Hi y'all.
Have a bit of an issue that hopefully someone can help me with. Some info on my system:
I have a DIY whole home system with 2 parallel 48v 308Ah LiFePO4 battery banks I built myself, 16 cells each (new ones from EEL Battery, so they should theoretically be decent quality). I'm using the Overkill solar BMS to manage each one. Hooked up to a Sol-Ark 15k.
Tonight I had an outage. Looks like the grid went down for a few minutes. However, I lost power when our batteries should have kept us up for those few minutes. Upon digging through the data in PV Pro I saw that the battery kicked on as expected, but then shut off just a few minutes later. I also noticed that recently, the SOC shown on the inverter has been dropping from 50% to 0% instantly sometimes.
So I went out to read the data directly from the BMSs and low and behold...battery bank 2 shows 0% SOC. Battery bank 1 was at 39%, which seemed expected given we just had an outage. However I also looked at some of the data on bank 2 and saw that it's registered 10s of thousands of cell under/overvoltage events, whereas bank 1 has 0.
Anyone have any ideas what could be going on here, or any recommendations on troubleshooting steps? It would be a pain to have to tear the entire bank apart and test everything one by one - I'll do it if I have to but trying to avoid that.
BMS screenshots attached if that helps.
Have a bit of an issue that hopefully someone can help me with. Some info on my system:
I have a DIY whole home system with 2 parallel 48v 308Ah LiFePO4 battery banks I built myself, 16 cells each (new ones from EEL Battery, so they should theoretically be decent quality). I'm using the Overkill solar BMS to manage each one. Hooked up to a Sol-Ark 15k.
Tonight I had an outage. Looks like the grid went down for a few minutes. However, I lost power when our batteries should have kept us up for those few minutes. Upon digging through the data in PV Pro I saw that the battery kicked on as expected, but then shut off just a few minutes later. I also noticed that recently, the SOC shown on the inverter has been dropping from 50% to 0% instantly sometimes.
So I went out to read the data directly from the BMSs and low and behold...battery bank 2 shows 0% SOC. Battery bank 1 was at 39%, which seemed expected given we just had an outage. However I also looked at some of the data on bank 2 and saw that it's registered 10s of thousands of cell under/overvoltage events, whereas bank 1 has 0.
Anyone have any ideas what could be going on here, or any recommendations on troubleshooting steps? It would be a pain to have to tear the entire bank apart and test everything one by one - I'll do it if I have to but trying to avoid that.
BMS screenshots attached if that helps.