55 Amp Converter Charge Times
It it possible for a 55 amp converter (with a 14.4 volt quick-charge mode) to take a new Interstate SRM-24 series Marine/RV battery that's discharged to 11.90 volts and charge it to 90% (12.58 volts) ...
Forum Discussion
RoyB wrote:
OTRFUN - The idea is to "never never never" let your battery get below 12.0VDC... This is around the 50% charge state. If it gets to 10.5VDC it is 0% charge state.
10.5v is 0% under a modest load (5 to 25 amps?). Comes from the BCI testing standard for amp hours and reserve minutes testing. 11.89 is 0% when resting such as in storage. The RV true 0% might be somewhere in the middle due to smaller load.
No more than 50% is a full timers rule. 70% to 80% discharged is closer to the max for part timers IMO. Still get plenty of cycles to last 8+ years. Trouble is knowing how low is low so it is OK to be conservative at 50% when possible.
Just as important to get recharged asap. And 13.6v is a slow slow charge.
