Is there a correct battery voltage chart?
The battery voltage charts are all over the board..Is there a correct one out there for regular deep cycle/agm and lithium? I came across this one..How accurate is Nicks test?
Forum Discussion
Your batteries are too low when the inverter quits at its (say--they vary) 11v alarm/shut off voltage as seen by the inverter (wire gauge and length involved there too).
EG, with our set-up I get a 0.9v drop with the inverter pulling 125 amps. (This could be improved, but no need to.)
So if the bank is at 12.7 (no solar charging happening) the inverter sees 11.8 at first, then drops to whatever as the load keeps running. Might get to 11.6 before the MW is done.
So to stay above 11, I need to have at least 12.1 going in. I have no problem with going down to 40% SOC if need be, and the lights and furnace will still work ok, but the inverter will alarm off with the bank that low.
I accept the fewer lifetime deep cycles so the bank needs to be replaced every five years instead of eight years, so that I can run the inverter how I like.
EG, with our set-up I get a 0.9v drop with the inverter pulling 125 amps. (This could be improved, but no need to.)
So if the bank is at 12.7 (no solar charging happening) the inverter sees 11.8 at first, then drops to whatever as the load keeps running. Might get to 11.6 before the MW is done.
So to stay above 11, I need to have at least 12.1 going in. I have no problem with going down to 40% SOC if need be, and the lights and furnace will still work ok, but the inverter will alarm off with the bank that low.
I accept the fewer lifetime deep cycles so the bank needs to be replaced every five years instead of eight years, so that I can run the inverter how I like.
