[SMM PV Flash] Netherlands’ 100 MW/200 MWh Antares BESS Enters Commercial Operation

Published: Oct 09, 2026 11:56 (GMT+8)

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Return has placed the 100 MW/200 MWh Antares battery project in Waddinxveen into commercial operation, making it the largest operating BESS in the Netherlands to date. The facility connects to TenneT’s 150 kV network, uses storage technology supplied by Alfen, has Vattenfall as its key long-term offtaker and received project financing from ING. With a two-hour duration, Antares can participate in energy trading, balancing services and other grid-flexibility markets. Its commissioning shows that the Dutch utility-scale storage market is moving from development and financing into large-scale operations, although revenues will remain sensitive to power spreads, ancillary-service prices and long-term offtake structures.

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