Very Low OCV on Full Batts???
I've been seeing lower than usual resting ocv this winter, compared to last. Figured it was either wear and tear, too high a charging voltage, or a parasitic draw. So I tried throwing a lower vol...
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SMK,
The ambient temps have been consistently below freezing, but we've had even colder days earlier this winter (like -22*C) with no such drop in ocv. I was top charging in the 15.4-15.6v range so I dropped it down to see if that would bring the resting ocv back up. Never got to see if that was the deal. This sudden drop in ocv is completely new. As stated, last winter the bank would hold strong at 12.78v for 3 or 4 weeks. Once, after 5 weeks, they were down to about 12.7, IIRC.
Roy,
12.6v is what I usually see after two days of light (summertime) use. I was hard pressed to find a chart that reflected my batts, but I did find one that goes to 12.8v. I've confirmed it with the Trimetric's Ah count, as well. My batts have always had higher than average ocv and sg readings (1.275-1.290 range).
The ambient temps have been consistently below freezing, but we've had even colder days earlier this winter (like -22*C) with no such drop in ocv. I was top charging in the 15.4-15.6v range so I dropped it down to see if that would bring the resting ocv back up. Never got to see if that was the deal. This sudden drop in ocv is completely new. As stated, last winter the bank would hold strong at 12.78v for 3 or 4 weeks. Once, after 5 weeks, they were down to about 12.7, IIRC.
Roy,
12.6v is what I usually see after two days of light (summertime) use. I was hard pressed to find a chart that reflected my batts, but I did find one that goes to 12.8v. I've confirmed it with the Trimetric's Ah count, as well. My batts have always had higher than average ocv and sg readings (1.275-1.290 range).
