Generac GP4000i Inverter Generator vs Yamaha EF4500iSE Inverter Generator

These are different classes of machine. The Generac is a big open-frame dual-fuel unit rated around 7,500 running watts and 9,400 starting watts, built to back up a house or run heavy tools. The Yamaha EF4500iSE is a quiet inverter rated 4,000 running and 4,500 peak watts, meant for sensitive electronics, campers and job sites where noise matters. Buy the Generac for whole-home backup and big loads; buy the Yamaha for clean, quiet power and portability. Owners of inverter units like the Yamaha praise the stable sine-wave output and low noise; open-frame units like the Generac draw praise for raw capacity and dual-fuel flexibility, but they are loud and heavy.

• Choose the Generac GP7500E Dual Fuel if you need to run a furnace, well pump, refrigerator and lights during an outage, or power large tools, and you want the option of LP gas.
• Choose the Yamaha EF4500iSE if you need clean, quiet power for electronics, a camper or a small job site, and you value a long factory warranty over raw wattage.