Circle area is the megawatts

Battery, operatingBattery, being builtBattery, announcedBattery, status not stated

83 of 89 batteries drawn: at the place their name carries where GeoNames has one near their municipality, otherwise at the centre of their municipality; 6 could not be placed because no source names a municipality. Yellow operates; blue is being built; pale blue is announced.

Application from 1 MW for storage (Fingrid, from 1 June 2026)Application from 1 MW for storage and generation

The shaded areas are Fingrid’s connection-application zones, valid from 1 June 2026: an application is needed from 1 MW for a battery in the solid-edged areas, and from 1 MW for a battery or a generator in the dashed one; everywhere else from 2 MW. They are thresholds for applying, not grid capacity, and the edges are as rough as Fingrid draws them. Fingrid’s map, read 17 October 2026. The dashed dark line runs through Tampere, Lahti and Lappeenranta: Fingrid closed the grid south of it to new storage until 2029 (26 September 2025), and says about half the storage it counts sits south of it.

Mapped on OpenStreetMap, named by no owner

Hollow rings are battery sites volunteers have mapped on OpenStreetMap that no owner, builder or permit has named: 5 of them, read 18 October 2026. They carry whatever the mapper wrote and no megawatts of their own; click one for its tags and its page on OpenStreetMap. Where a mapped site matches a listed battery, the battery’s circle sits at the mapped point instead (2 so far).

Transmission network400–500 kV220 kV110 kV

Every line of 110 kV and up as OpenStreetMap maps it (2,749 lines, 894 substations, 1,239 more with no voltage mapped left out), read 2026-10-17; the highest voltages at every zoom, the 110 kV web and the substations when zoomed in. Mapped by volunteers from imagery and operators’ maps, so a line can be missing. OpenStreetMap contributors, ODbL.

Finland · the batteries their owners name · Fingrid’s count of 18 October 2026

2,057 MW of batteries are connected in Finland by Fingrid’s own count. Their owners name 24 of them, 457 MW, and 1,600 MW more being built.

No Finnish body publishes a list of the batteries on the grid. Fingrid, the system operator, counts them and publishes the total, hourly; the Energy Authority’s register of power plants holds no battery. So this map is the batteries their owners and builders have named in their own releases and in council and permit papers: 89 of them, every fact with its source beside it. 24 are operating (one of them energised and commissioning), 31 are being built and 34 are announced. The 24 operating hold 457 MW, about 22% of Fingrid’s count; the rest of the count has no name in any owner’s release. There is no queue to draw: Fingrid says more than 30 GW of storage has asked to connect and about 1.8 GW holds a contract (26 September 2025), and names none of it. The Finland page reads Fingrid’s count and the reserve markets; every named battery has a page.

Fingrid’s count2,057MW connected · 18 October 2026

Operating, named457MW · 24 batteries

Being built, named1,600MW · 31 batteries

Announced, named1,591MW · 34 batteries

Showing every battery the list names. Filter by status or owner, or search a battery, an owner, a builder or a place.

Every battery named, a megawatt and up

Largest first. Click a row to centre the map on the battery, or open its page for every fact and its source. Power and capacity are as the owner or builder stated them; the date is the owner’s stated start, actual for an operating battery and expected for the rest. A blank means no source gave it; a battery whose owner has given no size is listed at nought and says so.

Battery	Owner	Municipality	Status	MW	MWh	Date

Source: fi/hand/batteries.csv, the list Vitreous keeps by hand from owners’, developers’ and builders’ own releases, council decisions and permit bulletins, checked against the owners’ own words on 12 October 2026; the web address behind every fact is on each battery’s page. Fingrid’s count is its dataset 424, read 18 October 2026, CC BY 4.0. Places from GeoNames, CC BY 4.0. The shaded zones are traced from Fingrid’s connection-application map valid from 1 June 2026, fitted to the coast to within about a kilometre; Fingrid’s own edges are rough. Nothing on this page is modelled, and nothing is a connection queue: Fingrid publishes none.