Lead Acid Battery - 2 Cells No Float
So I picked up a new (to me) rig from family last weekend. It had been sitting at the BIL's place for several years. He started it occasionally, but never kept it plugged in. 2 of the 3 group 29,...
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Well, B... sure enough. In fact, you probably know this, but I discovered if you poke the Equalize button before selecting a charge mode, it will go into Equalize after completing any of the 4 current settings. Not just the 4A like I had ASSumed you telling me.
OK, I culled out the offending battery, disconnected the bank from the coach, equalized the other 2 at 15.7V via the 1093 and then reconnected and ran all the lights, 2 - Dometic Fan-tastic fans and 1 master bedroom ceiling fan for 2 hours. At the end I measured just over 12V running. I wish I'd a marked that one down
Then I shudder down and immediately got 12.25 resting from the 2 good 29s. Then ledder' sit for a couple hours and marked a resting voltage of 12.47.
I counted up all the lights and came up with about 32A. Plus 3A each for the Fan-tastics and guessing 5 for the ceiling fan in the bedroom?
So I come up with roughly 40A.
Given that, I took roughly 40A off of each ~ 100 Ah (20 hr rate) battery in 2 hours time. I'd say 12.47 resting is pretty darn good.
So yeah... 4+ hours of that kind of punishment can stretch a 315 Ah hybrid bank pretty far! Especially if one of those batteries is a drag on the ticket.
I reconnected the pair to the coach and lit up the Xantrex. It quickly got them up to 14.3 and went into acceptance.
I have the 1093 on the offender... set to go into Equalize once "full." But now that I have a semi-reliable load tester... I'm regretting even starting that. I'm going to run out and stop the 1093 and see how the offender does for 1 hour with all lights and fans running. Then I'll do the safe 1093 equalization. Then the hard equalization with The Beast and see if I get the SG in those 2 cells up.
OK, I culled out the offending battery, disconnected the bank from the coach, equalized the other 2 at 15.7V via the 1093 and then reconnected and ran all the lights, 2 - Dometic Fan-tastic fans and 1 master bedroom ceiling fan for 2 hours. At the end I measured just over 12V running. I wish I'd a marked that one down
Then I shudder down and immediately got 12.25 resting from the 2 good 29s. Then ledder' sit for a couple hours and marked a resting voltage of 12.47.
I counted up all the lights and came up with about 32A. Plus 3A each for the Fan-tastics and guessing 5 for the ceiling fan in the bedroom?
So I come up with roughly 40A.
Given that, I took roughly 40A off of each ~ 100 Ah (20 hr rate) battery in 2 hours time. I'd say 12.47 resting is pretty darn good.
So yeah... 4+ hours of that kind of punishment can stretch a 315 Ah hybrid bank pretty far! Especially if one of those batteries is a drag on the ticket.
I reconnected the pair to the coach and lit up the Xantrex. It quickly got them up to 14.3 and went into acceptance.
I have the 1093 on the offender... set to go into Equalize once "full." But now that I have a semi-reliable load tester... I'm regretting even starting that. I'm going to run out and stop the 1093 and see how the offender does for 1 hour with all lights and fans running. Then I'll do the safe 1093 equalization. Then the hard equalization with The Beast and see if I get the SG in those 2 cells up.
