Tuovila BESS
Being built, 125 MW, in Mustasaari, owned by Enlight Renewable Energy (51%, its results); Prime Capital agreed its continued development. 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 | 125 MW |
| Status | Being built, as of 4 August 2026 |
| Municipality | Mustasaari |
| Placed on the map | at the centre of Mustasaari, its municipality (GeoNames) |
Who is behind it
| Owner | Enlight Renewable Energy (51%, its results); Prime Capital agreed its continued development |
| Developer | Aurinkokarhu Oy |
Not published anywhere we have found: ultimate owner, built by, cells. The page says so rather than guessing.
What the sources say
Etha, adviser to the deal (17 Mar 2026): Aurinkokarhu and Prime Capital agreed at the end of 2025 on "the continued development" of Tuovila, near Vaasa, "Finland's first 125 MW, 4-hour" battery, reaching the start of construction that spring. Enlight (results for Q2 2026, 4 Aug 2026) says it acquired and began building Tuovila and Pyhäsalmi, 902 MWh together, owning 51%. Four hours would be 500 MWh; no source states it as a figure, so the capacity is blank. Not Teuva (Prime Capital, from Usva). From the Vitreous Nordic feed of 26 Oct 2026, checked 27 Oct 2026; Enlight's page was read by the checking agent, not reopened here.
Evidence and sources
- name: etha-consultancy.com/etha-advises-on-securing-financing-for-one-of-f…
- owner: globenewswire.com/news-release/2026/08/04/3338104/0/en/Enlight-Re…
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-B091.