Problems with ThermoKing Legacy 650 APU

So an update: I've also been having another issue which it suddenly occurs to me could be related. Been getting water dripping out from the visor area or above the doors sometimes during turns, and water seeping up from the floor pretty much all the time.

I had a company Cascadia awhile back that had the same type of thing. It turned out that some of the roof insulation had come loose and water would condense where the insulation had been, and then work it's way down and collect and start to work it's way into the cab.

So now I'm wondering if my current water issue could be caused by something similar, and also if it could be causing these electrical issues. Be nice to kill two birds with one stone, but I seem to recall that it wasn't an easy repair.

 

Update:
Went to Texas Truck AC some weeks ago and was overall very pleased, although not all my issues got fixed. They did fix a bad mount, a freon leak and a coolant leak, but they weren't able to reproduce the issue with the slow start and I didn't have them look into the electrical. I also went to the dealership in town and got a windshield leak fixed, though it's still too early to tell if that stopped all the water intrusion, but it definitely stopped much of it.

Another mechanic recently alerted me to the notion that the blowers (I'm assuming there's 2) should not be running unless the APU motor is also running. Ive been testing this by shutting the whole system off as soon as it finishes charging instead of leaving it with the blowers going. Sure enough, a single charge from the APU is enough to power the inverter for several hours plus the bunk heater all night. But if the blowers are left running, it won't last an hour before needing another charge, even if the other stuff is off.

So now I'm working on the theory that it's the nonstop running blowers and the resulting repeated cycling of the batteries that is what is causing them to die so quick. So I will be heading back to Dallas soon to see if there's some sort of blower switch or circuitry they can look into.