The most basic definition of a photovoltaic solar shingle is a solar panel that is configured as a roof shingle that is integrated into a conventional asphalt type shingle roof. Recent advances in the efficiency of solar shingles or tiles have also led to the development of solar shingles that will integrate into shake, concrete, tile and slate roofs as well. They look a lot like a normal asphalt type shingle and protect your roof from rain like a conventional shingle but have the added bonus of being able to convert solar energy into electrical energy for your home.