Quote:
Originally Posted by ctb
Would a bad/old chassis battery drain the house batteries when not on shore power?
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Overall I'd think not, being you have a gas SMB (one starting battery). I'd be more incline to wonder if one of your two house batteries has a problem. I'd look over all your battery connections.
How long does it take for your separator to open up after you kill the engine at dark (no solar) with no shore power?
If you have a bad starting or house battery (or a substantial hidden load), it will open very quickly without any charge current (including solar) being applied. My separator stays closed after I shut down the engine at night (when there is no solar charge) and the batteries will stay at just below a float level for several minutes (even an hour or so) before the voltage drops enough to open the separator. If it open quickly it points to a load/drain which could be a bad battery or hidden draw.