Temperature Compensation--Battery or Ambient?
OK I have had my fill of why you need a temp comp probe to the battery casing or battery post (whichever one this week it is supposed to go on, the neg or the pos :) ) I understand temp comp and ag...
Forum Discussion
pianotuna wrote:
Hi BFL,
I think it is a case of Good, Better, and Best.
Good--some form of temperature compensation
Better, a probe in the battery compartment
Best, a sensor on the Negative battery post.
Today it is only 7 C and the Magnum inverter/charger--which has a sensor on the was doing 14.9 volts in Absorb.
I'll try to check it later when we get down to 0 C (late tonight, or tomorrow morning).
Doesn't matter what the numbers are for that. The OP question is to quantify what the outcome would be with that and just simply having the voltages temp comp to ambient where the batteries are.
In "good, better, best" it is no use just saying that. It must be quantified. eg at -30C and +30C, how much difference in voltages would there be in the two cases each? THEN you have to quantify how much difference it makes to your battery management success between the two outcome voltages. ( My suspicion is that two voltage would not be different enough to even be able to measure any difference in battery management outcomes)
Lets see some actual numbers proving how much "best" is than "better"
Also since "better" is a probe in the battery compartment, is that "better" in any way from having the whole unit in the same ambient temp as the battery compartment, where the unit has an internal sensor? Any proof?
Links to studies people have done on all this are valid answers to the OP where they may have done lots of measurements and come up with some empirical evidence of whatever the answer is.
