according to a report on behalf of the european commission the united kingdom had 2,499 mw of residential solar pv capacity with 775,000 residential solar pv prosumers in the country representing 2.7% of households as of 2015. the average size of residential solar pv systems is estimated to be 3.25 kw moving to 2030. the technical potential for residential solar pv in the united kingdom is estimated at 41,636 mw. the average payback time for residential solar pv in the united kingdom is 11.4 years as of 2015.