Cummins Onan QG EVAP Gasoline powered 4000 watt RV generator. Perfect lightweight, compact and quiet, perfect for travel trailers, truck campers, and folding camping trailers. Runs one air conditioner (up to 13500 Btu) with a 2000 watt baseload, power to spare. Features: Microprocessor control with diagnostics Exceptionally smooth, qiuet operation Full housing with enclosed muffler Lightweight, compact OHV engine for efficiency. Evaporative Specification: For trailer applications required to meet CARB Tier III Evaporative Emissions and EPA phase 3 standards.