The battery does not have a power in for the heater. The model of the battery is: Sodium Nickel Chloride Stationary Application Battery MH49779 48Vdc, 276Ah
I got my Durathon Battery (Sodium Nickel Chloride) 276Ah battery cells to 40°C and the battery is no longer warm. There is no output through the BMS. If l remove the BMS and measure the voltage using the terminals straight from the main battery l get 54.5V. Any one who knows how l can heat my cells again to get the BMS working.