Meet the Briggs & Stratton Power Smart Series P2200: a power generator that comes with a quiet, fuel efficient engine for your electrical backup needs. Its smart engine adjusts its speed to provide you the proper amount of power. 1 gallon of fuel will provide you with up to 6.5 hours of continuous operation.
The device has a parallel connector port, so you can connect multiple units for more power. There is also a USB port to charge portable electronics. You can get yours here.