B230 shows incorrect SOC after a period of inactivity

Product Discussion BLUETTI Apex & AC Series
1

I have an AC200MAX with one B230 battery module. The issue arose when attempting to update the DSP firmware. Previously, both modules displayed slightly inaccurate charge levels, but this wasn’t critical. Apparently, the issue arose because both modules were turned on during the firmware update, causing the B230 to display incorrect charge levels.

The main issue is that after being powered off for a while, the B230 (at 100%) displays 67% charge when powered on, regardless of the actual charge level before powering it off. Essentially, this module now thinks 67% is the maximum charge level. If I connect it to the charger for 10-20 seconds, the system corrects the display to 100%. However, if one module displays 100% and the other (B230) is stuck at the incorrect 67%, the B230 discharges, but the AC200MAX does not. If both modules display correct values, they are discharging correctly.

I currently have the following firmware versions installed:

ARP: v4008.05

DSP: v4005.08

BMS: v1017.03

I would like to request a firmware update for SN: 2309001288866 to resolve this issue.

2

I wonder if this pertains:

AC200Max and B230 SOC for each depends
AC200Max and B230 SOC for each depends519×595 56 KB

3

I only know what started it. And that it was clearly a software error.Please help me solve the problem @BLUETTI

4

I think you should try charging the B230 alone until it reaches or exceeds the SOC on the AC200Max. I have both (actually I have four B230s). And when you do an update on the app, the B230(s) should be connected to the AC200Max.

I would try that while you are waiting to hear from Bluetti. Did you email them?

Email : service@bluettipower.com
Customer Support: +1 909-570-0909
Monday to Saturday: 6am - 5pm (PDT)

5

Yes, thanks for the advice. But I’ve been suffering from this for 2-3 months now and have tried almost everything. I wanted to calibrate it, but I read that a regular calibration might not be enough and that it’s best to do it after a firmware update. I’ll email them, thanks.

6

Maybe this video will help! https://youtu.be/XMHLtqlDnus?si=XgjiU-YCSU3LfbnA

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