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Do-it-yourself solar panels generate electricity by a phenomenon generally known as the photovoltaic effect. When photons reach the surface of a doped semiconductor, a small voltage (potential difference) appears across the electrodes. By connecting several semiconductors together, we can get power large enough for everyday use. You may have realized by now that the (semiconductor) material used is solely responsible for the efficiency of energy conversion -- from sunlight to electricity. As scientists discover better semiconductors and better production techniques, photovoltaic cells become cheaper to produce. And as the demand for solar panels increase, economies of scale drives the price of solar cells to the value we know today. Recently, many hobbyists are getting interested in building for themselves homemade solar panels. This further reduces the cost of introducing a solar power generator into their house. In fact, most of them are able to gather materials from used and broken solar panels to construct fully working (restored) panels at a tenth of the original cost. However, before you commit to a do-it-yourself solar panel project, you need to consider what you'll be using it for. Beginners often start with smaller panels that they use to power their garage lights or garden sprinklers. More experienced enthusiasts often challenge themselves to generate all their household energy needs with several pieces of homemade solar panels installed on rooftops. If you want to build a grid-tied or off-grid system for your home, you will be required to size your solar energy system. Then you'll be able to determine the type and quantity of batteries to buy and the kind of inverters to use. You'll also need to cater sufficient space in your home to house these electrical items safely. Because many DIY solar panels are built from used photovoltaic panels, their efficiency may be much worse than off-the-shelf panels fitted with new photovoltaic cells. Therefore it is important to keep the efficiency as high as possible. This can be achieved by keeping the solar panels as cool as possible. Because efficiency drops as the temperature of photovoltaic cell rises. If your solar panels are installed on the rooftop, you need to ensure sufficient gap between the roof and panels so cool air can pass through to bring away excess heat from the solar panels. Another way to ensure maximum electricity production is to locate your solar panels at a place with the most sunshine throughout the year. This means the panels should be tilted toward the south (if you're living in the northern hemisphere) and there should be as little shading as possible. If your location allows you to generate sufficient energy for your household needs, you're in luck. With your own set of do-it-yourself solar panels, electricity cost will no longer be a concern as long as the sun is shining for you. You'll also experience a shorter payback period than comparable retail models simply because homemade solar panels are cheaper.

John Greenspan is an expert in DIY solar panels and has build several solar power generators in his spare time. Are you interested in building DIY Solar panels? Pick up your FREE "How To Build Solar Panels" eBook at => http://www. diysolarpanelsworld. com