jkwilson wrote:
Just SWAGing from the graph, it looks like that particular battery has a claimed cycle life of about 950 cycles at 70% average DOD, 1050 at 60%, 1200 at 50% and maybe 1600 at 40%.
Yep, and if you work the numbers, you actually get more use out of the battery when you drain it more: 950 x 70% = 665 "full cycle equivalents", 1600 * 40% = 640. So, it's cheaper to drain the batteries more and replace more often, than to pay for a larger bank so you don't break some manufactured "50% rule."
And, of course, 950 cycles is more than the vast majority of campers would experience in 20 years. The battery will die of old age before it dies from use.
