The Yamaha EF2000isV2 is part of the Generator
test program at Consumer Reports. In our lab tests, Generator
models like the EF2000isV2 are rated on multiple criteria, such as those listed below.
Power delivery: How much wattage models delivered and how well they handled surges in power demand over various loads.
Power quality: A generator's ability to deliver power smoothly, with consistent voltage.
Noise: Measured at 23 and 50 feet from the generator. We recommend hearing protection for standing close by the unit while it's running.