Originally Posted by Hallen01
So specifically is this how you run the test:
- Start engine
- Press and hold "Emergency Start"
- Emergency Start switch blinks: house batteries are above 13.3v and not linked to the alternator (along with the chassis batteries)?
- Emergency Start switch glows steady: house batteries are 13.3v or below, and have been linked to the alternator (along with the chassis batteries)?
So then the chassis batteries or a FR Berk are always
on charge from the alternator if the engine is running?
I really doubt that is the procedure. Start the engine, if the emergency start switch glows that means that the BCC has already connected the house to the chassis and that the system voltage is above 13.3 (that is the reason why the BCC connected the two banks!)
On my past rigs, if you hear the solenoid click when you press the emergency start switch, the solenoid wasn't engaged. When you run the engine and for at least a minute after you shut down, when you press the switch you won't hear the solenoid "clunk" since it was already engaged by the BCC using the 13.3 volt system voltage.
Now, as far as the inverter discharging the batteries during a long drive, that just shouldn't be possible if the alternator was charging the house. I would bet that you have at least a 175 amp alternator and that would mean that the inverter was supplying more than 2,000 watts of AC all the time you were driving. Even a really big residential refrigerator only draws half of that and it only runs 4 or 5 minutes out of each hour anyway.
Virtually all modern RVs charge the house with the engine whenever it is running (MB Sprinter aside.)
Your coach is trying to tell you something...