Hi. Need help For AC200P It doesn’t charge fully, charging at about 500 watts. I monitored this via a Wi-Fi outlet. Charging stops when the display shows 57.4 volts, even though the battery doesn’t have those volts. The approximate range between the display and the battery is 4 volts. This is why I get an overvoltage error. Because the voltage on the display is already at maximum, but in reality, the battery and cells don’t have that voltage. The maximum voltage on the cells after charging is 3.30 - 3.28 volts. I tried doing discharge and charge cycles, but that didn’t help. I tried charging from a different charger through the solar panel connector, and I tried charging from a gel battery with a slow 100 watt charger. I also get a jump, for example, from 30 percent to 100 percent, and then the charging stops. Question: Is it possible to flash the BMS via UART/USB? I understand the problem is there. Or perhaps the BMS divider resistors? How can I get the battery to fully charge without errors, etc.? Does anyone have a firmware dump via UART USB ?
Resistors R131 and R128. Are these resistors divider resistors? Can they be used to correct the voltage reading on the screen?