The Netherlands publishes no list of its large batteries. Their owners name 31 running, 569 MW, and 892 MW being built.

Owners name 40% of the megawatts Statistics Netherlands counted at the end of 2025, and 10 of its 256 small batteries

Statistics Netherlands counts every battery of 1 MWh and more each year, from Energy Storage NL, TenneT and other sources, and publishes the totals by size without a single name. Of the 30 batteries it counts above 10 MWh, owners have named 14 as running by then; of the 256 between 1 and 10 MWh, 10. The small ones are the gap: they sit at farms, glasshouses, depots and factories, and their owners rarely announce them.

Statistics Netherlands, table 85929NED, “Grote batterijen voor opslag van elektriciteit”, end of 2025, provisional, as reported on 10 October 2026; batteries of 1 MWh and more, counted as systems at a separate site. The named batteries are those an owner, builder or the trade press dates as running before 2026, sized by the owner’s figure and classed by the capacity the source gives. A battery whose capacity no source gives is classed as small.

892 MW is being built, and most of it is due in 2027

The named batteries by the year their owners give for the start. The running ones are dated by when they started; the ones being built by when their owners expect them. Return’s Mufasa at Vlissingen and GIGA Storage’s Leopard at Delfzijl, 650 MW between them, are both due in 2027. An owner’s expected year is the owner’s word and has slipped before: Mufasa was first due in 2026.

The named batteries running or being built, by the year their owner or builder gives, in MW as the owner states it. Batteries with an investment decision, a permit or an announcement only, 2,644 MW, are left out.

Where the named batteries are

One circle per named battery, sized by power. Yellow runs; blue is being built; pale blue is decided, permitted or announced; grey is built or due with no source saying it runs.

58 of 64 batteries placed: 24 at the site itself, the rest at the place their source names or the centre of their municipality, from GeoNames.

Every battery named as running

As the owner, developer or builder states it, or the trade press where they have not; the date is the stated start. Each battery’s page says how sure the source is and why.

Being built

Built or due, with no source saying they run

Batteries placed, moved or due to start whose running no source confirms. They are counted with neither the running nor the being built.

Decided, permitted or announced

The owners with the most running

Who builds them

Alfen is named on 12 of the 64 batteries. A battery with two firms named counts for each.

What is not here, and why

The batteries no owner has announced, which by Statistics Netherlands’ count is most of the small ones. A meter on any battery, because no Dutch battery reports its output to ENTSO-E and TenneT publishes none per unit. What TenneT pays for balancing and the bids it receives, which its data service publishes, because its terms forbid passing that data on without its permission, which we asked for on 19 October 2026. The connection queue, because TenneT gives it only as totals. The day-ahead price is on the European prices page. Nothing on this page is modelled, and a connection figure is never passed off as a battery’s size.

Sources: nl/hand/batteries.csv, kept by hand from owners’, developers’ and builders’ own releases, grid operators’, provincial and municipal notices and the trade press, every fact with its web address. Statistics Netherlands, table 85929NED. Places from GeoNames (CC BY 4.0) and OpenStreetMap (ODbL).