Solar PV power systems are a fundamentally different type of technology than traditional fossil and nuclear fuel heat-based generators, such as steam turbines, gas turbines or internal combustion engines, which are fueled with coal, natural gas, or nuclear. This sometimes causes confusion when discussing costs and performance, especially when trying to compare PV systems to traditional fossil or nuclear generators. This Solar Lexicon provides explanation of Solar PV technical terms to assist cooperatives in understanding the technology and impact to our industry.