What batteries were low? Chassis or house? Your post implies the house batteries are not being charged. Low house batteries can cause various and strange problems.
A $10 voltmeter is your friend and can REALLY HELP understand the problem. Per your post a 15 minute charge from the alternator is a bare minimum charge as it can take several hours to get the batteries up to mostly charged. Hence the lights etc when out again.
Please post the battery voltage of both banks.
Loss of AC could be a GFCI or some other loss of AC possibly on one leg of the 50A. Again a voltmeter is your friend.
However probing AC can be dangerous and I recommend you get help for AC checking.majordad wrote:
The other day I started the coach as the batteries were low and let it run for about 15 minutes. I also Reset the a/c out 1 and 2 on the inverter and when I checked the bathroom lights, they came on. I releveled the coach and shut off the engine. As it got dark, I turned on the heater and it was working fine. Came back later to put the boys to bed and heater was blowing cold, ignition failure on the hot water heater and again no lights in bathroom..
