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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OP here. Checked the batteries after setting overnight without any drain. 6.42 & 6.43 (12.85) with Fluke meter. Checked SOC with refractometer and all cells were slightly over 1.3. Guess there is nothing to worry about.
1.3 seems high and this is the first time I used a new refractometer. I calibrated it with distilled water at the same temp as the battery.
Gonna throw them back in and see how it goes.
1.3 seems high and this is the first time I used a new refractometer. I calibrated it with distilled water at the same temp as the battery.
Gonna throw them back in and see how it goes.
