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Old 05-19-2017, 07:24 PM   #1
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Brand: Thor Motor Coach
State: Colorado
Posts: 22
GC2 series pairs capacity

I've read a lot here about not mixing batteries, new with old, different brands, etc. Folks state that a bad battery will destroy the good one(s) paired with it? Can some of you tell me why this is so? I have 3 series pairs of GC2's for a total of 680 amp hours and don't seem to be getting anything near that amp hours capacity? My Magnum 100 amp charger will put 105 amps out and I have measured almost equal charge/discharge current in each of the 3 series pairs. Seem OK to me but don't like the results?
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Old 05-20-2017, 05:05 AM   #2
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Brand: Thor Motor Coach
Model: Axis 24.2
State: Idaho
Posts: 399
You'll get the total capacity of about 3x the weakest parallel pair. If all 6 batteries are 100% then you'll get closer to the assumed or rated capacity. It only takes one to slowly destroy the rest and speed up the death of the weakest.
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