Checking 12V from outside the rig
My RV is parked on a gravel pad next to our house and is plugged into a 30 amp socket to allow the television to be powered on all winter and keep the converter charging the battery. I can see it from...
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I would get a really cheap volt meter- the kind with lights instead of numbers- unhook all but the over 13 volts light. If the light is on, it's charging, if it's off, it isn't, but the battery will still be OK.
