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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BFL, It has long been my plan to eventually move out west. I've been wanting to do some wwoof'ing on the Island for quite some time now. Green grass and daffodils would sure be a nice change at this point!
Re, stratification... yes, I've been wondering about that myself. In fact, I always do a few electrolyte re and re's, and give the batts a bit of a gentle knocking around/tilting to mix things up before taking readings. But I can certainly see there being some settling. Perhaps a longer dip tube would be helpful in determining the amount of stratification, and for mixing things up?
Landyacht asked an interesting question in his 'frigid weather charging' thread:
"So what is happening to the battery floating at 13.2v at say 10 degrees F. Is it still self discharging? Is it being discharged by the charger?"
If top-off and/or float charging at too low a voltage actually reduces the resulting resting ocv, then that may answer his question, and explain his buddy's battery's low readings. So I guess the real question is, should lower resting voltages be of any real concern, provided one is aware they are simply the result of lower voltage charging, and not necessarily an indication of lower soc? (once again indicating that SG readings are a more dependable method of determining soc)
Re, stratification... yes, I've been wondering about that myself. In fact, I always do a few electrolyte re and re's, and give the batts a bit of a gentle knocking around/tilting to mix things up before taking readings. But I can certainly see there being some settling. Perhaps a longer dip tube would be helpful in determining the amount of stratification, and for mixing things up?
Landyacht asked an interesting question in his 'frigid weather charging' thread:
"So what is happening to the battery floating at 13.2v at say 10 degrees F. Is it still self discharging? Is it being discharged by the charger?"
If top-off and/or float charging at too low a voltage actually reduces the resulting resting ocv, then that may answer his question, and explain his buddy's battery's low readings. So I guess the real question is, should lower resting voltages be of any real concern, provided one is aware they are simply the result of lower voltage charging, and not necessarily an indication of lower soc? (once again indicating that SG readings are a more dependable method of determining soc)
