Our 7.4kW PV system supplies all our electricity. We eliminated all natural gas use on our property (and had SDG&E close our gas account!), so the house is zero emission. Our hot water is supplied by a Rheem heat pump water heater (UEF=3.55!). We bought all-electric cars so our local transportation is zero emission, too. Two Tesla PowerWalls provide backup to the entire house.
The home of the future is an all-electric home (powered by solar)!