Claim: A photovoltaic system is a solar power system designed to supply usable solar power and in 2013 it was most affordable in Australia and China.
Evidence: A photovoltaic system, also PV system or solar power system, is a power system designed to supply usable solar power by means of photovoltaics. Residential 1.8 Commercial 1.7 Utility-scale 2.0 1.5 1.4 1.4 4.1 2.7 2.2 2.4 1.8 1.4 2.8 1.9 1.5 4.2 3.6 2.9 2.8 2.4 1.9 4.9 4.5 3.3