Posts Tagged ‘solar energy’

Homemade Solar Electric Panels – What’s the Cost?

Saturday, February 6th, 2010

If you wonder what’s the actual cost of a homemade solar panel, keep reading! The cost of commercial solar panels have an average return of the investment of ten years. So in about five to ten years you should be able to recover your initial investment due to lower electricity bills.

This figure will vary greatly depending on:

  • The quantity of power you consume
  • The location of the solar electric panels on your roof
  • The amount of sun exposure you have

Also different states around the country offer different incentive programs and rebates for the purchase and installation of solar panels. You may call your local building department to inquiry about their programs. It may well save you thousands of dollars.

The amount of solar panels you may need is actually not depending on the size of the building (as it may seem at first) but on the electricity you consume. Therefore the first step would be to get your last electricity bills (up to a year to have a better calculation), add the total kilowatt hours from the utility bills (kWh) and divide it by 1930.

This formula will give you a quite approximate size in kilowatts of the photovoltaic panels you will actually need. Commercial systems cost from %5,000 to $9,000 per kilowatt installed (before any rebate)

For example: if your utility bill tells you are using 12,500 kWh per year and your cost is $1,800/year:

12,500 / 1,930 = 6.47 kW. That means you will need a system able to generate 6.47kW

And that system would cost you: 6.47 kW * $7,000/kW = $45,290 (taking an average installation value of $7,000)

With a 30% rebate your bill would be reduced by $13,588 and you would have to come with $31,703 (out of pocket). If you then factor tax credits you would have to end up paying around $16,000

And since your yearly cost is $1,800 you will have paid for your installation in ($16,000 / $1,800 = 8.8 years)

You should take also into account the physical space needed to install the system:

To generate 1kW you may need a bit less than 100 square feet of solar panels, So for 6.47kW you may need around 600 square feet of roof space. But if you can’t afford a commercial solar electric panel installation you may look to other valuable alternatives like DIY photovoltaic panels.

There are plenty of books and eBooks around that can help you in this task. Just take the time to analyze your best option and go for it!

If you would like to learn more about solar electric panels or photovoltaic solar panels just visit my site.

Solar Home Improvements Without Panels

Monday, October 5th, 2009

You’ve grown tired of paying monstrous electric bills and have decided to go solar. Solar panels, however, aren’t exactly your taste. Don’t worry, you can go solar without them.

Solar panels are used to convert sunlight into electricity, which can be used to light and heat a home. They are not, however, the only method for accomplishing these goals with the sun. A simple experiment you can try in your driveway will show you why.

Park your car in a sunny spot on your driveway. Get in, mark the time, close the vents and roll up the windows. It starts getting pretty warm pretty quick, eh? You’ve just experience a concept known as direct gain energy. The power of the sun is more than sufficient to create heating and lighting if it is manipulated to hit your home in the right way.

Direct gain is a concept that has existed for thousands of years. Before electricity was in abundant supply, ancient societies planned entire structures around the concept. You can learn from their experience.

The first rule of direct gain is to focus on the south facing side of your home. In the Northern Hemisphere, the south side of any structure will receive the most sunlight during the year. If the sun is not striking the south side of your home, you’re going to need to move some trees and what not. Failing to do so will kill any direct gain heating options you have available to you. The sun must have a clear path to the south side of your structure or you can stop reading this article.

Once gardening issues are resolved, you need to take a close look at the surface areas. Much like a car, it is important that the sun has a method for penetrating the exterior of the home. The primary issue concerns windows. Are there any and, if so, how big are they?

The easiest method to generate solar heat in your home is by placing large windows on the south side of the home. Home Depot, here we come. To truly maximize the effect, you should also have two additional components.

The first is a fan system that will help circulate air out into the rest of the home. The temperature differences from room to room will eventually equalize, but a few ceiling fans can help.

The second issue to consider is your flooring. Windows are great and all, but what happens when the sun goes down? No more sunlight and no more heat. To overcome this problem, you can make improvements to the flooring below the windows. Yank up the carpet and put in some material that soaks up the sunlight. Certain ceramic and masonry products will hold significant amounts of heat. As the sun beats down on them, they slowly heat up during the day. Once the sun sets, they start giving off heat which allows you to maximize your passive solar system.

While this strategy will not replace your traditional heating costs, it can act as a supplemental system to take care of heating issues during the day and early evening. Break out your hammer and you can cut a chunk out of your utility bill!

Rick Chapo is with SolarCompanies.com, a directory of solar energy companies. Visit us to read more articles on solar power and renewable energy.