Originally Posted by trdutch
I learned that keeping the coach plugged in all summer just cooks the batteries
I keep them charged as necessary and topped with distilled water
Good quality Interstates that have not given me one ounce of trouble since I got rid of the stock OEM junk batteries that caused me over a years worth of problems with everything you are talking about
I guess I've been lucky. I checked the batteries on my Forester when I purchased it Jan. 2017 and all cells were good. It was built November 2016 so I figured it hadn't been plugged in much on the dealer lot.
According to the literature on my converter, a Progressive Dynamics I believe, it is a 4 stage converter/charger that maintains the batteries better than most. Supposedly, every 21 days, the charger turns up the amps to stir up the electrolyte which reduces sulfation.
We live in Georgia and our rig is always plugged into shore power when parked except when exercising the generator.
I started out checking the water level in the batteries monthly and it was 6 months before I needed to add any. I now check it quarterly and it appears it takes 6 months for my batteries to need topping off.
Not sure which brand converter you guys have but it doesn't seem right that your batteries are cooking.
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