Battery Storage Facility Faces 11% Capacity Loss Due to Imbalance Issues

A 350 MWh battery storage facility in Europe experienced revenue shortfalls due to battery imbalance, with up to 11% of capacity turning into stranded energy. Analysis revealed significant discrepancies in cell charge levels, leading to a daily energy gap of 15 to 40 MWh. Additionally, state-of-charge errors in lithium iron phosphate systems resulted in overestimated available energy, posing a financial risk of €25,000 to €110,000 weekly in the German market.

Published Mar 28, 2026

A 350 MWh battery storage facility in Europe faced revenue shortfalls attributed to battery imbalance, with up to 11% of its capacity stranded. The analysis indicated that the most charged cell reached 100%, while the least charged only reached 75%.

AI-curated by Theia

In series configurations, this imbalance restricts charging and discharging processes. The case study identified a daily energy gap ranging from 15 to 40 MWh. Furthermore, errors in state-of-charge estimates for lithium iron phosphate systems resulted in overreported energy availability, leading to potential balancing costs. The financial impact was estimated at €25,000 to €110,000 weekly in the German energy market.