Do you have an inverter? Mine has a 115 pass through circuit. The power for A/Cs actually comes out before the inverter. Then the A/C goes into the inverter and just passes through. I'm guessing that it does that so that the inverter, when on, doesn't power the A/Cs. On mine there is also a 115 outlet or two that are not powered by the inverter.If it were my set up I would be looking for a 115 outlet that also does not work while powered by shore or gen. If thats the case I would be looking for a fuse or breaker that is before the power goes to the A/Cs, like near the transfer switch if equipped. I am not an expert so take what I say with a grain of salt. I hope I've helped and not confused. Good luck.