Running at half load, the engine of this 182-pound, 5,500-watt, wheelable generator can turn five gallons of gas into 10 hours of uninterrupted power. It has four 120V household outlets, one 120/240V outlet, and a locking 30A outlet for heftier appliances, making it easy to connect most plugged-in necessities. [$700; briggsandstratton.com]