Ruien II
Being built, 100 MW · 250 MWh, in Kluisbergen, owned by Nippon Koei Energy Europe (51%), Aspiravi (24.5%), Ecopower (19.6%), Beauvent (4.9%). Every fact below is as a published source states it, with the address beside it; a field not shown is one no source gave, and nothing is guessed.
The battery
| Power | 100 MW |
| Capacity | 250 MWh |
| Duration | 2.5 hours |
| Status | Being built, as of 19 October 2026 |
| Owner’s date | 2027, expected in autumn 2027 |
| Municipality | Kluisbergen, Ruien, East Flanders |
| Grid connection | Elia, Ruien 150 kV |
| Placed on the map | at Ruien, the place its source names, in Kluisbergen (GeoNames) |
Who is behind it
| Owner | Nippon Koei Energy Europe (51%), Aspiravi (24.5%), Ecopower (19.6%), Beauvent (4.9%) |
Not published anywhere we have found: ultimate owner, developer, traded by, built by. The page says so rather than guessing.
Not in Elia’s list
Elia does not schedule this battery, because it is not yet running.
What the sources say
Two parts, 74.9 MW and 149.8 MWh, and 25.1 MW and 100.4 MWh. The second part’s 25.1 MW is the same as the first Ruien battery’s figure in Elia’s list, by coincidence. Construction began on 2 April 2026; the first spade was turned on 6 May 2026.
Evidence and sources
From the owners’, developers’ and builders’ own releases and the trade press, read by Vitreous, joined to Elia’s list by name. This page carries no money: no Belgian body publishes what a named battery earns. List id BE-B23.