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OK you tech geeks out there who like to build your own stuff, you must have considered building your own or shopping for used solar panels by now…. Why buy used solar panels?  If you are trying to save money on your residential solar electricity project, used solar panels may be a good investment.  Not only can they keep your initial cost low, but you will also be decreasing the waste at your local landfill by recycling.  But not all used solar panels can be effectively reused, so here are some tips to keep in mind before you buy. 

What to look for when buying used solar panels 

The ideal used solar panel can look almost new.  The glass will be clear, dry and intact with no cracks or holes.  The frame will be square and sturdy, and the solar cell connections will be securely soldered.  Older panels will typically be larger and heavier than the newer models that output the same amount of electricity.  But if the used panels are in good shape, the lower price will offset any size or weight disadvantage. 

Check the electrical output from used solar panels 

Don’t rely on the electrical output printed on the factory label.  Instead, use a multimeter and check the panel in direct sunlight to find out what its real output is.  The capacity for solar panels that have spent their lifespan in direct sunlight tends to degrade over the years.  But the decrease in output may not be significant.  A panel that is rated at 22 watts might only produce 18 watts after 20 years in the sun.  But if the price is right and the capacity is enough for your project, it could still be a good deal. 

Where to find used solar panels 

The best source of used solar panels will be one that is close enough that you can visit in person to inspect the panels for damage and electrical output (dig through Craigslist).  Also, try (more…)

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This was fun.  A beautiful day on a roof of an Eichler home in San Jose (off Meridian and Curtner).  I met up with my friend Jarom Ferriante and learned a few cool things about solar panels and foam roofs.  This is a home of a crafty clay artist – Harriet, who’s art is shortly featured in the video as well.  Hope you enjoy!

Jarom can be found on: www.dura-foam.com
More of Harriet’s art is featured on her website: www.AcrylicAndClay.com

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These are the tips that keep coming up from a few solar pros in the community.  They can be common sense but tend to be overlooked by most folks who are pondering installing a solar panel system:

1. You can save money by learning about solar energy yourself

Now that solar panel parts are readily available for purchase on the internet, it really is possible to save money by building your own solar panels.  Build a few to power small battery powered electronics equipment like your laptop and cell phone.  Use those project to learn about how solar energy works, and to find out if you enjoy the process enough to tackle building them on a larger scale.  If you find you enjoy building solar panels, design a system for larger scale solar energy applications. 

2. Solar energy systems are scalable 

Many people think that in order to use solar power in their homes that they have to build and install a complete solar electric system that will supply all of the electricity that they now use.  But that’s simply not true.  You can start off by using smaller solar panels to power outdoor lighting or to light the inside of your garage.  Or you can install a small grid-tied solar panel system to offset part of the electricity that your family uses on a daily basis to cut your energy costs and reduce your carbon footprint.  Later you can add more solar panels and eventually generate enough solar electricity to be energy independent or even sell electricity back to your local utility company. 

3. Do an energy audit before you (more…)

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Here is a great example how one can take an older home and make it more energy efficient with an element of smart design.  These home owners in San Jose could have built this sun room addition in an old fashion way but instead, they decided to incorporate a passive solar element that not only made their home more comfortable but also chipped off a few bucks off of their energy bills.  You will also learn a few more benefits of a cool roof and see a couple of them in action.

The technical info is fun and educational, however, your favorite part might just be the very end, where Sigmond shares a message with us all from his heart.  Enjoy.

If you have any questions for Sigmond feel free to leave a comment here or give him a call direct at 408-353-6727.

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Many of us have had a relationship with the stock market of some sorts at one time or another.  Maybe you had more luck but when I bought into the hype in 2001 and lost a chunk in one week, my enthusiasm evaporated like the morning’s dew.  Then I came across a statement by Scott Case from EnergySavvy that read: “Home Energy Retrofits are 3.5X More Valuable Than Microsoft Stock: The 5-Year Payback on Home Energy Retrofit vs. Buying Microsoft Stock.”  Hmmm… given the previously disappointing outcome with the stock market, this sounded like an interesting proposition so I asked him to elaborate for us all here:   

“To illustrate the impact of doing a home energy retrofit as an investment, here’s a simplified example. Let’s say 5 years ago, a homeowner in Philadelphia named Julie was deciding between buying $10,000 of Microsoft stock as an investment or spending that same amount of money on a home energy retrofit to reduce her utility bills. What would have been the better 5-year investment?

The Microsoft stock worth $10,000 in May 2005 would have turned into just over $12,100 five years later (a return of 21% over 5 years), including the increase in stock price and the dividends paid out over the course of the 5 years. But it turns out that (more…)

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When many of us think of a solar home we normally envision a specially designed, carefully crafted construction .  Hardly ever we can think of a modest 1,200 square foot tract home in South San Jose as being a model for passive solar benefits that almost all of us can achieve.  This is exactly what Frank Schiavo did when he retrofitted his 1978 home to harvest our greatest energy source – the Sun. 

Frank was an extraordinary man.  He was an enthusiastic passive solar home consultant, environmental educator at San Jose State and an avid social change advocate.  One of his most fascinating qualities was that he produced no trash.  That’s right; he composted everything and never bought anything that he couldn’t recycle.  He even stopped paying garbage bills to the city which was a highly controversial and highly publicized move.  Gotta love this spirit of sustainability! 

Unfortunately Frank passed away very unexpectedly last January, just a week before we planned to meet, but he leaves his solar legacy behind for all of us to marvel at and learn from.  He really wanted to use his house as a way of teaching others about benefits of a green solar home “on a budget”. 

As a very tiny way of repaying his years of kindness to the community I would like to share with you some of the things that Frank was able to accomplish in his home (more…)

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We all love a good myth. “Goldfish have a memory of only three seconds”, “Water drains backwards in the Southern Hemisphere due to the Earth’s rotation”, or maybe “A dog’s mouth is cleaner than a human’s”.  It’s all fun stuff until we actually spend cash on things that we thought will do us good but end up to be a complete waste of money.  This may come us no surprise but some very commonly believed energy upgrades seem to be just that – myths.

Rob Moddy is a fellow USGBC member who often whips out a masterful blog entry.  It’s just so hard not to share this one with you.  Here he highlights a talk given by building scientist Michael Blasnik at the Department of Energy’s National Weatherization Training Conference, particularly the problems with inaccurate computer models in determining weatherization strategies and effective home energy improvement measures. 

As originally posted on GreenBuildingAdvisor.com, this is a list of common strategies for home weatherization that don’t save much energy. If you don’t want to waste your time and money, these are the strategies to avoid or closely evaluate: (more…)

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When most people think “green” homes they imagine solar panels and fancy energy saving gadgets.  It doesn’t have to be this way.  We invite you to explore with us a passive solar home in Saratoga (Bay Area) designed by a local architect Hari Sripadanna.  The home has achieved a LEED Gold rating and truly stands as a model for sustainability in our community.  After all, Hari bought parts of his house on Craigslist! 

Obviously, we could not cover all the fascinating details in the video so if you want to learn more, please read Hari’s comments and see design plans right below the video.  Enjoy.

by Hari Saripadanna (parts of the article was originally posted on the GAB Report):

With increasing popularity of green building and passive solar design, it is important to understand that sustainable design is more than a collection of credits. The key is to create synergy between building systems and practices that multiply each other’s benefit. One can create more value simply by choosing two or more complimentary sustainable design elements that play off of each other. The combined effect is more than the benefit when these design elements or systems are used alone. 

I would like to share with you some synergistic concepts used in the design of my house and show you how (more…)

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Not sure how you are going to react to this but when I saw the below image and realized what’s going on I was shocked.  And not by electricity but by the fact how much of it is wasted on the way to our homes.  

Take a look yourself at the illustration below produced by the National Academy of Sciences.  It shows how out of every 100 units of electricity produced by a coal energy plant only 2 is used to light a table lamp that is illuminating your keyboard and that cup of tea.  The rest of the 98% is lost at the power plant, transportation, and heat.

PG&E claims the main source of energy for Bay Area homes is nuclear and natural gas but how much are these plants more efficient than coal?  Chime in if you know in the comments.  Let’s just really hope the efficiency is exponentially higher.

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Have you heard about the many rebates, incentives and tax credits available for you now or in the near future?  It’s been all over the media, and you might have heard about it from the President himself – Energy Efficiency in our homes is critical for a sustainable, healthy and fruitful future. In fact he called it “sexy.”  Way to go Mr. President! 

According to a memo by the President’s Economic Recovery Advisory Board,

 “There are 100 million homes in America, and energy-saving measures like insulation, caulking, and heating and cooling system upgrades can reduce household energy consumption by 10 percent to 40 percent.” One little problem… Who’s really going to cough up all this hard earned cash these days to make their homes more “green”? 

Now, it’s safe to say that there are plenty of DIY projects for homeowner to get started on, i.e. programmable thermostats, smart power strips, CFL lighting, low-flow shower heads and faucets etc. but, to attack more than these items and gain greater energy reductions typically requires professional services; and it’s not cheap to retrofit a home. 

For example, some of the services that are typical of a home retrofit would require (more…)

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