First 4-hour BESS goes online in the Netherlands

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Battery energy storage system (BESS) developer-operator S4 Energy has put a 4-hour duration project online in the Netherlands, the first in the country to become operational.

The firm has operationalised a 10MW/40MWh BESS in Rilland municipality, Zeeland province. S4 Energy said the project’s ability to store energy for longer periods, combined with its rapid-response capabilities, will enable it to provide essential services to the grid and, eventually, end-consumers.

Dominique Becker Hoff, CCO of S4 Energy, said: “It is no secret that the Dutch electricity grid is under strain. The demand for electricity is growing faster than infrastructure can be expanded. There is a mismatch between the timing of demand and the availability of sustainably generated energy. Both issues are expected to persist for the foreseeable future. We know that storage solutions are essential to keep the grid stable and energy affordable.”

The announcement did not specify the BESS supplier, but a photo provided along with the release (above) appears to show Tesla Megapacks.

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In October, S4 Energy acquired BESS development platform LC Energy and its 6GW project pipeline in the Netherlands, from UK developer Low Carbon, though it is unclear if this project is part of pipeline. Energy-Storage.news interviewed LC Energy executives about a 2GWh permitted project in September for a Premium article (subscription required).

Other large-scale projects expected to come online in the Netherlands this year include a 31.6MW/126.4MWh project from development vehicle FlevoBESS and a 45MW/90MWh project from developer Dispatch. Much larger projects, including those from S4 Energy/LC Energy, are coming down the line further ahead.

S4 Energy was one of the early movers in the Dutch BESS market with a 10MW project combining lithium-ion BESS and a flywheel coming online in 2020 but, until its acquisition of LC Energy, was notably absent among large-scale project announcements.

Companies developing projects in the GWh-scale in the Netherlands alongside it are Lion Storage, Giga Storage and Corre Energy, while SemperPower, PowerField and RWE have already deployed or are building sub-100MW grid-scale projects.

2 December 2026
Italy
Battery Asset Management Summit Europe is the annual meeting for owners, operators, investors, and optimisation specialists working with operational BESS assets across the continent. The Summit focuses on how to maximise performance and revenue, manage degradation, integrate advanced optimisation software, navigate evolving market and regulatory frameworks, and plan for repowering or end-of-life strategies. With insights from Europe’s most active storage markets, it equips attendees with practical guidance to run resilient, profitable battery portfolios as the sector scales.
22 February 2027
InterContinental London - The O2, London, UK
The Future of Energy Storage Starts Here Three days in London where developers, IPPs, investors, utilities and the manufacturers building the technology come to close deals, not swap business cards. If you need to be in the room with the people deploying capital into European storage, this is that room.

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