I have the auto throttle or idle control or what ever they call it, on a couple of small portables.
It will only idle down if there is no draw on at all, even if you turn on the smallest light it speeds right up to 3600 rpm's
Comes in handy on a construction job where you might be using power tools intermittently, so the genny is not racing away with no load on it. But I don't see how it would help as a home back up machine, where there's always gonna be something on, else you wouldn't be running the generator.
Unless it's some new technology I'm not aware of, where the machine can still put out stable power at varying RPM's and loads.
Are the new inverter types capable of that?
JB.