Deep Cycle Batteries

Question

Is there a trick to deep cycle batteries. I replaced the two 6 volt batteries in April. I've used the motorhome a few times since then. The last time being late May. Heading out for a trip in the near future decided to check the batteries and they are dead. I don't get it. I have the 12V switch turned off and the door as you enter. All of the other switches are off too. So I don't get why they are dead?

Any ideas?
thanks

mexicowanderer · Answer

A correct battery cutoff switch is about the diameter of a soup can, has a big metal handle and copper bolts on the other side that a 9/16" wrench fits. Such a switch will be located not more than a couple of feet away from the batteries.

What you believe is happening when you "switch everything off" isn't happening.

mena661 · Answer

Not all disconnect switches actually disconnect everything. The one in my MH disconnects all house loads from the battery BUT I can still charge/float my batts with the converter.

2oldman · Answer

And you're sure they were fully charged before disconnecting?

mrwizard · Answer

you didn't name the mfg and modelbut on many, the LP and CO detectors are independently hard wired and are NOT disconnected, unless you disconnect the battery ay the main cables

popsie · Answer

In our RV, even with the house battery disconnect switch set to off, the smoke alarm, propane alarm, etc. still draw on the battery.

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