Bayernwerk Netz is seeking a battery storage system with 20 MW of power capacity and at least 80 MWh of storage capacity
It is intended to replace a planned conventional grid upgrade at the Speichersdorf substation
The project is expected to become operational by the end of 2027
Bayernwerk Netz GmbH, the German regional distribution system operator, has invited expressions of interest (EOI) for a 20 MW/80 MWh battery energy storage system (BESS). It will be located in Bavaria.
It says the project is designed to relieve grid congestion at the Speichersdorf substation and improve the integration of renewable energy into the regional electricity network. The operator had previously awarded a grid-supporting storage system with 5 MW capacity to MaxSolar GmbH for the Wutzldorf location.
The company aims to use the battery system as an alternative to conventional grid expansion, potentially reducing the time needed to address network constraints. It will be connected directly to the Speichersdorf substation. Commissioning is targeted for the end of 2027.
It says the battery will operate according to the requirements of the electricity grid rather than solely responding to market prices.
Bayernwerk Netz added that the project is designed under Section 11a of Germany’s Energiewirtschaftsgesetz or Energy Industry Act (EnWG), which will allow grid operators to use storage systems as grid-serving equipment. Under this, the storage system will relieve network bottlenecks, avoiding network expansion measures.
The EOI with Storage Identification number BAGE_S0007 is open to registered service providers. Bayernwerk Netz will accept registrations to the tender between November 9, 2026, and November 23, 2026.
A Fraunhofer IEE study identifies potential for Germany to accommodate 150 GW of additional solar PV capacity through the use of smart battery storage at existing substations. It will require around 60 GW/240 GWh of battery storage capacity (see Germany: Battery Storage Can Unlock Additional 150 GW Solar PV).