Questions About Solar
Frequently Asked Questions About Solar Photovoltaic and Solar Thermal (Hot Water) Systems Q: What is photovoltaics (solar electricity) or "PV"? A: What do we mean by photovoltaics? The word itself helps to explain how photovoltaic (PV) or solar electric technologies work. First used in about 1890, the word has two parts: photo, a stem derived from the [...]