Grid Operator Dispute Limits BESS Operations in Brandenburg

A newly operational 69 MW solar and 76.5 MWh battery hybrid plant in Brandenburg, Germany, has become the center of a significant regulatory dispute. The local distribution network operator, Eon Edis, withdrew an agreed 6.8 MW grid import capacity for the new BESS. This restriction forces the battery to store only co-located solar electricity, severely limiting its ability to operate as a grid-charged storage system and restricting potential revenue streams from energy arbitrage.

The project operator has initiated legal action to restore the import capacity. The dispute underscores the growing friction between rapidly expanding battery storage assets and local grid infrastructure constraints. Meanwhile, 33.6 MW of the solar plant was sold under Germany’s investment asset business (IAB) model, while Suena Energy is responsible for optimizing and marketing the BESS, though no PPA or flexibility purchase agreement is currently in place.

Grid Fees and Capacity Market Exclusions

Beyond local disputes, Germany's grid-scale storage market faces broader policy uncertainties. The Federal Network Agency (BNetzA) has clarified that large-scale storage projects commissioned after August 4, 2029, will be subject to annual grid fees of €4 to €7 per kW, without volume-based charges. Dynamic grid fee components are not expected before 2032.

Despite strong market growth, German BESS developers face significant hurdles regarding grid access, fluctuating fee structures, and exclusion from initial capacity market auctions.

Furthermore, the BNetzA finalized the first 9 GW capacity market auction for September 2026, but it is largely restricted to gas plants capable of 10-hour continuous discharge, effectively excluding battery storage. BESS operators are expected to participate in a separate 2 GW tender in 2027. Until then, most battery projects must rely primarily on day-ahead market price spreads to generate revenue.

Source: PV Magazine / Sina Finance

This article was assisted by AI analysis. Please refer to the original source for official information.