Photovoltaic cells are semi-conductor devices that generate electricity when exposed to the sun. This type of solar technology uses the photoelectric effect and converts selected wavelengths of light into electricity.
Solar cells can be integrated in a roof as solar shingles. They are suited for home-owners who don´t want to have large solar panels on their roof. Installation of most solar shingles is easy and affordable, as they can be applied directly onto roofing felt.
Solar cell efficiency tells us the amount of solar insolation that is converted into electricity. It usually lies between 12.5 and 15%. In laboratories, scientists are working on solar cell efficiency constantly.
When installing a Solar Energy System for your home you can claim up to 30% of the cost as a solar tax credit. This includes both equipment and installation. This incentive used to have a cap of $2000, but today the credit has no upper limit.