Hi All!
I finally got my system installed and its been running for a few days, but I have been noticing an issue. Specs are : 24V Off Grid. Multiplus 24/3000/50, Victron Smart Solar 150/70 CC, (2) 272AH 24 V battery packs each with Overkill BMS.
I am noticing that my battery packs are not working equally. When I have a large load, pack #1 is supplying around 70% of needed watts. When I am charging, pack #1 takes around 70% of the amps and charges up quicker. This seems like a problem. All my BMS settings are the same and wire length, etc is the same for each.
Some background - I built these packs in spring and did capacity test on them both (they were fine) - then I charged each of them up to about 30-40% SOC because I knew it would be a bit till I installed them. I was not exact at all to what SOC I brought them up to before letting them sit. Then I installed these packs in my system last week without any further charging/balancing/etc. I thought they would equalize within a few days, but that doesn't seem to be happening. Right now I have my Charge controller set to 27.1 for absorb and float - I had them both set to 27.4V, but then I noticed pack #1 had a few cells taking off and starting to diverge as they got above 3.4V and pack #2 was behind and I wanted to play it safe and not send any cells running high...
Any ideas what is happening and ways to figure out the issue? I know (think) its not a big issue for the time being as I am not running huge loads, but it just doesn't seem right and I am not smart enough to figure out what the issue could be....
Thanks for any ideas and feedback!
I finally got my system installed and its been running for a few days, but I have been noticing an issue. Specs are : 24V Off Grid. Multiplus 24/3000/50, Victron Smart Solar 150/70 CC, (2) 272AH 24 V battery packs each with Overkill BMS.
I am noticing that my battery packs are not working equally. When I have a large load, pack #1 is supplying around 70% of needed watts. When I am charging, pack #1 takes around 70% of the amps and charges up quicker. This seems like a problem. All my BMS settings are the same and wire length, etc is the same for each.
Some background - I built these packs in spring and did capacity test on them both (they were fine) - then I charged each of them up to about 30-40% SOC because I knew it would be a bit till I installed them. I was not exact at all to what SOC I brought them up to before letting them sit. Then I installed these packs in my system last week without any further charging/balancing/etc. I thought they would equalize within a few days, but that doesn't seem to be happening. Right now I have my Charge controller set to 27.1 for absorb and float - I had them both set to 27.4V, but then I noticed pack #1 had a few cells taking off and starting to diverge as they got above 3.4V and pack #2 was behind and I wanted to play it safe and not send any cells running high...
Any ideas what is happening and ways to figure out the issue? I know (think) its not a big issue for the time being as I am not running huge loads, but it just doesn't seem right and I am not smart enough to figure out what the issue could be....
Thanks for any ideas and feedback!