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dvv711's avatar
dvv711
Explorer
Dec 21, 2016

Disconnect batteries?

We just got our new 42'6" long rv - our first. It is being stored in the park where we will live in it 6 mos of the year, beginning in May. Two questions: 1) When connected to shore power, should the batteries still be connected, getting charged the whole time - or will they overcharge? There is something called a 'smart battery combiner' installed & an inverter.
2) Secondly, when it's not connected to the shore line, and everything is shut down for months at a time, do we turn the 'disconnect batteries' lever to "off" ? Will the batteries freeze? Do we have to physically remove the batteries & store them somewhere warm?
I know nothing about electricity or batteries...need to know how to properly handle the batteries.
The rv is solar-prepped for a plug n play type solar panel that would sit on the ground. This could generate enough juice to keep the batteries charged...but not sure how to use this with/without shore power. Not sure if that's what we should do or not.
HELP.

35 Replies

  • In storage I prefer to leave the RV completely dead. Batterys disconnected at the terminals. No risk of anything electric failing that way.
  • Unless you have some way to charge the batteries, they will go flat in about 2-3 weeks, tops, if you don't use the on-board disconnect or otherwise physically disconnect them by pulling a cable. There are parasitic draws on the system, even if everything is turned off. Clocks on the microwave, TVs, DVD players, stereo, gas detectors and (if hardwired) smoke detectors all draw power all the time as long as there's power. I know on my Komfort, =everything= is killed with the house disconnect, except the slide and landing leg motors. FWIW, the disconnect on my FW also kills the battery charger, which I found out the hard way right before a boondocking trip.

    Fully charged, they shouldn't freeze and should last several months without a problem.

    Lyle
  • It's simple, if the batteries are charged, pull the negative cables and leave them alone. They won't freeze. My batteries survive winters a lot colder than yours will see.

    Bill