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Old 06-19-2020, 12:22 AM   #2
Pete'sMH
Senior Member
 
Brand: Thor Motor Coach
Model: Forest River Forester 235
State: Indiana
Posts: 4,883
THOR #6826
Quote:
Originally Posted by The_Breeze View Post
Does anyone know the expected parasitic drain on the house batteries in a pretty basic/standard RV.

I have the basic equipment, nothing fancy. The usual control boards and whatever else is going on. No inverter unless I turn it on.

Reason I ask is I started with 13.04v after a gen run. I let it sit 5m and took a reading. The RV sat for 3.5h and volts dropped to 12.69. Trying to understand where the .35v went.

Thanks.


Well I’m no expert but I believe 12.7V is the textbook full charge reading. Immediately after charging there is a little bit of surface charge that needs to dissipate. Sometimes you’ll see instructions to turn the lights on for a moment before checking the voltage to do this very thing. In your case it was just the passage time. I think you’re fine. To be sure you can check it again in a day or two and it should still be close to the same.
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