BTS - Photovoltaic Systems Photovoltaic Systems Photovoltaic cells, or solar cells, convert sunlight directly into electricity. Photovoltaic systems use large panels comprised of many solar cells connected together to work in unison. The photovoltaic panels are usually mounted on the roof of the house, preferably on a south-facing slope. Skylights can incorporate photovoltaics to create a pleasing appearance while generating electricity.
Most homeowners prefer systems without battery storage that are connected to the power grid.
In some states, electric utilities will allow the photovoltaic system to add electricity back into the power grid when the system is producing more electricity than is being used in the home. To extend the economics of photovoltaic systems, and to make their use in buildings more appealing, new products that integrate photovoltaic cells into building materials are now coming on the market. Colored skylights, awnings, and even roof shingles are now incorporating photovoltaics, allowing them to generate electricity while serving a purpose in the home's exterior. The roof shingles, for instance, look nearly identical to asphalt roof shingles and will serve the same purpose, while also generating electricity. Photovoltaic shingles look similar to asphalt shingles and provide the same protection for your roof while they generate electricity.