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Old 06-25-2013, 08:08 PM   #15
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The batteries will bulge from over charging. You stated that you store with shore power. The batteries are being charged on shore power thru the converter. If you do this again this winter coming up you again will be overcharging on shore power, to the point that they cases will separate and may cause an explosion.
Best advice I can give is to remove the house batteries and the coach battery and place on a home float charger in a warm garage. Be sure it is vented.

Hope this helps

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Old 06-25-2013, 08:25 PM   #16
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Originally Posted by Afc-Jr View Post
Lately I have run across advertisements for battery oil. It looks like a common sense approach to this issue. Has anyone tried this?
Here is the link: Battery Oil from Thermoil Battery De-Mister
Use plain old mineral oil from the drug store, lots cheaper and does the same thing. I did my Interstate U-2200's in 2004 and they lasted another eight years. I left our rig plugged in with the inverter on 24/7/365 for the whole time unless we were using it. The battery tray has one small spot of rust, the hold down straps are still the original too.
The correct amount is 2 oz per cell for 12 volt and 4 oz per cell for 6 volt batteries.
Here are the batteries after four years and they had not been cleaned even once in that time!
And for the worry warts out there: the gas can in the second photo has nothing but distilled water in it.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
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RV'ing since 1957, NRA Benefactor Life, towing '05 Odyssey
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Old 06-25-2013, 08:43 PM   #17
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Thanks Mr D, I will get some tomorrow and add it to each cell.
1994 40' Holiday Rambler Navigator (Jenny II)
Chevy Tahoe following very closely
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Old 06-25-2013, 09:27 PM   #18
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I just did my (4)four Interstate 6 volts. The mineral oil at our Walmart was "Heavy Oil" (not sure if there is any other choice). The 500ml bottles were $5.00/each.
Batteries were only two years old and good shape just eveidence of some gassing, etc.
We'll see what happens now after this.
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Old 06-25-2013, 11:22 PM   #19
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Battery bulge is not an issue unless it is...

It just is an indicator to look.

Small or large area, other variables to consider.

NEVER fill a dead battery, only enough to cover plates.

Expands as charged.

Check charging voltage, search for more info

Tony & Lori
1989 Country Coach Savannah SE
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