Largest BESS in the Netherlands online

LinkedIn
Twitter
Reddit
Facebook
Email

Developer-operator SemperPower has brought online its second large-scale BESS in the Netherlands in the space of a month, a 68MWh system, the largest in the country.

The company has energised the 30MW/68MWh ‘Pollux’ battery energy storage system (BESS) project, it announced today (20 December).

Pollux is located on the same site as SemperPower’s Castor BESS, slightly smaller at 30MW/62MWh, which the company announced the start of operations on a month ago.

System integrator Alfen, which is based in the Netherlands, provided the BESS for the Pollux project through a turnkey solution including civil works, electrical integration and automation. Rolls-Royce meanwhile provided the BESS for Castor.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

Alfen also provided the BESS for SemperPower’s first project, a 9.3MW/9.9MWh system commissioned in Terneuzen in 2021.

The transmission system operator (TSO) in the Netherlands TenneT has said the country needs 9GW of new BESS by 2030 but it has lagged behind Belgium and Germany for deployments. A highly congested grid and ‘double-charging’ of BESS projects by treating them as both consumers and producers of electricity are among the main challenges.

Yves Vercammen, sales manager for Alfen, commented: “We’re especially proud that this project includes products from Alfen’s portfolio of integrated solutions, including our TheBattery Elements Energy Storage System, our Altro walk-in substation and even an Eve Double Pro-line EV charging station for site visitors to use.”

Energy-Storage.news’ publisher Solar Media will host the 9th annual Energy Storage Summit EU in London, 20-21 February 2024. This year it is moving to a larger venue, bringing together Europe’s leading investors, policymakers, developers, utilities, energy buyers and service providers all in one place. Visit the official site for more info.

3 November 2026
Málaga, Spain
Understanding technology and supplier selection for Europe’s utility-scale PV market in 2027. PV ModuleTech Europe 2026 is a two-day conference that tackles these challenges directly, with an agenda that addresses all aspects of PV module, inverter and battery supplier selection; product availability, technology offerings, supply chain traceability, quality assurance, factory auditing, system reliability, and supplier bankability.

Read Next

October 20, 2026
Oyster Renewable COO talks about India’s BESS growth, domestic manufacturing ambitions, supply chain resilience and challenges.
October 19, 2026
Energy storage is becoming an indispensable new-type power system infrastructure, CATL CEO and chairman Robin Zeng said in an industry speech last week.
October 15, 2026
Insufficient progress has been made towards the Energy Storage and Grids Pledge, endorsed by dozens of countries at COP29 two years ago.
October 14, 2026
DLA Piper finds merchant BESS appeal splits Japan, Singapore and Australia, with regulatory certainty, grid access and returns shaping investor views.
October 9, 2026
South Africa’s government has put battery storage and power-to-gas technologies at the heart of the national long-term electricity supply and demand strategy.