:00.000-08:00

Most people in the northeast don’t believe that solar is a viable option. Here at PurePoint Energy, we want to make you aware of the advantages and disadvantages of solar in the North Country. This month we’ll blog once a week about New England solar specific topics.

Having solar panels in the north with shorter days of sunlight, colder temperatures, and snowfall might seem like a bust; we aren’t saying that Portland, Maine will generate more solar power than Albuquerque, NM – but solar is still effective. PurePoint Energy would like to explain to you the facts about solar energy in the winter. These facts will answer your questions on how snow melts off your panels and how lower temperatures can actually increase power output.

The low down on snow.

If the snow completely covers your solar panel the panel will not create any energy. Your thinking: Do I need to go up on my roof and scrape it off, risking life and limb to make sure I’m getting a good return on my investment? No.

The solar panels will typically create enough heat to melt the snow off by mid afternoon.

This graph was found at http://www.solardave.com/

Snow is translucent and will heat your dark solar panels. This graph shows the result of snow melting from morning until about 1:00pm. Typically snow will fall off in one sheet (so make sure to be careful that neither you nor your car is directly underneath). This is apparent in the graph above with the sharp increase in energy production. So when it snows be patient, just wait for the snow to melt off and think of the upside.

Yes, there is an upside:

Temperature can drastically effect the energy production of a panel, for those of us that live in the north that’s a good thing. Colder temperatures increase the efficiency of a panel while warmer temperatures decrease efficiency.

This is a spec sheet from a GE PVp-200-M solar panel.

For example: this solar panel looses ½ a percent of efficiency for every 1°C increase. So if we look at the first week in February, the high in Miami FL will be 24°C while in Norwalk, CT (Pure Point Energy’s Headquarters) the high for the week will be 4°C. That’s a difference in 20°C, or 10% more power generated by your solar panels at solar noon.

So even though we live in the north we can still make solar work for us.

Purepoint Energy Expresses Sorrow for Haitian Earthquake Victims.

2010-01-21T08:42:00.000-08:00

Management seeks to continue developing Haiti’s renewable energy infrastructure.

Purepoint Energy, a Norwalk based company, expresses sorrow for victims of the January 10 earthquake. The Company, which completed a solar project in 2009, is grateful that the team it worked with in Fermathe, Haiti is safe. Purepoint continues to be concerned about the large destruction of infrastructure in Haiti.

Haiti often has the lowest coverage of electricity in the Western Hemisphere with only about 12.5% of the population having regular access to electricity. In addition, Haiti’s large share of thermal generation (70%) makes the country especially vulnerable to rising and unstable oil prices. With regard to renewable sources, hydroelectric generation accounts for about 26% of total installed capacity. With regard to solar power, rural electrification projects could apply off-grid solar technology. PurePoint Energy is continuing to see if it can provide any expertise or services to any of these projects.

Purepoint Energy is an international installer of renewable energy systems and components. PurePoint Energy is an approved eligible installer for the Connecticut Clean Energy Fund (CCEF), the New York Energy Research & Development Authority (NYSERDA) and Renewable Energy Vermont (REV).

The company also has experience working in Haiti and throughout the United States, Latin America and the Caribbean. In late 2009, Purepoint installed a 2.1KW solar panel system in Fermathe Haiti. More information on this project can be accessed at:

http://www.purepointenergy.com/

Tom Wemyss
PurePoint Energy
203.642.4105
28 Knight Street
Norwalk, CT 06851

A New Roof and Solar Energy All in One

2009-12-14T13:12:00.000-08:00

Is your roof getting old? Is it time to replace it? Why not also consider installing a solar energy system as part of your roof. Cutting edge technology over the last decade called solar shingles has emerged as a newer type of photovoltaic modules that can be incorporated into buildings (BIPV – see previous blog). These solar shingles have been designed to look and act like regular shingles, but have the added benefit of creating energy from the sun. These shingles use flexible thin film cells which allow them to be installed as part of the roof. These shingles help extend the normal roof life by protecting against water damage and ultraviolet rays. Also, since solar shingles replace traditional shingles, a homeowner will save on materials and will benefit from reduced electricity costs. Depending on the type of roof, solar shingles are available in different sizes and styles.

Dow Solar Shingles

Please contact PurePoint Energy with any questions and to find out more about renewable energy options. http://www.purepointenergy.com/your.htm

Top 10 Reasons to Pick PurePoint Energy:

2009-11-18T14:36:00.000-08:00

Superior Customer Service: We listen to you because you are our top priority.

Turnkey Solutions: We are your one stop green energy solution.

Solar, Wind, Hydro or Biomass: We’ll put your resources to work for you.

Variety of Products: We will get what you want. We have non-exclusive relationships with a host of manufacturers.

Aesthetics: We can do solar shingles, wind turbine sculptures or translucent solar skylights! Your imagination (and physics) is our only limitation.

Honesty and integrity is paramount.

Off-Grid Specialists. Need clean electricity in a rural place (Islands, Mountains, International)? We’ve been there and done that.

Think you’ve got Wind? We have high quality commercial grade wind data recording and analysis equipment to see if wind energy is the right choice for you

In depth complimentary proposals: because knowing is half the battle

Site visits: Have you ever wondered what it takes to start saving money and
helping the environment? It only takes one call, so call today 203.642.4105

Please visit http://purepointenergy.com for all you alternative energy needs.

BIPV – Solar Energy with an Aesthetic Appeal

2009-11-09T11:40:00.000-08:00

For some interested in solar energy, the look and size of the solar panels that sit atop a house or building can be an eyesore. While some like the futuristic look of the solar panels, others view a solar array as a clunky addition to a building. However, nowadays, solar panels don’t have to jut out of the exterior of a house with no regard for aesthetics. A Building Integrated Photovoltaic system (BIPV) consists of integrating photovoltaic modules into the structure of the building, most often into the roof or the façade. Unlike the traditional hard crystalline PV panels, BIPV modules include a variety of different materials that can be incorporated into the building itself. For instance, solar roof tiles can substitute for traditional shingles while generating electricity and blending right into the roof. Façade PV modules can be installed on buildings giving them a whole new chic, futuristic look. The ability to alter the transparency of solar panels can allow PV modules to replace materials that are commonly made with glass and similar materials such as windows or skylights.

These BIPV systems serve not only to create architectural appeal but also provide savings in materials that would otherwise be used and reduced electricity costs. Along with this, these systems will help protect against the weather and will be a source of clean, renewable energy.

To find out more about BIVP systems and solar energy please visit us at http://www.purepointenergy.com/

Freedom: Off-Grid in Haiti.

2009-11-04T10:42:00.001-08:00

Off-Grid Living in Haiti

Proud owners of a PurePoint Energy off-grid solar-electric system!

Haiti is one beautiful country with an abundance of culture, agriculture and sunshine. The country's rugged landscape is surrounded by crystal clear blue water escalating into dramatic mountains in the core. One luxury that is not readily available in this country is electricity.

According to the World Bank:

Only 12.5% of Haiti's population has access to regular electricity. These electric costumers receive an average of 10 hours of electricity per day.

This very much held true while we were in Pétionville, a suburb of Port-au Prince where electricity appeared and disappeared with no regularity. Our client is constructing a home in rural Haiti on top of a mountain with no access to grid electricity or water.

Our goal was to create a cost effective solar electric system that would meet all the energy needs of our client while being low in maintenance. We began with a thorough energy analysis - assessing the demands of both small and large appliances. The new home has been designed to be extremely energy efficient. The final design was a 2100 watt system with backup batteries.

While the house was constructed, PurePoint Energy scrutinized over each component of the system - as getting equipment last minute in Haiti is either timely and costly. Each trip to the local hardware store to pick up some bolts, nuts and other miscellaneous items took 6 hours.

Our planning paid off and the installation went as smooth as could be expected.

For more Pictures of our Haiti Trip and other projects click here

We look forward to doing more projects in Haiti, the Caribbean and beyond.

Please contact PurePoint Energy for your energy needs:

Office: 203.642.4105
www.purepointenergy.com

PurePoint Energy completed a 2.1 kW Photovoltaic System for the Currelly residence.

PurePoint Energy Awarded One of Five Grants for Solar Energy Projects in the State of New York

2009-10-05T10:31:00.001-07:00

Back in July, PurePoint Energy worked on its first USDA Rural Development grant application for a 22.8 kW solar project for the Hepworth Farms in Milton, NY. Just this week the USDA awarded close to $1 million for renewable energy projects, and Hepworth Farms was given a grant of $45,000 for their solar photovoltaic system.

Future Site of 22.8 kW Solar Photovoltaic System

The funding comes from the USDA’s Renewable Energy for America Program (REAP), which gives grants and loans to farms and rural businesses for renewable energy systems and energy efficiency improvements. The program, which requires matching funds from the farm or business, has allowed an increasing number of farms and small businesses the ability to invest in clean energy. PurePoint Energy is excited for the grant approval and looks forward to moving into the installation phase of the project in the coming month.

To learn more about renewable energy and to find out what grants and loans might be available for your business, please visit us at www.purepointenergy.com.

Getting the Most out of Your Solar Panels – Maximum Power Point Tracking

2009-09-24T13:50:00.000-07:00

Traditionally, it was expected that a solar panel, lets say one rated at 130 watts, would only produce a portion of those watts (say only 88 watts) due to inadequate voltage levels between the panel and the battery in off grid systems. Most panels are designed to put out 16 to 18 of actual volts, while a typical battery produces somewhere around 12 volts. A standard charge controller transfers the current from the panels directly to the battery resulting in the panel voltage being dragged down to sync with the battery. Up until relatively recently this was the norm. However, with the creation of the Maximum Power Point Tracker (MPPT), solar panels have been able to produce power much closer to their optimal electric load. A MPPT is a high efficiency DC to DC converter that uses inverter technology to convert the voltage that the panel wants to work at for maximum power and turns that into more current at the voltage level of the working battery. A MPPT works to track what is called the maximum power point, which changes based on weather conditions and the time of year. Without a way of tracking this power point, it won’t be reached. Nowadays, on-grid inverters use MPPTs to maximize power from the solar panel array. For off grid systems, an MPPT charge controller is utilized to generate maximum power. More recently, MPPT charge controllers have become more affordable making it a very wise investment for any off-grid battery supported solar energy system.

To find out more information about solar energy please visit http://www.purepointenergy.com/

Costs of a Solar Energy System Cheaper than Ever Before and Poised to Fall Further.

2009-09-08T12:27:00.000-07:00

One of the major challenges that people face when considering a solar energy system for a residence or business can be the initial cost of the installation. It’s an unfortunate reality, but many a business and family have had to forgo their dreams of generating their power from a renewable energy source. Until now.

Since 2008 both individual states and the federal government have been stepping up their efforts to provide incentives that dramatically reduce the cost of a solar energy system. The federal government now offers a 30 % tax credit for the first year of installation. Across the nation, states have been passing legislation that decreases the upfront cost of solar energy systems. In fact, both Connecticut and New York offer some of the best incentives in the country. State incentives often come in the form of rebates passed onto customers through particular state programs. These rebates vary based on the size of the solar system and sometimes based on the area you are located in. To find a complete breakdown of the incentives in your area please follow the link and click on your state. http://www.dsireusa.org/.

And that’s not all the good news for consumers. Recently, the price of solar panels has been steadily declining since 2008, and by some estimates the price will drop as much as 40 % by 2010. The main cause of this price drop is due to the increased supply of the main ingredient in solar panels, polysilicon. This coupled with a decrease in demand for solar panels due to a shrinking economy in parts of Europe has helped drive the price down. With decreasing costs and great monetary incentives, now is the time to look into solar.

For more information on solar energy systems please visit http://www.purepointenergy.com.

PurePoint Energy Installs a small wind Turbine for the Green Light Academy and thePenfield Lighthouse

2009-08-13T06:01:00.000-07:00

PurePoint Energy and Torrefaction

2009-08-12T07:27:00.000-07:00

Biomass is organic material that contains stored energy from the sun. Examples of biomass are wood, plants, garbage, alcohol fuels, and landfill gases. Deriving energy from biomass will help reduce the use of fossil fuels, reduce greenhouse gas emissions, and reduce waste management problems.

There are many roadblocks when extracting energy from the typical biomass. Most unprocessed biomass are low in energy, moist, and expensive to transport. These obstacles prevent biomass fuel from growing in the renewable energy world.

Torrefaction is a new, feasible method for improving the properties of biomass fuel. It consists of slowly heating a biomass at a max temperature of 300 degrees Celsius. The end product is a solid, uniform product of low moisture content and higher energy content. This allows transportation costs to decrease, while increasing energy yield.

PurePoint Energy is continuously seeking ways to work with other organizations to create customized solutions using biomass technologies. If you would like to learn more about renewable energy, please feel free to send us an email at info@purepointenergy.com.

Please visit our website to learn more about biomass, solar energy and wind power.

PurePoint Energy and The Completion of our First Wind Project

2009-08-07T07:23:00.000-07:00

On Wednesday, August 12, 2009, the PurePoint Energy team and about a dozen students attending Greenlight Academy worked together in installing one of two wind turbines at Penfield Lighthouse in Fairfield, Connecticut.

"We're trying to show you can use solar, you can use wind, to create electricity economically, especially in remote locations," said Tom Wemyss, co-founder of PurePoint Energy.

The lighthouse is far in proximity from the shore, which rules out the possibility of a power line. With the addition of it’s new 24 volts turbine and solar panels, Penfield Lighthouse is completely green, and a prime model of how renewable energy can make sense financially and environmentally.

Working with the students of Greenlight Academy and Beacon Preservation has proven to be a valuable learning experience. We view this relationship as a microcosm for things to come, as we strive to work with others in developing a cleaner, sustainable future.

If you believe you have a windy site and are interested in being part of a wind project please call or send us an e-mail to learn how we may be able to work together.

Please visit our website at www.purepointenergy.com for more information.

PurePoint’s Connecticut Post coverage: http://www.connpost.com/localnews/ci_13008501

PurePoint’s Fairfield Citizen News Article: http://www.fairfieldcitizenonline.com/local/ci_13012265

PurePoint Energy and Meteorological Towers 101

2009-08-05T08:07:00.000-07:00

PurePoint Energy and our partner Alternity Wind Power have installed two 190' Meteorological towers in Clearwater County, MN. This is a big milestone in our pathway to developing a 100 MW wind farm that should provide enough electricity for up to 30,000 homes.

Meteorological (MET) towers are used at potential wind energy project sites. Attached to the towers are equipment that assess the wind resource and other environmental factors that are important to determine the viability of a wind project. Important equipment include an anemometer, wind direction vanes, and temperature and pressure sensors.

Dependent data is usually statistics recorded over a minimum of one year. Wind date is taken every 10 minutes and stored at the tower base, which contains a recording and memory device called a data logger. The data collected is resourceful prior to installing a wind turbine. Educated knowledge on a site is vital for optimal wind turbine performance and getting financial great electrical generation statistics.

PurePoint Energy is currently working to educate others on renewable energy and sustainable technologies. If you believe you have a windy site are interested in being part of a wind project please call or send us an e-mail to learn how we may be able to work together.

Please visit our website at www.purepointenergy.com for more information.

PurePoint Energy and Tips on How to Save Energy

2009-08-03T11:41:00.001-07:00

As a renewable energy consultant and developer, PurePoint Energy values positive environmental leadership. A key solution to preserving our environment is renewable energy. This is why PurePoint Energy is focusing our efforts in educating consumers and citizens on the benefits of going green. There are small adjustments you can make to save energy and use electricity right now!

Turn off unneeded lights/use energy efficient light bulbs
Turn off your computer at night.
Use microwave instead of oven for cooking meals.
Use laptops instead of desktops- Laptops draw 15-25 watts when used. This is compared to an astounding 150 watt of a PC.
Use thick curtains- Thick curtains provide better insulation, which can make a huge noticeable difference in comfort and electric bills.
Showers instead of baths- More hot water is used when taking baths, which results in more energy use.
Unplug devices from electrical outlets- Most devices still draw up to 90% of their power usage when turned off.

There are currently generous rebates and incentives to get a residential energy audit in Connecticut. Please contact PurePoint Energy 203-642-4105 to learn more on how we can help you or your organization go Green. Please visit our website at http://www.purepointenergy.com to learn more.

PurePoint Energy and the Students of Green Light Academy

2009-07-31T07:35:00.000-07:00

On Thursday, July 30, 2009, Mr. Tom Wemyss, Business Developer and Vice President of PurePoint Energy LLC, took time to speak with high school students at Green Light Academy at Penfield Lighthouse.

Green Light Academy is a summer program made possible by Beacon Preservation, a nonprofit organization dedicated to the preservation of lighthouses and their environments for educational, cultural, recreational, and historical preservation purposes.

The students are taught a “green” curriculum that challenges them to explore renewable energy sources including wind, solar, and tidal current. Mr. Wemyss mainly covered wind energy, and drew substantial interest and engagement from the students of Green Light Academy.

PurePoint Energy will be installing two small wind turbines at Penfield Lighthouse in Fairfield, CT. In short, this was a positive experience and a step towards the right direction for PurePoint Energy, Beacon Preservation, and the students of Green Light Academy.

For more information on how PurePoint can help you go Green, please visit http://www.purepointenergy.com/.

PurePoint Energy and Positive Environmental Leadership

2009-07-24T10:07:00.000-07:00

The PurePoint Energy Mission Statement expresses our genuine value on positive environmental leadership. We are ardent supporters of the Green Movement and are constantly working to meet and exceed all commitments with impeccable attention to detail.

PurePoint Energy is currently working on two notable projects:

Haiti

We are currently installing a 2kW off-grid, photovoltaic system in the mountains of Haiti for Mr. and Mrs. John Currelly. The Currelly household currently has no access to electricity. PurePoint Energy is working to help them maintain a standard lifestyle while preserving the beautiful landscapes of Haiti.

Shevlin, Minnesota

PurePoint Energy has partnered with Alternity Wind Power to develop a 100 megawatt wind project. We are currently collecting wind data, interconnection permitting, and identifying potential off-takers for the wind energy. Currently, 10+ landowners have signed on in belief that this project will benefit the town without changing the purpose of the land.

Join PurePoint Energy and take initiative in offsetting carbon footprint by going green. For more information, visit www.purepointenergy.com

Nanosolar Solar Power Technology

2009-07-24T08:20:00.000-07:00

Nanosolar Inc is a developer of solar power technology. Their main product is sold at $1 per watt, which is one fifth the price of silicon cells.

Nanosolar technology uses copper indium gallium diselenide, which achieves up to 19.9% efficiency in laboratory samples. Combined with other factors, Nanosolar Technology successfully blends the needs for efficiency, low cost, and longevity. In addition, Nanosolar is light weight and easy to install.

Estimates by Nanosolar Inc indicates panel costs to be between 1/10th and 1/5th the industry standard per kilowatt. The state of the art panels are also projected to have an incredibly long lifespan and come with a 25 year warranty.

Contact PurePoint Energy today to learn more about how we can help you implement Nanosolar technology and solar to your home.