Juankoski (Savon Voima)
Announced, 5 MW · 10 MWh, in Kuopio, owned by Savon Voima Oy. 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 | Announced, as of 24 March 2026 |
| Owner’s date | 2027 early, expected |
| Municipality | Kuopio (Juankoski) |
| Placed on the map | at Juankoski, the place its name carries (GeoNames) |
Who is behind it
| Owner | Savon Voima Oy |
| Built by | Merus Power |
Merus names "Savon Voima Oy". YTJ has Savon Voima Oyj (0171351-2) and Savon Voima Myynti Oy (1740586-4), which once carried the name Savon Voima Oy; not assigned.
Not published anywhere we have found: ultimate owner, developer, cells. The page says so rather than guessing.
What the sources say
Next to hydropower production (Merus H1 2026 report).
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-B061.