I have this in use daily you bet, you can checkout my videos of it in action. I am in an off grid situation, so the gen input is my smart loads output, which I have hooked up to a sub panel, it powers some outlets, and a hot water heater right now, my elec tank is before my boiler fed tank so when the sun is shining and batteries are full all hot water loads for the house are met. I have my generator hooked up to the grid input on the sol ark, but I do not use it. I don't like the way my generator power makes all the lights flicker in the house, and this is understandable, current cannot flow in two directions in the same wire so the generator has to handle house loads and charging, which causes electronics to be stressed out. So I used a spare growatt 5000es as a charger only, this way my generator feeds the growatt as charger, and lets the solark continue to only handle battery, pv, and house loads at a rock solid 60hz with reliable power.
In the next two weeks will be the test when I actually need generator for my new setup, haven't used genny since last Christmas other than to exercise and keep the fluids moving. My undetermined experiment is the following: Leave the two wire start hooked up to generator from sol ark where the signal for low battery comes from, but feed power to the growatt instead of the sol ark. I don't know if the sol ark will be smart enough to notice there is no power coming in and then shut off the genny, there is a loud audible contactor or relay sound from inside the sol ark after 30 seconds of warming up that if it doesn't sense power, unsure of what the sol ark will do.
