Easy Solar Power

With superefficient peel-and-stick PV sheets, solar power is better than ever!
By Cheryl Long
October/November 2006
Add to My MSN

Renewable energy expert Steve Heckeroth developed this building’s integrated thin-film solar roof system.
Photo by Matthew T. Stallbaumer
Slideshow


Content Tools

Related Content

Photovoltaics: The Future of Solar Power

The fastest-growing energy technology in the world is solar, and photovoltaic solar collectors captu...

Pros and Cons of DIY Solar Panels

Yes, you can make your own solar panels, but it won’t necessarily save you much money compared with ...

The Evolution of My Solar Arrays

Cam describes how our solar electric system has evolved over time.

Can Solar Panels Be Damaged By Hail?

Solar panels are strong enough to resist damage from most hail. But if you live in an area where lar...

Installing clean, reliable, inflation-proof solar power is easier than ever, thanks to the invention of thin-film photovoltaic (PV) laminates that can be bonded directly onto metal roofing panels. Unlike crystalline PV material, there's no need for obtrusive racks and heavy, expensive glass. Instead, unbreakable thin-film PV is produced using amorphous silicon, encapsulated in Teflon and other polymers.

Thanks to pioneering work by Steve Heckeroth, a Mother Earth News contributing editor and the director of building-integrated photovoltaics for Energy Conversion Devices (ECD) Ovonics, this thin-film PV is now available in easily shippable, 16-inch-wide rolls. It's a peel-and-stick laminate. You just unroll the sheet, lay it faceup on a flat metal roofing panel and press it onto the panel while your assistant pulls the protective sheet off the sticky backing.

Invented by ECD Ovonics co-founder Stan Ovshinsky, thin-film laminates offer several advantages over crystalline PV panels. (See Meet Stan Ovshinsky, the Energy Genius for a profile of Ovshinsky and his remarkable renewable energy inventions.) Thin-film sheets perform better in high temperatures and in partly shaded conditions, and they require 100 times less silicon, which means thin-film PV is expected to become less expensive than crystalline as production capacity expands over the next few years.

We had a chance to get a firsthand look at this exciting new PV option after Heckeroth offered to install it on the new metal roof I was putting on my small barn last summer. We invited the public, and Heckeroth led a workshop about solar power. Nearly 50 folks spent an unusually hot, 100 degree May day watching and helping as Heckeroth showed volunteers how to bond the thin-film PV laminates to the metal roof panels. Then local architect and builder Kenton Knowles and his Global Homes crew installed the panels on the barn. As the sequence of photos shows, it's hard to imagine a simpler way to install grid-tied, solar-electric power on a new or replacement metal roof. It took only five to 10 minutes to apply each PV sheet to a roof panel.

Our new metal roof was 24-gauge Galvalume steel from Englert, Inc. It should last at least 50 years, and the steel can be recycled, making it an excellent sustainable choice for any building. After the roofing panels were installed, Heckeroth danced briefly along the ridge to snap the connecting wires together, and then our electrician, Robert Gore, wired the direct-current output from the thin-film PV into a Fronius inverter. The inverter converts the direct-current power generated by the solar panels to standard 110-volt alternating current. Then the power flows through the new meters installed by the utility company (at no charge!) and into my home.

The sun was blazing, and the roofers were really sweaty, but as soon as Gore flipped the switch, everyone smiled as the inverter kicked on and the digital readout quickly climbed to "1,530 watts," showing exactly how much electricity the new system was delivering to the house. Anytime the house needs more power than the PV is producing, the system draws from the utility grid.

What's It Gonna Cost?

The only hard thing about grid-tied solar power is paying for it, but it makes more economic sense every time the rising cost of oil pushes up energy prices. Now, ECD Ovonics' thin-film PV costs about the same as crystalline PV with glass covers and frames, $4 to $5 per watt, but it requires less labor to install.

In addition to the PV, you'll need an inverter (ours cost about $2,500), cables and switches, plus the services of an electrician and roofers. Then you subtract all tax credits, rebates and other incentives available in your state. The final cost will vary greatly depending upon where you live.

Two major variables will determine the long-term value of your PV system: 1) Your utility's electric rates and how much they increase over the 25-year life of your system and 2) State and federal incentive programs to promote renewable energy. Here in Kansas, a small system such as our grid-tied 1.8 kW setup would cost about $7,200 for the PV, plus $2,500 for the inverter and switches, plus labor. We can reduce this amount by claiming a federal income tax credit of about $2,000. Kansas unfortunately has no state incentives to encourage solar power development, nor has it passed a net-metering law that would require our utility company to pay us a retail rate for any electricity our system sends back to its grid. Kansas is lagging behind the rest of the country — 40 states have now passed net-metering laws and most have enacted incentives to support further development of solar, wind and other renewable energy options.

In nearby Colorado, for example, some utilities are paying rebates of up to $6 per watt to homeowners who install PV systems, thanks to a state law requiring utilities to generate 10 percent of their power from renewable sources by 2015. So in Colorado and dozens of other states that offer generous rebates and credits, solar power has become a very attractive option.

It's hard to predict exactly how fast a PV system will pay for itself, since nobody really knows how high the cost of grid electricity will climb as oil and gas prices rise (along with growing concerns about global warming) and how much the prices for PV will shift as demand and production capacity increase. But in the dozens of states that have decided it's wise to offer generous renewable energy incentives, investing in solar power already makes great sense. To find out what incentives are available in your state, visit the Database of State Incentives for Renewables & Efficiency. For more about how to calculate the payback period, see You Can Afford Solar Power.

A straight cost/benefit analysis is not the only factor to consider. If you choose to go solar, you will be supporting an industry that is poised to make a major contribution to the looming energy crisis and our global warming predicament. Buying a solar-electric system is one of the best things you can do to help protect our environment and to give your family some protection from skyrocketing energy prices and the uncertainties caused by climate change. Every homeowner who opts for clean, renewable solar power is taking us one more step toward a wiser, more sustainable human presence on Earth.


Cheryl Long is the editor in chief of Mother Earth News. She lives south of Topeka, Kan., on an eight-acre homestead and loves hearing her PV inverter hum every time she walks into her barn.

Check out the Related Content box to watch a video of solar expert Steve Heckeroth explaining how building-integrated thin-film solar power works. Heckeroth is a MOTHER EARTH NEWS contributing editor and the former director of building-integrated photovoltaics for ECD Ovonics.


Learn More about Easy Solar Power

Recommended Websites

www.dcpower-systems.com
This leading wholesale distributor will answer questions about Uni Solar thin film PV and assist you in locating the nearest dealer.

www.dsireusa.org
Spells out the state rebates, loans and other incentives available for all renewable energy categories and for energy conservation.

www.homepower.com
Home Power magazine is an excellent resource for anyone who wants to learn more about solar or other renewable energy options. The Web site includes a directory of renewable energy dealers and installers.

www.nabcep.org
Find certified solar installers listed with the North American Board of Certified Energy Practitioners.

www.pvwatts.org
Determines how much power a PV system will produce at your location and lists local utility electric rates.

www.uni-solar.com
Through this site you can locate a solar installer who can give you a price quote on a building-integrated ECD Ovonics solar project.

Recommended Reading

Got Sun? Go Solar
by Rex A. Ewing and Doug Pratt
This new book by two veteran solar experts provides a clear discussion of all the basic information homeowners need in order to choose a simple, grid-tied solar or wind system.


Cheryl Long is the editor in chief of MOTHER EARTH NEWS magazine, and a leading advocate for more sustainable lifestyles. She leads a team of editors which produces high quality content that has resulted in MOTHER EARTH NEWS being rated as one North America’s favorite magazines. Long lives on an 8-acre homestead near Topeka, Kan., powered in part by solar panels, where she manages a large organic garden and a small flock of heritage chickens. Prior to taking the helm at MOTHER EARTH NEWS, she was an editor at Organic Gardening magazine for 10 years. Connect with her on .


Previous | 1 | 2 | 3 | Next






Post a comment below.

 

Elizabeth
7/10/2014 5:19:22 PM
Hi, I also agree that the global warming is just another occasion to make the business running, sell CO2 limits, simply to make money. Nevertheless, I think we should go more green and start to use better solutions - the renewable sources energy, just because our supplies of coal, to name one, will run out. The prices of imposing a pv system are decreasing, we can also do it ourselves, there are more tools to do it accessible than were before, like apps help you with the whole process, gather data and provide you with financial analysis (here's one: http://easysolar.co/ ), which, to be honest, is essential. One of the main reasons for installing solar panels is to save money, right? So, I hope people will become more eco-friendly for the good reasons.. Elizabeth

Matthew Groff
7/1/2010 12:56:04 AM
Hello everyone! Another reason to go Solar, if power goes out due to bad weather or some other reasons like: A vehicle hits pole and knocks the wires down, Overloaded circut at power company causes blackout, etc. Then only those with generators or solar power will have electricity. But those with solar power will have more, depending on the type of system they have compared to those with a generator. Plus do not have to worry about filling up a generator or running out of fuel or fuems from the exhaust of the generator's engine possibly getting into the house.

Barney Five
11/29/2009 1:04:48 PM
I am very much interested in solar power but it has to do with the economics of the situation. No doubt this article and hundreds like it went to press before the recent revelation that global warming is a hoax, and a lot of "scientists" have sold their souls to politics. I certainly have nothing against being frugal and conserving all the energy I can to protect my pocketbook, but listening to all this balderdash about global warming for the last twenty years has had me shaking my head in disgust and disbelief that people can be so gullible.

Al_5
9/5/2008 12:25:33 PM
The article mentions that thin films work best in warm temperatures. How well do they work at lower temps? My winters get down to -30F.

grrice
8/11/2007 2:21:27 PM
I have come up with a Method, to produce Electricity that will out produce Flat Panel (from 10 or 12%, to 60 or 70%) from 2.9 watts per Sq. ft., to 20 or 25 watts per Sq. ft.. What I need to know is, how much would 40sq ft of Thin-Film Laminate cost me? Or do I need to buy a larger amount, in order to get a good price, and get instructions on the application? God Bless and God Bless America George

Jane_26
8/4/2007 7:22:57 PM
I am very interested in the thin film PV which can be applied to metal roofing. I am building a new house in Florence, Oregon and have been unalble to locate the material used in the article " Easy Solar Power". Can you ask Heckeroth where It can be obtained for the home owner and can it be used on a hip roof? I have searched the internet and only been able to locate it for large comercial applications. Mother responds: You can reach the company at www.dcpower-systems.com

Dharsh
3/12/2007 2:04:42 PM
I haven't browsed though you web site but I noticed that when the page loaded there was a pop-up box requiring me to respond by filling out an application or click nothanks just to get rid of the box. I was so iritated by this box that I decided I will do anything to get rid of it. so i clicked not interested. Here is the problem. You are forcing people to make a decision when they haven't had time to decide if they are interested in the contents of your site. So if you want people to register their contact info on your site introduce the pop-up a few pages into the site and don't make it interfere with the view of the page in such an obvious way.








Subscribe Today - Pay Now & Save 66% Off the Cover Price

First Name: *
Last Name: *
Address: *
City: *
State/Province: *
Zip/Postal Code:*
Country:
Email:*
(* indicates a required item)
Canadian subs: 1 year, (includes postage & GST). Foreign subs: 1 year, . U.S. funds.
Canadian Subscribers - Click Here
Non US and Canadian Subscribers - Click Here

Lighten the Strain on the Earth and Your Budget

MOTHER EARTH NEWS is the guide to living — as one reader stated — “with little money and abundant happiness.” Every issue is an invaluable guide to leading a more sustainable life, covering ideas from fighting rising energy costs and protecting the environment to avoiding unnecessary spending on processed food. You’ll find tips for slashing heating bills; growing fresh, natural produce at home; and more. MOTHER EARTH NEWS helps you cut costs without sacrificing modern luxuries.

At MOTHER EARTH NEWS, we are dedicated to conserving our planet’s natural resources while helping you conserve your financial resources. That’s why we want you to save money and trees by subscribing through our earth-friendly automatic renewal savings plan. By paying with a credit card, you save an additional $5 and get 6 issues of MOTHER EARTH NEWS for only $12.00 (USA only).

You may also use the Bill Me option and pay $17.00 for 6 issues.