Akkula Big Battery
Being built, 62 MW · 231 MWh, in Rauma, owned by Neoen (100%). 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 | 62 MW |
| Capacity | 231 MWh |
| Duration | 3.7 hours |
| Status | Being built, as of 30 December 2025 |
| Owner’s date | 2027, expected |
| Municipality | Rauma |
| Grid connection | Fingrid 110 kV overhead line next to the site |
| Placed on the map | at the centre of Rauma, its municipality (GeoNames) |
Who is behind it
| Owner | Neoen (100%) |
| Developer | Neoen |
| Built by | Nidec (overall responsibility; containers, cells, inverters) |
Neoen SA, France. YTJ lists Neoen Storage Finland 1 Oy (3100878-5), 2 Oy (3364065-3), 3 Oy (3529064-2) and IV Oy (3553178-4), but no source read says which holds this battery.
Not published anywhere we have found: ultimate owner, cells. The page says so rather than guessing.
What the sources say
Next to the Hevossuo waste management site; four-hour battery.
Evidence and sources
From the owners’, developers’ and builders’ own releases, council decisions and permit bulletins, read by Vitreous and checked against the owners’ own words on 12 October 2026; a bracket such as “(Energy-Storage.news only)” in a field means the trade press is still the only source for it. Fingrid publishes no meter, no price and no instruction per battery, so this page carries no money: what one megawatt is paid in Fingrid’s markets is on the markets page, for the whole market and never for a named battery. List id FI-B028.