Kärppiö / Karppio (Delta Capacity)
Being built, 125 MW · 300 MWh, in Teuva, owned by Delta Capacity and Strioga Family Foundation. 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 |
| Capacity | 300 MWh |
| Duration | 2.4 hours |
| Status | Being built, as of 24 September 2026 |
| Owner’s date | 2027 Q4, expected |
| Municipality | Teuva |
| Placed on the map | at the centre of Teuva, its municipality (GeoNames) |
Who is behind it
| Owner | Delta Capacity and Strioga Family Foundation |
| Developer | Helios Nordic Energy |
| Built by | Sungrow (BESS technology); NEPower (balance of plant, electrification, substation); Despro (owner's engineering) |
Delta Capacity (Swiss) and Strioga Family Foundation. YTJ lists Kärppiön Sähkövarasto Oy (3520843-4) and Teuvan Sähkövarasto Oy (3537892-7); there are two Kärppiö projects in Teuva, so neither can be assigned.
Not published anywhere we have found: ultimate owner, cells. The page says so rather than guessing.
What the sources say
Delta Capacity (24 Sep 2026): under construction in Teuva, commissioning Q4 2027; developed with Strioga Family Foundation, bought ready to build from Helios Nordic Energy (14 Jul 2026). Not the same as Nala's 100 MW Kärppiö in Teuva (separate row). Partial toll with Centrica Energy.
Evidence and sources
- name: https://www.deltacapacity.com/post/delta-capacity-partners-with-sungrow-nepower-and-despro…
- owner: https://www.deltacapacity.com/post/delta-capacity-and-strioga-family-foundation-partner-on…
- developer: https://www.deltacapacity.com/post/delta-capacity-and-strioga-family-foundation-partner-on…
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-B024.