Two new "RV Deep Cycle" Interstate SRM-4Ds came with our h36 in Aug '15, and at that time I installed a ProNautic 1250P (before I realized the deal I could have gotten from MainSail). The ProNautic maintains the batteries year-round, but has loads 24/7 like the refer for about 6 mo of the year. I can't lift them out of the hold to take home for the winter.
Two weeks ago we lost power and the ProNautic lost it's mind and didn't return to charging mode when it powered up, just sat there showing 0.1 v output at 0 amps, with full fan on and cold. The panel meter showed the batteries ran down to about 11.8v. Upon cycling the AC power the ProNautic resumed normal operation and output 51 Amps over a period of at least 3 hours before getting the voltage up into the mid 13's. It eventually switched to Auto Maintain after about 5 hours only. I keep the charger in Flooded, Preset 2 (14.7 v conditioning and 12.8-13.4 v Auto Maintain). This happened once before last year when we forgot to turn the pedestal on after a day sail and the batteries discharged to 11.8 or 11.9 after several days.
Today with the charger in the Auto Maintain mode before shutting it off, one battery was hot and looked like it had been boiling while the other was cool. The hot battery measured 11.21v with loads/charger off for about 30 minutes (not 24 hours) and the cool battery was at 13.02 v.
Would equalization possibly bring the "dead" battery back - or is it a 120 lb zombie needing replacement by 2 GC2s?
TIA
Dan
Two weeks ago we lost power and the ProNautic lost it's mind and didn't return to charging mode when it powered up, just sat there showing 0.1 v output at 0 amps, with full fan on and cold. The panel meter showed the batteries ran down to about 11.8v. Upon cycling the AC power the ProNautic resumed normal operation and output 51 Amps over a period of at least 3 hours before getting the voltage up into the mid 13's. It eventually switched to Auto Maintain after about 5 hours only. I keep the charger in Flooded, Preset 2 (14.7 v conditioning and 12.8-13.4 v Auto Maintain). This happened once before last year when we forgot to turn the pedestal on after a day sail and the batteries discharged to 11.8 or 11.9 after several days.
Today with the charger in the Auto Maintain mode before shutting it off, one battery was hot and looked like it had been boiling while the other was cool. The hot battery measured 11.21v with loads/charger off for about 30 minutes (not 24 hours) and the cool battery was at 13.02 v.
Would equalization possibly bring the "dead" battery back - or is it a 120 lb zombie needing replacement by 2 GC2s?
TIA
Dan