Also note that at low temperatures, flooded batteries will freeze at low states of charge. On Mon, Oct 14, 2013 at 5:44 PM, veegee wrote: > Note that lead acid batteries will quickly degrade at low states of > charge, especially starter batteries (due to very high electrode surface > area). > > Personally, I would go for a 100Ah battery if I'm expecting to use 40Ah, > and charge it back up as soon as I can. At your low "C" current draw, lea= d > acids are expected to provide their rated capacity. > > I *think* they that the rating is designed for C/10 current draw, so you > should be good with a 50Ah if you have no choice. > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .