pianotuna wrote:
Hi,
There would be nothing to recover. Also recharging needs a higher voltage as temperature drops, so the converter won't do as good a job. I have camped at -37 c (-34 f).
Have a look at this chart:

At just over the freezing mark, batt capacity is 90%.
??? How would one use this info in real world application? For example, you have a 200Ah bank, so 100Ah usable. 90% is 90Ah usable; simple enough. But should you just think of this as 10% is gone, right off the top, so max 90% soc, no matter how much you charge, and then calculate Ah usage like usual, or should you (rather?/also?) allow for 90% efficiency of the (remaining) Ah's? (In other words, should one now consider a 10a load as an 11.1a load?) thanks!