Most solar-powered houses built

The most solar powered houses build by one company is 180,126, achieved by Sekisui Chemical Co., Ltd. Housing Company (Japan) from 1 April 1997 to 31 December 2016.

All houses counted for this record have been built by Sekisui Chemical Co., Ltd. Housing Company, with their solar power units either pre-installed or post-installed once the building had been completed. For the purposes of this record, solar-powered houses are residential houses installed with a solar-power generation system which may include solar panels and power distribution boards. Residential housing is defined as a building made for a purpose of housing where people live (in a household).