Reference project
Alsdorf Large-Scale Battery Storage Facility
Medium-Voltage Trading Storage
At the Regionetz substation in Alsdorf, Voltfang stabilizes the power grid and sells electricity on the short-term markets. The large-scale battery storage facility is operational and combines day-ahead and intraday trading with balancing power. Voltfang implemented the project as a full-EPC contractor and is responsible for its technical operation.
Capacity
20.34 MWh
Performance
9.5 MW
Storage duration
2 h
Grid connection
Medium voltage
Location
Alsdorf, North Rhine-Westphalia
Project Overview
- Location: Alsdorf, North Rhine-Westphalia
- Grid connection: Regionetz medium-voltage grid, directly at the substation
- Voltfang’s role: Full-EPC · Technical operator
- Market participation: Day-Ahead, Intraday, balancing power (FCR/aFRR)
- Status: In operation
One warehouse, three markets
The large-scale battery storage system is primarily used for grid services and electricity trading. Cross-market optimization generates arbitrage profits in the day-ahead and intraday markets. The storage system charges when prices are low and grid load is high, and discharges when prices are high and supply is tight. In addition, the 2-hour storage system provides primary and secondary control power (FCR/aFRR) and stabilizes the transmission system operator’s grid frequency.
Technology and Key Specifications
- 4× Voltfang 2 Plus GS Battery Storage Units
- 4× WS-Tech inverters
- 20.34 MWh capacity · 9.5 MW power
Voltfang's Scope of Services
1
Implementation (Full EPC)
One-stop planning and implementation of the project
2
Battery Systems
Delivery of Voltfang Battery Storage Systems
3
Technical Operations
Voltfang will serve as the technical operator of the BESS
“
Energy storage systems of this scale are crucial for the stability of our power grid and the security of supply for German industry.
Afshin Doostdar, CTO and co-founder of Voltfang
