Inverter generators electronically throttle the engine up and down to meet demand, instead of running full tilt all the time as traditional generators do. This less-than-full-power operation makes them both more efficient and quieter.
“An inverter generator only ramps up as high as it needs to,” says David Trezza, the Consumer Reports engineer who oversees our generator testing.
An inverter’s extra efficiency means you won’t have to fill up the gas tank as often, which could be useful if fuel is scarce after an emergency. Inverter generators also produce lower emissions than conventional models, though you still need to take the same safety precautions by running them outdoors and well away from any dwelling.
Their longer run times and lower noise, along with their smaller size and lighter weight, make inverters much better suited for recreational use, such as camping or tailgating.
Inverter generators tend to deliver power that’s “cleaner,” with more consistent voltage, which is reflected in the power quality test in our ratings.