On my '95 Royale we used to be able to run the front roof air and/or the microwave off the inverters. 2X 2500 Heart. On our last trip when we were not running the gen, the microwave wasn't powered up while running off inverter power. The batteries were '01 vintage so I bought & installed new AGM's. Still no power to microwave or roof air, but everything else works as it should (I think). I noticed that the converter charger wasn't working/humming as usual so I checked the outlet it was plugged into & it had no power to it. No blown fuses either. So I plugged it to extention cord and it is now working. After 4 days of charging, still no inverter power to microwave. Where do I start??