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Each BMS handles 2P x 4S = 8 cells. The cell is 280AH, 3V nominal. So each BMS is managing 560 AH x 12V. It is equivalent of managing 4 x (560AH, 3V ) cells connected in series.

Why? You mean Bluetooth version has some known issues? The other two units seem to be working fine, though.

Brewmatic, You were right! It was a software issue. I deleted the software from my iPhone and reinstalled. Now, the error is gone:-) Thank you very much!! Ethan

I have a MAC, not Windows PC. If they have MAC version, I can try using it on it to see if any differences. Thanks for the suggestion.

Hi, I have constructed LFP battery pack that uses four(4) Overkill BMS each managing eight(8) 280AH cells in 4s2p configuration. Now when I try to write/download a config to the BMS using iOS app, two(2) out of the four (4) refuse to accept the config with an error saying something like “Cycle...

Hi, Thank you for your response. The “Battery Cycles” under “BMS infor” is Read-only infor which I don’t seem to be able to modify. The exact error message was shown in the attached. It almost sounds saying that the value must be more than “0” but the ones with error has “Battery Cycles” = 6 vs...

I have tried to read/write cycles a few times with the same result. Since I cannot modify the config which is default to 100 AH, I turned off the pack. Another thing I noticed is that, once I create a config file with a certain parameter set, I don’t seems to be able to edit it even though the...