A collection of pages and notes on claimed State of Charge (SOC) estimation accuracy for different chemistries and applications.
LFP BESS
Sungrow [1] state <3% SOC estimation error: Leveraging Sungrow’s AC-DC integration, PowerTitan 3.0 assigns one PCS per rack to eliminate the SOC unbalance between the racks. With an SOC estimation error of <3% and automated calibration, balancing extends across rack and block levels. This innovation enables up to 8% more discharged energy across the system’s lifecycle, maximizing operator returns.
Impact of SOC Estimation Error on the operation of the battery:
- incorrect remaining energy
- poorly balanced cells
- reduced charge and discharge power
- reduced lifetime
- operation outside of safe working limits