Yamaha EF4500iSE Inverter Generator vs WEN 56400iX Inverter Generator

Buy the Yamaha EF4500ISE if you need to run a 30-amp RV air conditioner, a transfer-switch circuit, or sensitive electronics at full load for hours; its 4,000-watt continuous output, 357cc engine and 4.5-gallon tank are built for that. Buy the WEN 56400iX if you want a light, wheeled unit for tailgating, camping or short home backup, and you value the CO shutdown sensor and fuel shutoff. The Yamaha is the heavier-duty machine with a longer factory warranty; the WEN is far easier to move and rates well with owners, but it is a residential-grade unit with lower continuous output.

• Choose the Yamaha EF4500ISE if you need 4,000 running watts, a big tank for long sessions, and a brushless inverter built for commercial or full-time backup duty.
• Choose the WEN 56400iX if you want a quiet, wheeled generator you can lift into a truck bed, with CO shutdown and fuel shutoff for safety and easy storage.