Olkiluoto backup battery (TVO)
Announced, 90 MW, in Eurajoki, owned by Teollisuuden Voima Oyj (TVO). 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 | 90 MW |
| Status | Announced, as of 16 June 2021 |
| Owner’s date | 2022, expected |
| Municipality | Eurajoki (Olkiluoto) |
| Placed on the map | at the centre of Eurajoki, its municipality (GeoNames) |
Who is behind it
| Owner | Teollisuuden Voima Oyj (TVO) |
| Built by | Hitachi ABB Power Grids (e-mesh PowerStore, SCADA, substation expansion) |
| Business ID | 0196656-0 |
YTJ, by exact name: Teollisuuden Voima Oyj. https://avoindata.prh.fi/opendata-ytj-api/v3/companies?businessId=0196656-0
Not published anywhere we have found: ultimate owner, developer, cells. The page says so rather than guessing.
What the sources say
Hitachi ABB Power Grids (June 2021): 90 MW on the island of Olkiluoto, fast-start backup power for a disturbance at Olkiluoto 3, to be commissioned in 2022. TVO's news page (read 12 Oct 2026) has no battery item. No source read confirms it exists; whether Fingrid counts it in dataset 424 is unknown. Earlier source World Nuclear News replaced by the supplier's own release.
Evidence and sources
- name: https://www.hitachienergy.com/news-and-events/press-releases/2021/06/hitachi-abb-power-gri…
- municipality: https://www.hitachienergy.com/news-and-events/press-releases/2021/06/hitachi-abb-power-gri…
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-B046.