Re: Connecting Generator and Inverter
To get a better idea of what's going on, disconnect the inverter and turn it off. There should be no voltage reading across any of its AC out. Run the generator: with the switch off, the part of your 'Y' cable that goes to the inverter should also read zero volts across any combination of the terminals that would connect to the inverter. If there is still some voltage reading or if it only shows up when the cable is connected (but switch off) then there is probably a bad neutral to ground connection or a bad Earth ground. There should be only one neutral-ground connection, and it's usually at the breaker box. Strange and not at all good things can happen if the gen has another neutral-ground or additional Earth ground.
Again, it's hard to be specific without knowing the actual over-all set up.
1220 Watts of PV, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.
Ohm's Law: Amps = Volts / Ohms
Power Formula: Watts = Volts * Amps