Company lists · Data refreshed October 2026

Top 15 Battery energy storage developers based in Finland

RevenueBase identified 26 company matches for battery energy storage developers associated with Finland as of October 2026 and tracks 705 professional contacts across them, including 279 with verified work emails. Helsinki is the largest hub.

This list covers company matches for battery energy storage developers associated with Finland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 8, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 8, 2026 How this list was built
26Companies
705Contacts tracked
279Verified emails
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The 15 largest battery energy storage developers based in Finland

Ranked by team size
Top 15 of 26 company matches for battery energy storage developers based in Finland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 8, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchEspoo, FinlandHQ recorded Oct 8, 202651-200119 contacts →

Exact match

“Founded in 1975 in Finland, Efore Telecom Finland Oy has grown from a six-person engineering office into a global energy solutions provider with five decades of expertise.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
2Exact matchYlöjärvi, FinlandHQ recorded Oct 8, 202651-200114 contacts →

Exact match

“Merus Power is a technology company headquartered in the city of Ylöjärvi, Finland where we design and manufacture innovative Finnish battery energy storage systems and power…”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
3Exact matchKempele, FinlandHQ recorded Oct 8, 202611-5063 contacts →

Exact match

“Virta päällä vihreässä siirtymässä.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
4Exact matchKempele, FinlandHQ recorded Oct 8, 202651-20062 contacts →

Exact match

“Cactos develops distributed energy storage systems based on batteries.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
5Exact matchHelsinki, FinlandHQ recorded Oct 8, 202651-20045 contacts →

Exact match

“One turn-key service to trade, optimize, and operate your battery.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
6Exact matchTampere, FinlandHQ recorded Oct 8, 20261-1022 contacts →

Exact match

“Enico offers wide-ranging production, manufacturing and project services in the field of renewable energy.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
7Exact matchHelsinki, FinlandHQ recorded Oct 8, 202611-5016 contacts →

Exact match

“Ampner Oy – Power Engineering & DC Power Solutions for a Renewable Future Ampner is a Finnish technology company specialized in connecting renewable energy, energy storage systems…”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
8Exact matchEspoo, FinlandHQ recorded Oct 8, 202611-5013 contacts →

Exact match

“Celltech Oy is one of the leading battery suppliers in Finland with over 30 years of experience.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
9Exact matchHelsinki, FinlandHQ recorded Oct 8, 202611-5013 contacts →

Exact match

“Rebelvolt makes mobile e-Generators, large batteries that can completely replace the need for diesel generators.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
10Exact matchHelsinki, FinlandHQ recorded Oct 8, 20261-1011 contacts →

Exact match

“Olana is an energy storage company.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
11Exact matchHelsinki, FinlandHQ recorded Oct 8, 202611-5010 contacts →

Exact match

“Geyser Batteries is a Finnish cleantech startup developing and producing a new generation of safe and sustainable power batteries using proprietary water-based electrochemistry.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
12Exact matchHelsinki, FinlandHQ recorded Oct 8, 20261-107 contacts →

Exact match

“Will & Must is a Helsinki-based developer of energy and infrastructure projects, founded in 2022.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
13Exact matchHelsinki, FinlandHQ recorded Oct 8, 20261-105 contacts →

Exact match

“Usva Energia on perustettu vastaamaan uusiutuvan energian lisääntymisen aiheuttamiin haasteisiin verkon vakaudelle.”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
14Exact matchEspoo, FinlandHQ recorded Oct 8, 20261-105 contacts →

Exact match

“Halide Energy manufactures cost-effective, high performing, and sustainable copper flow batteries to enable grid-scale and industrial adopters to overcome their long duration…”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase
15Exact matchTampere, FinlandHQ recorded Oct 8, 20261-105 contacts →

Exact match

“Fastest urban BESS deployment with maximum return on investment for the customer At GreenGen, we provide full-service Battery Energy Storage System (BESS) solutions designed for…”

Recorded in the RevenueBase company graph · Oct 8, 2026 · View company records in RevenueBase

Showing 15 of 26 battery energy storage developers based in Finland

See the full list, filter by size, metro and specialty, and access 279 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Battery energy storage developers based in Finland at a glance

As of Oct 8, 2026
39.6%Verified-email coverage
27.1Average contacts per company
11-50Median size (employees)
38.5%Largest-city concentration · Helsinki
Oct 8, 2026Page data refreshed

Companies by employee count

1-10
12
11-50
7
51-200
6
501-1,000
1

Email recency for this list is measured worldwide rather than for Finland, so it is reported there. Company counts and contact totals on this page are exact for Finland, over 26 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Finland whose business descriptions match “battery energy storage developers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 279 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 8, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “battery energy storage developers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many battery energy storage developers are there based in Finland?

RevenueBase identified 26 company matches for battery energy storage developers associated with Finland as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

EFORE tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most battery energy storage developers?

Helsinki leads with 10 company records, followed by Tampere (5) and Espoo (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 279 professional contacts with verified work emails tracked across these 26 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 8, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.