The Yamaha EF2000iS Portable Generator is Lightweight, quiet and powerful. Charge batteries to extend boondocking adventures, and produce back-up power at home for emergencies and blackouts. EF2000iS will power most RV appliances with ease and delivers maximum output with minimum effort. A visible fuel gauge allows the fuel level to be seen at-a-glance so you know when the generator needs to be refilled. Gasoline petcock lets you shut off the gas to run the carb dry for storage and helps prevent stale gas problems. Features a built in Oil Watch Warning System that will prevent engine damage from low oil and provides an added peace of mind. The EF2000iS is fitted with Yamaha's most technologically sophisticated muffler. Its so quiet that you can have a conversation near one and may not realize it is running. If you need extra power, the Yamaha portable generator has a convenient parallel function lets you connect two generators together to deliver up to 30 maximum amps of power. EF2000iS will power most RV appliances with ease and two generators will provide enough power to run the air conditioner for hours a day.