Belgium · the batteries
Gramme Storage 1
Being built, 50 MW · 100 MWh, in Huy, owned by Gramme Storage 1. 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 | 50 MW |
| Capacity | 100 MWh |
| Duration | 2.0 hours |
| Status | Being built, as of 19 October 2026 |
| Owner’s date | 2027, expected in mid 2027 |
| Municipality | Huy, Tihange, Liège |
| Grid connection | Elia |
| Placed on the map | at Tihange, the place its source names, in Huy (GeoNames) |
Who is behind it
| Owner | Gramme Storage 1 |
| Developer | Kallima Energies |
| Built by | Wärtsilä |
Not published anywhere we have found: ultimate owner, traded 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
Local press gives 31 units of 4 MWh, 124 MWh.
Evidence and sources
- owner: powermag.com/wartsila-building-energy-storage-in-support-of-…
- more: dhnet.be/regions/liege/2026/02/25/un-parc-de-batteries-d…
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-B27.