PV SIS is a term commonly associated with solar energy, specifically photovoltaic (PV) systems. The spelling of PV SIS phonetically is /ˌfoʊtoʊˌvoʊlˈteɪ.ɪk ˈsɪstəm/. The word "photovoltaic" comes from two Greek words, "phos" meaning "light" and "voltaic" meaning "electricity." A photovoltaic system is simply a technology that converts sunlight into electrical energy. PV systems have become increasingly popular in recent years due to their eco-friendliness and cost-effectiveness. These types of systems are ideal for homeowners and businesses looking to reduce their carbon footprint while also saving money on energy costs.