Motorthome was in storage for about a month in very cold winter temps, disconnect engaged on both banks of batteries. Checked battery status today.... house batteries still 98 percent charge, chassis batteries 30 percent . The only parasitic discharge would have to be through the small wires that are directly attached to the terminals. I believe one is for the engine computer not sure what the others are for. The batteries are new and I recharged them back to 100 percent today with an external charger... ( took approx 8 hours ). Any thoughts on what the parasitic discharge could be? or is it possible that these batteries simply cant handle cold weather?
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Not only your ECU, but radio memory, electric steps, clock, etc. can discharge the battery over time. If you disconnect the negative terminal, or use a switch like this:
You might have to let the ECU 'relearn' your driving habits when you hook it up again.
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
Having all those items directly hooked to the battery kind of defeats the purpose of the battery disconnect However one of those items must be drawing to much power. I think I will take your advice and disconnect the ground terminal. The computer can join me in re learning how to drive in the spring
. The only parasitic discharge would have to be through the small wires that are directly attached to the terminals. I believe one is for the engine computer not sure what the others are for. The batteries are new and I recharged them back to 100 percent today with an external charger... ( took approx 8 hours ). Any thoughts on what the parasitic discharge could be? or is it possible that these batteries simply cant handle cold weather?
However one of those items must be drawing to much power. I think I will take your advice and disconnect the ground terminal. The computer can join me in re learning how to drive in the spring 
Linear Mode
