Japan’s largest oil wholesaler plans to install rooftop solar panels and gas-powered fuel cells to supply electricity to condominium units. The system is estimated to provide 80-90% of the electricity the units need.

The rest will be supplied by JX Nippon Oil subsidiary Kawasaki Natural Gas Generation Co., which has a generating capacity of 847,000kw and produces high-voltage electricity for corporate users. Electricity generated by the subsidiary will be sold to households for 5-10% less than major power companies charge, with JX Nippon Oil acting as a seller or PPS (power producer and supplier).