Checked SG on these same batteries today after solar had them in absorption for an hour. They were taking 3.8 amps at 14.5.
Of 12 cells, most cells were 1.280 or 1.285 one was 1.275, one was 1.300.
They took about 1/3 a gallon of distilled h20 afterward.
I raised the acceptance to 15.5 for the rest of today. They are taking 10.1 solar amps at 15 volts at 2:30 pm at 75f has not risen above 15 after an hour at 10+ amps
I have not been plugging into the grid much at all. Perhaps 2 times in the last 3 months. The solar with occasional alternator contribution has been more than sufficient to return the 25 to 65 amp hours I use each night.
At 60 amp hours from full, while still supplying 4 amps, they will read 11.9 volts. I don't know what they rebound to once I stop streaming movies.
Regarding my nearly 6 year old engine battery, I cycled that once or twice too mistakenly, but not very deep. Once, my Fuel pump relay's contacts crusted over, and after 7 seconds of cranking it slowed down significantly revealing its reduced capacity. Normally the engine cranks for no more than a second before catching. I usually feed it some solar amps in the afternoon when extra are available.
I have not put water in the engine battery in years. Have not had to and I check every month.
