CMCK04:
My Apollo oven quit suddenly on my trip from Sacramento to Goshen, In. As I closed the door, before I started microwaving, all lights suddenly went out on the microwave. Being a retired electronics tech., I think that something is wrong with the door microswitches which blew the internal fuse in the microwave. I made an immediate run to the nearest WalMart and got a small, tabletop, microwave for about $70 to at least use on the trip. Of course, I did check, and reset (it wasn't tripped) the main circuit breaker for the microwave first. I will have to evaluate repair/replacement of the convection microwave when I get home. There are issues of fit, trim bezel, and cooling ventilation to consider if you are going to replace it. Heartland service might be able to advise you on this and supply you a bezel used with whatever convection/microwave model they currently use.
On the battery charge retention problem you will need a DC voltmeter/currentmeter for understanding the problem. The questions to ask are: Are there any 12 volt devices draining current from the battery other than the normal drain sources (L.P. alarm ). Are any lights left on like in the closet? Is your emergency disconnect brake switch tripped? Is the water pump switch left on? Next, you need to check that the circuit breaker from the converter/charger to the battery is not tripped. Disconnect your converter/charger from the battery and measure if voltage is being supplied when you are connected to shore power. You may be able to do this easily by disconnecting the positive cable to the battery then measuring for voltage at the positive cable's end. Information and diagrams on the charging system are at the "Tools" tab at the top of any forum page, then click on the "Manuals" listing, then go through the manuals menus to find what you need. The converter/charger should be putting out 13-14 volts DC.