Battery Disconnect Confusion

DesertHiker wrote:
Okay, so I went out on Monday to take off on my first trip in my (new to me) 2018 Leprechaun, and the engine battery was dead. Had to call for a jump start. So I learned if my coach is just sitting in the driveway, I should turn the battery disconnect to OFF. (Kinda backwards .. turning a disconnect to off?)

But what confuses me is what happens if I camp without hookups for 7 or 10 or 14 days, which I often do?! How do I keep the engine battery charged so I am not calling for emergency road service in the middle of the back-country?

No, I don't have a "battery boost" for the engine battery.

Thank you!!!!

1. Get a set of HD jumper cables that reach your truck battery from the house bank , if you don't have an emergency jumper switch.

2. As said the rv shut off switch in the 'off' position controls the rv house bank not the chassis battery.
You might need to turn it 'on' when plugged into shore power in order for the modern day convertor to charge both banks, chassis and coach, that's how my 2018 FR is rigged using a 'BIM' , battery isolation manager, that monitors voltage of both banks and flip flops between the two to charge them, usually for 15 mns every 35 mns.
If the 'emergency shut off switch' is off only the chassis will charge while driving. Turn it on to charge both banks while driving.

3. I would load-test the chassis battery to see if its good or not.

When batteries discharge and sit for periods of time they tend to fizz out and lose their blood pressure.
If it is good and its discharging, put an amp meter on the chassis battery to see if you have a draw while its parked. If you have a draw, then start pulling fuses individually on the chassis to isolate the area that's causing the draw.