I have a ac200p unit supplied by 600 watts of pv at off grid weekend cabin. When I leave for the week, I
turn the unit and the solar off, Usually the unit is fully charged when I leave. When I return and turn the unit on with the solar off the display will read a low charge around 15%. Then I will turn the solar panels on and the display will jump to 100% within minutes. Not sure sure which one is correct.
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Hello,
Could you please provide the SN code for your AC200L and the BMS version number? We will push the BMS firmware to see if it improves the situation.
Additionally, please perform a charge and discharge cycle by completely draining the battery and then charging it back to full without any load during the charging process.
@BLUETTI As I have an AC200P, but not with any current issues, how is a firmware push installed to a power station that has no external connectivity via Bluetooth or WiFi?
You note AC200L, the original poster has an AC200P. 
Hello,
Thank you for your understanding. The firmware upgrade indeed requires a Bluetooth connection. I apologize for the earlier mistake. He mentioned the AC200P, while I referred to the AC200L, and I have made the correction.
If you have any other questions or need further assistance, please feel free to let me know!