July 29, 2025 2 min. Member News

Eneco and EP NL invest in 200 MWh battery storage project at Enecogen in Port of Rotterdam

EP NL and Eneco are realizing a large-scale battery project on the site of Enecogen, the Europoort power plant of which both parties are half shareholders. The battery will have a connection capacity of 50 MW and an energy storage capacity of 200 MWh and can thus supply electricity for four hours. With this, the battery, which is to be put into operation in 2027, will provide more flexibility for the Dutch electricity system.

Battery storage allows electricity to be stored when there is more electricity available than there is demand, such as when there is a lot of solar and wind power being generated. That stored power can actually be delivered back when there is more demand than available green power. In this way, batteries ensure that the production of green power is less frequently restricted. In addition, price peaks are smoothed out this way and batteries can be used to reduce grid congestion.

Maintenance and operations are provided by Enecogen. Control of the battery is provided by the EP NL and Eneco trading departments.

Batteries essential, gear necessary

Batteries are indispensable for the energy transition. Yet the development of battery projects in the Netherlands lags behind that of other countries. This is because batteries in the Netherlands have to pay for taking power from the grid. The battery at the Enecogen power plant has the advantage of being able to use the existing connection to the grid, but often those grid costs are the bottleneck in making a battery project profitable. The possibility to enter into a time-dependent transportation contract and thus get a discount on the grid tariff is important, but not enough to make up for the Dutch lag in the battery field. The Netherlands should therefore apply an exemption from the net tariff for batteries as in Germany and Belgium.

"Fantastic that we can invest in this new battery, a breakthrough after years of development time. At the same time, it is a shame that this is only our first own battery in the Netherlands. We are still miles away from the battery capacity needed in the Netherlands to prevent power shortages and grid congestion and sufficiently reduce emissions from our energy system. Batteries in the Netherlands, like in Belgium and Germany, must be given an exemption from grid charges to enable that acceleration."

Karen de Lathouder, COO Assets Eneco

"This collaboration shows how market knowledge, technological innovation and partnership come together in a concrete project that directly contributes to a more stable and sustainable energy system. With this battery we invest not only in flexibility, but also in the future of the Dutch energy supply."

Martin Bartošovič, CEO EP EN

Batteries mainly provide short-term flexibility, but they are not the only link in a future-proof electricity system. Long-term flexibility is also needed. With the sharp increase in solar and wind power, controllable power plants run less and less frequently and investment in them is increasingly difficult. But they are still needed for times when there is little solar and wind available. Therefore, a capacity mechanism is needed to secure this long-term flexibility in our power supply. Both tracks reinforce each other and are necessary for a stable energy supply.

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