The temperature is very low for both batteries, are they stored in an unheated place?
Note that at these temperatures the chemical reactions of the cells slow down and provide less energy than nominal.
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What is the BMS version of the faulty B300?
If you connect via App to the AC300+2xB300 via Bluetooth, do you see any BMS updates available?
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Thanks again for answering.
So right now the batteries are in our van that sits outside in stead of in the warm garage cuz we were going to travel with it a few days ago. But then I saw that one of the batteries isn’t working, so it’s sitting there now until the issue is fixed.
The B300 has the latest update.
Hi @Anywherethevangoes, For this issue, we have already pushed the new firmware BMS v1021.14 to you. Please upgrade and test again.
Please update each battery one by one, connecting only one B300 battery at a time. After that, please try to do a complete cycle of discharge and charge to correct the SOC. The problem will be resolved.
Please follow the steps below to recalibrate it:
- Please discharge all the power (charge AC & DC appliances with the power station) until the SOC is 0%, turn off the machine, and leave it for 3 hours till it cools down.
- Please charge it again, please do not load any device when charging it, and do not interrupt it while in charge.
You can click this link for reference.
Since you mentioned an issue with the cable connection, could you try using another cable to see if the problem is with the cable?
Additionally, please test by disconnecting the B300 from the AC300 and charging/discharging the B300 independently. Does the B300 work on its own?
If the issue persists, please record a video, upload it to Google Drive or another cloud storage, and share the link with us. We will investigate further.
For promotional collaboration regarding the U.S. region on Instagram, please contact the relevant email for support. The email address is
helenchen@bluetti.com.
Thank you for @ndwr’s kind advice, it is very helpful!
YES THIS UPDATE WORKED! Thank you so much!