I think I'm looking at new batteries.
I have a pair of interstate Costco 6v that are about 3 years old. We don't boondocks anymore and the trailer is at the ranch and hooked up constantly. PD9855 (?) does the charging. I did a SOC ...
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I always had different voltages with 6s in series. If the total was 12.6v, that might be 6.2 plus 6.4.
You get more like 6.0 plus 6.6?
I would give the pair a deep cycle to say 50% SOC and then a recharge and see what the SGs are after that. Maybe now a difference will appear, or maybe the voltages will even up some. Hard to tell now with all the SGs looking good if anything is wrong.
They might just need a bit of exercise. Battery specs recommend doing that every so often if they are on a float for a long time.
You get more like 6.0 plus 6.6?
I would give the pair a deep cycle to say 50% SOC and then a recharge and see what the SGs are after that. Maybe now a difference will appear, or maybe the voltages will even up some. Hard to tell now with all the SGs looking good if anything is wrong.
They might just need a bit of exercise. Battery specs recommend doing that every so often if they are on a float for a long time.
