We built a home on the side of a lake. Power is 4 km away (3 miles). Solar was our only option, so we installed a 4kW system to handle our electrical requirements. We installed a wood fired 125,000 Btu boiler in the workshop to feed a 60,000 Btu/hr load. (+\-30,000 Btu/hr house, 30,000 Btu/hr...