First of all THANK YOU for following up on your original post. It's nice to for once not follow footprints leading to an abyss.
Regarding funky electronics behavior and gensets. A non-inverter genset MUST be allowed to start, spin-up and stabilize its speed in order to stabilize frequency more or less at 60 hz. Then and only then, should a switch be thrown putting the unit on-line. If a succession of loads are to be applied, the HEAVIEST load (the highest wattage usually a motor) must be started first, then a progressive adding of loads, the second greatest the the third, etc. This is normal genset protocol from 200 watts to 200 megawatts. Utilities, also have a protocol they use when putting a generating plant on line.
What happens when you OOOPS overload an inverter generator by not observing this protocol. So solly chally, you got yourself a SQUARE WAVE inverter. Even the megawatt DC system will revert to square wave if it is overloaded. But you can bet the buttons on your britches the safely shunt overload relays are going to go C-L-A-C-K !!! at 55Hz.
