Questions and electrical advice in the Solar PV Forum | Solar Panels Forum - All questions relating to Photovoltaic & Solar Panels in this forum, including feed-in tariffs, inverters, panels, calculations, schematics, installation, maintenance & fault finding. Solar panels forum. Solar forum. Solar talk. A photovoltaic system, also solar PV power system, or PV system, is a power system designed to supply usable solar power by means of photovoltaics..