This Predator medium sized Inverter l generator is Gasoline-powered and is rated for 3000 watts/3500 watts surge load. includes a 30 amp RV/marine outlet. Has a 12-volt output for charging batteries, etc. It also has a digital display on board that displays voltage, amps and watts. Push button electric start and is parallel capable but lacks a fuel gauge, which tells you how much fuel is left.