Cerbo GX Mk2 start-stop Onan RV QD 8000 Genset with No other relays

[OGPS (Ed @ Off-Grid Power Systems - offgridps.com)]

You won’t fully load up the generator with a single (or even two) of the 12/3000 2x-120V inverters, but two in parallel would do better than one. See this thread here that was recently posted: Upgrading my Motorhome from 12v house batteries to 48v batteries