Lakiakangas wind farm storage (Helen, jointly owned)
Operating, 5 MW · 10 MWh, owned by Helen (jointly owned; partner not named). 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 | 5 MW |
| Capacity | 10 MWh |
| Duration | 2.0 hours |
| Status | Operating, as of 2 December 2025 |
| Owner’s date | by 2024-02, actual |
| Placed on the map | not placed: no municipality in any source |
Who is behind it
| Owner | Helen (jointly owned; partner not named) |
| Business ID | 2630573-4 |
YTJ, by exact name: Helen Oy (the owner Helen names itself as; its partner is not named). https://avoindata.prh.fi/opendata-ytj-api/v3/companies?businessId=2630573-4
Not published anywhere we have found: ultimate owner, developer, built by, cells. The page says so rather than guessing.
What the sources say
No source read names the municipality.
Evidence and sources
- name: https://www.helen.fi/en/news/2024/Helen-to-improve-the-flexibility-of-the-electricity-syst…
- power: https://www.helen.fi/en/news/2024/Helen-to-improve-the-flexibility-of-the-electricity-syst…
- capacity: https://www.helen.fi/en/news/2025/one-of-finlands-largest-electricity-storage-systems-comm…
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-B003.