3000 watt, 1 gallon tank -- This generator runs for about 2.7 hours and includes two 120-volt outlets with two circuits breakers to prevent overload. It's suitable for running power tools on a job site.

3600 watt, 4 gallon tank -- This generator can be run up to 12 hours pulling a half-load. It has two sets of 120-volt outlets and one 240-volt outlet. Includes wheels and a fold down handle for ease-of-movement. This generator is suitable for a garage shop.

6300 watt, 8 gallon tank -- This generator provides 13 hours of run time and is suitable for home power outages. It includes an electric start, wheels and locking fold-down handles. This generator will not run all of the electrical devices in your house. A power transfer switch lets you and your electrician designate what circuits to run through the breaker. The generator has a spark arrest muffler to keep it running quietly and without sparks from the exhaust.