S4 Projects
Muntendam
200 MW / 800 MWh
S4 Muntendam is a large-scale HV battery energy storage system in development, designed to relieve grid congestion in the northeast of the Netherlands and support renewable integration, with planned commercial operation in Q1 2028.
Zeeland
10 MW / 47 MWh
S4 Zeeland marks a major milestone for the Dutch energy transition as the first 4-hour grid scale storage project in the country.
Heerhugowaard
10 MW / 47 MWh
From hybrid flywheel storage to a 4-hour BESS, S4 Heerhugowaard delivers next-generation grid flexibility.
Eemshaven
7.75 MW / 31 MWh
Strategically located in the heart of the northern energy hub, the S4 Groningen BESS delivers powerful, 4-hour flexibility.
Almelo
8 MW / 36 MWh
S4 Energy Almelo showcases the evolution from ultra-fast frequency response to long-duration, future-proof grid flexibility.
Barton
45 MW / 90 MWh
S4’s first UK high-voltage project, strategically located at 132 kV to deliver high-value grid support, reinforced by strong local O&M capability.
Barsinghausen
15 MW / 30 MWh
Burhafe
15 MW / 30 MWh
This 15 MW / 30 MWh battery energy storage system in Wittmund (Lower Saxony) is S4 Energy’s first German project to reach “Ready to Build” status after acquiring Terra One’s 310 MW portfolio — a major milestone in S4’s European expansion.
Musselkanaal
500 MW / 2,000 MWh
Wijdewormer
150 MW / 300 MWh
A stabilising battery project at a strategic location to address grid congestion in the province of North Holland.
