The Freewatt is powered by Honda’s GE160EV natural gas engine and produces 3.26 kilowatts of heat and 1.2 kilowatts of electricity. Although substantially less than is generated by the Senertec Dachs, the Freewatt is appropriately sized for the needs or the average single home. Similar systems have sold over 45,000 units in Japan since their introduction in 2003. The low noise levels of the Honda generator, which is compared to a refrigerator, is a strong selling point for the Freewatt.