Company lists · Data refreshed September 2026

Top 25 Renewable energy storage installation companies based in Finland

RevenueBase identified 64 renewable energy storage installation companies headquartered in Finland as of September 2026 and tracks 2,159 professional contacts across them, including 1,011 with verified work emails. Helsinki is the largest hub.

This list covers renewable energy storage installation companies headquartered in Finland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review
64Companies
2,159Contacts tracked
1,011Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest renewable energy storage installation companies based in Finland

Ranked by team size
Top 25 of 64 renewable energy storage installation companies based in Finland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy storage installation companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceHelsinki, FinlandHQ checked Sep 16, 202610001+940 contacts →

Strong evidence

“Wärtsilä leads the transition towards a 100% renewable energy future.”

Source: RevenueBase Database · checked Sep 16, 2026
2Partial evidenceEspoo, FinlandHQ checked Sep 16, 202651-200119 contacts →

Partial evidence

“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.”

Source: RevenueBase Database · checked Sep 16, 2026
3Strong evidenceYlöjärvi, FinlandHQ checked Sep 16, 202651-200114 contacts →

Strong evidence

“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…”

Source: RevenueBase Database · checked Sep 16, 2026
4Strong evidenceHelsinki, FinlandHQ checked Sep 16, 202651-20068 contacts →

Strong evidence

“Ilmatar is a leading Independent Power Producer (IPP) and renewable energy developer in the Nordics.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceKempele, FinlandHQ checked Sep 16, 202611-5063 contacts →

Indirect evidence

“Virta päällä vihreässä siirtymässä.”

Source: RevenueBase Database · checked Sep 16, 2026
6Strong evidenceKempele, FinlandHQ checked Sep 16, 202651-20062 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
7Strong evidenceHelsinki, FinlandHQ checked Sep 16, 202651-20048 contacts →

Strong evidence

“Korkia is a global investor and developer accelerating the transition to renewable energy.”

Source: RevenueBase Database · checked Sep 16, 2026
8Indirect evidenceHelsinki, FinlandHQ checked Sep 16, 202651-20045 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
9Strong evidenceVaasa, FinlandHQ checked Sep 16, 202651-20037 contacts →

Strong evidence

“NEPower delivers electrification solutions for the industrial, grid and renewable energy sectors.”

Source: RevenueBase Database · checked Sep 16, 2026
10Partial evidenceHelsinki, FinlandHQ checked Sep 16, 202611-5036 contacts →

Partial evidence

“ABO Energy on menestyksekkäästi kehittänyt, rakentanut ja operoinut uusiutuvaa energiaa jo lähes 30 vuoden ajan ja on yksi Euroopan kokeneimmista alan toimijoista.”

Source: RevenueBase Database · checked Sep 16, 2026
11Partial evidenceHelsinki, FinlandHQ checked Sep 16, 202611-5033 contacts →

Partial evidence

Energiequelle on kansainvälinen hankekehittäjä alanaan suunnitella, rakentaa ja hallinnoida tuuli, biokaasu- ja aurinkovoimaloita, sähköasemia sekä energian…”

Source: RevenueBase Database · checked Sep 16, 2026
12Indirect evidenceEspoo, FinlandHQ checked Sep 16, 202611-5028 contacts →

Indirect evidence

“At 1KOMMA5° Suomi (formerly Solar Age Oy), we believe in making it easy for people to access solar power solutions for their homes, businesses, and farms.”

Source: RevenueBase Database · checked Sep 16, 2026
13Strong evidenceTampere, FinlandHQ checked Sep 16, 20261-1022 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceVantaa, FinlandHQ checked Sep 16, 202611-5019 contacts →

Indirect evidence

“Olemme kotimainen toimija ja kokenut aurinkoenergian asiantuntija.”

Source: RevenueBase Database · checked Sep 16, 2026
15Strong evidenceLappeenranta, FinlandHQ checked Sep 16, 202611-5017 contacts →

Strong evidence

“With its power-to-heat thermal energy storage innovation - and as a one of the front runners in the world in this sector - Elstor Oy transforms steam and heat production to zero…”

Source: RevenueBase Database · checked Sep 16, 2026
16Strong evidenceHelsinki, FinlandHQ checked Sep 16, 202611-5016 contacts →

Strong evidence

“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…”

Source: RevenueBase Database · checked Sep 16, 2026
17Partial evidenceVasa, FinlandHQ checked Sep 16, 202611-5012 contacts →

Partial evidence

“Comsel System is a product design and development company specialized in development and industrialization engineering for the energy sector.”

Source: RevenueBase Database · checked Sep 16, 2026
18Partial evidenceHelsinki, FinlandHQ checked Sep 16, 202611-5011 contacts →

Partial evidence

“Eolus on yksi pohjoismaiden johtavista uusiutuvan energian hankekehittäjistä.”

Source: RevenueBase Database · checked Sep 16, 2026
19Strong evidenceHelsinki, FinlandHQ checked Sep 16, 20261-1011 contacts →

Strong evidence

“Olana is an energy storage company.”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceOulu, FinlandHQ checked Sep 16, 202611-5010 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
21Strong evidenceTampere, FinlandHQ checked Sep 16, 20261-107 contacts →

Strong evidence

“TheStorage is a Finnish climate-tech company developing scalable, sand-based thermal energy storage systems.”

Source: RevenueBase Database · checked Sep 16, 2026
22Partial evidenceLappeenranta, FinlandHQ checked Sep 16, 20261-107 contacts →

Partial evidence

“The demand for clean and sustainable energy is increasing, putting pressure on the energy industry to meet the demand.”

Source: RevenueBase Database · checked Sep 16, 2026
23Partial evidenceHelsinki, FinlandHQ checked Sep 16, 20261-107 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
24Partial evidenceHelsinki, FinlandHQ checked Sep 16, 20261-105 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
25Partial evidenceEspoo, FinlandHQ checked Sep 16, 20261-105 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 64 renewable energy storage installation companies based in Finland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,011 reachable decision-makers.

Free signup · no credit card

View the full list →

Renewable energy storage installation companies based in Finland at a glance

As of Sep 16, 2026
46.8%Verified-email coverage
33.7Average contacts per company
1-10Median size (employees)
28.1%Largest-city concentration · Helsinki
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
34
11-50
18
51-200
10
501-1,000
1
10001+
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 64 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among renewable energy storage installation companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Finland whose own description of what they do matches “renewable energy storage installation companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names renewable energy storage installation companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among renewable energy storage installation companies, and records with no verified work email. Companies headquartered outside Finland are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,011 across the full list. 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 September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names renewable energy storage installation companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many renewable energy storage installation companies are there based in Finland?

RevenueBase identified 64 renewable energy storage installation companies headquartered in Finland as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Wärtsilä Energy, headquartered in Helsinki, tops this list with the largest team on record.

Which city has the most renewable energy storage installation companies?

Helsinki leads with 18 headquartered companies, followed by Espoo (6) and Tampere (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,011 verified decision-maker contacts tracked across these 64 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 64 renewable energy storage installation companies based in Finland. Start with a free account, no credit card.

Download this list →

Related lists

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 Smart Search, 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.