Hello everyone, Nive here, I'm the sales manager at Lithium Batteries SA. I want to thank all the LBSA fans, I see you, for repsonding to @Krokkedil. The LBSA batteries use the advanced Seplos BMS- not the PACE BMS :) Unfortunately, the SOC on the old model is based purely on the voltage of the pack which is not as accurate compared to the Seplos BMS SOC. We do have the option to put the Seplos BMS in your older model LBSA in order for both to communicate with the inverter and the SOC's to match.