Michael Davis of Arizona has always had an interest in renewable energy. Last year he needed a way to provide electricity in a remote location and learned that used parts found on eBay can be used to build a solar-powered electric generator.

The potential benefits of solar power are well known - lower cost, less dependence on other natural resources, etc. The main drawback has been the initial expense - mostly in the cost of photovoltaic (PV) cells required to convert sunlight into electricity.

Michael knew that damaged or blemished PV cells were available on eBay and purchased some, not sure if they would work. This is what he learned when he used them to build a solar-powered electric generator:

* Less then perfect cells can still perform efficiently.
* They are just a fraction of the cost of new cells.
* They are readily available on eBay or from other sources

Steps in Building Your Own Solar Panels

If you are handy with tools, you can construct your own solar-powered generator following these basic steps:

1. Determine How Many Cells You Need
You'll need to decide whether you want to produce enough power for your entire home or just power a few items such as lights or small appliances. This will help you determine how many cells you need.

2. Purchase The Photovoltaic Cells
eBay is a good source for used or blemished cells, but you might also ask the cell manufacturers or contractors that install panels if they have used or damaged units. Be aware that all PV cells are not alike and have different performance ratings

3. Connect The Cells Together
If the cells are not already connected together, you will need to connect them yourself. This is done by laying them out in the desired pattern to fit into the panel described in the next step. You then use solder and metal strips or wire to join them together.

4. Construct Panels To Hold The Cells.
The solar panel is nothing more than a shallow box typically made out of wood. It needs to be large enough to hold your cells, but don't make it too large or you'll have trouble carrying up to your roof for mounting. You can have many panels, all connected together with wiring.
 
5. Assemble And Install Your Panels
Place your completed solar cells inside the panel, running the wires out through holes. Then cover the panel with Plexiglas. This will increase their efficiency and make the whole system more weather-resistant. Finally, test the panel under the sun using a multimeter.

6. Install Your Panels
Most homeowners mount solar panels on the roof, but they can go anywhere that sunlight is unobstructed. Face them southward if you live in the northern hemisphere.
 
7.Connect Your Panels To Your Home's Electrical System.
To complete your project, you'll need to run wires from your panels to your home's electrical system. Here are some additional items you will need:
 
* Inverter - to convert power from DC to AC
* Emergency shut-off switches
* System monitor and Battery back-up (optional)

Depending on your level of expertise, you may need professional help to complete portions of this project. Then you can begin enjoying the benefits that solar energy offers.

About the author: John Horning specializes in reporting on solar and wind energy. <a href="http://">Learn more about building a solar powered system for your home</a> on his website, www.DIY-Solar-Power.net</a>.