House battery draining
We have a 2016 Greyhawk 29mv purchased used in October. The previous owner had installed a new house battery and it worked OK on a shake down trip that fall. I'm storing the motorhome outside (Vermont) but have been starting the chassis, and the generator every few weeks with no obvious problems, but I noticed a few weeks ago that the battery indicator showed lower voltage in the house battery (down to 1/3, with measure voltage at the battery terminal around 11.5 v) after having run it two weeks previously. I initially assumed that it must be a bad battery or that I had somehow made it that way. I pulled it out and moved it inside, but at least over the past 24 hours or so it has not lost any voltage from what I measured on removal (12.45 v).
I'm slow charging the battery now and will follow the voltage and check sp. gr of the electrolyte, but I'm wondering if there is a short that might be causing loss of voltage, even though the battery shutoff switch has always been off after running the motors.
It's cheap lead acid battery and I'm inclined to replace it for an upcoming trip but wondered if there is an easy way to test the circuits connected to the positive terminal to try to isolate the problem. I notice the power to the steps remain on with the battery disconnect off. Are there other connections that do the same?
2016 Greyhawk 29 MV