Company lists · Data refreshed September 2026

Top 25 Energy systems integration firms based in Germany

Name: Energy systems integration firms based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,632 companies tracked

RevenueBase identified 1,632 energy systems integration firms headquartered in Germany as of September 2026 and tracks 15,724 professional contacts across them, including 5,893 with verified work emails. Berlin is the largest hub.

This list covers energy systems integration firms headquartered in Germany, 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 28, 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 28, 2026 86% judged on-target in blind review

1,632Companies

15,724Contacts tracked

5,893Verified emails

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The 25 largest energy systems integration firms based in Germany

Ranked by team size

Top 25 of 1,632 energy systems integration firms based in Germany, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy systems integration firms: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Innio Group	Partial evidence	Munich, GermanyHQ checked Sep 28, 2026	1,001-5,000	2,111 contacts →
	Partial evidence “INNIO Group is a global distributed energy solutions provider that delivers reliable, flexible, transient, decentralized, modular and efficient power.” Source: RevenueBase Database · checked Sep 28, 2026
2	ABO Energy	Partial evidence	Wiesbaden, GermanyHQ checked Sep 28, 2026	1,001-5,000	785 contacts →
	Partial evidence “Founded in 1996, ABO Energy (fomerly known as ABO Wind) is among Europe’s leading developers of renewable energy projects.” Source: RevenueBase Database · checked Sep 28, 2026
3	Kraftanlagen Energies & Services	Partial evidence	Munich, GermanyHQ checked Sep 28, 2026	1,001-5,000	456 contacts →
	Partial evidence “Kraftanlagen Energies & Services – Solutions for the future Kraftanlagen Energies & Services is part of the French group Bouygues SA.” Source: RevenueBase Database · checked Sep 28, 2026
4	IQONY	Partial evidence	Essen, GermanyHQ checked Sep 28, 2026	1,001-5,000	395 contacts →
	Partial evidence “Iqony makes green energy feasible.” Source: RevenueBase Database · checked Sep 28, 2026
5	Goldbeck Solar Group	Partial evidence	Hirschberg An Der Bergstraße, GermanyHQ checked Sep 28, 2026	501-1,000	336 contacts →
	Partial evidence “GOLDBECK SOLAR is an internationally leading company specializing in the turnkey construction of industrial, commercial, and large‑scale photovoltaic systems.” Source: RevenueBase Database · checked Sep 28, 2026
6	Energiekonzepte Deutschland Gmbh	Indirect evidence	Leipzig, GermanyHQ checked Sep 28, 2026	201-500	334 contacts →
	Indirect evidence “Mit über installierten Anlagen und einem umfassenden Netzwerk aus Fachkräften sorgen wir jedes Jahr für circa 70 Millionen € Stromersparnis bei unseren Kundinnen und Kunden.” Source: RevenueBase Database · checked Sep 28, 2026
7	Maxsolar Gmbh	Partial evidence	Traunstein, GermanyHQ checked Sep 28, 2026	201-500	210 contacts →
	Partial evidence “MaxSolar is a leading provider of integrated, innovative energy solutions for companies and municipalities.” Source: RevenueBase Database · checked Sep 28, 2026
8	IBC Solar AG	Partial evidence	Bad Staffelstein, GermanyHQ checked Sep 28, 2026	201-500	196 contacts →
	Partial evidence “IBC SOLAR ist ein führender globaler Anbieter von Lösungen und Dienstleistungen im Bereich Photovoltaik und Energiespeicher.” Source: RevenueBase Database · checked Sep 28, 2026
9	Energiequelle Gmbh	Partial evidence	Zossen, GermanyHQ checked Sep 28, 2026	201-500	189 contacts →
	Partial evidence “About us We have been active in the renewable energy market since 1997.” Source: RevenueBase Database · checked Sep 28, 2026
10	Tesvolt AG	Partial evidence	Lutherstadt Wittenberg, GermanyHQ checked Sep 28, 2026	201-500	158 contacts →
	Partial evidence “TESVOLT AG is a German provider and system integrator of battery storage systems for commercial, industrial, and utility-scale applications.” Source: RevenueBase Database · checked Sep 28, 2026
11	SAR Elektronic Gmbh	Indirect evidence	Dingolfing, GermanyHQ checked Sep 28, 2026	501-1,000	153 contacts →
	Indirect evidence “SAR Group – Wertschöpfung durch Automatisierung Die SAR Group ist seit 1985 Ihr zuverlässiger Partner für professionelle Industrie- und Prozessautomatisierung.” Source: RevenueBase Database · checked Sep 28, 2026
12	ENTER	Strong evidence	Berlin, GermanyHQ checked Sep 28, 2026	51-200	136 contacts →
	Strong evidence “Enter ist ein bundesweit tätiger Anbieter von Wärmepumpen, Solaranlagen (Photovoltaik) mit Stromspeicher, Wallboxen und Energiemanagement-Systemen für Eigenheimbesitzer in…” Source: RevenueBase Database · checked Sep 28, 2026
13	Schoenergie	Partial evidence	Föhren, GermanyHQ checked Sep 28, 2026	201-500	134 contacts →
	Partial evidence “Unabhängigkeit & Energiehoheit gewinnen, Kosten selbststimmt steuern: Schoenergie entwickelt, plant, baut und betreibt nachhaltige Energielösungen für Menschen, Unternehmen und…” Source: RevenueBase Database · checked Sep 28, 2026
14	Enviria	Partial evidence	Frankfurt, GermanyHQ checked Sep 28, 2026	51-200	132 contacts →
	Partial evidence “Since 2017, ENVIRIA develops comprehensive, integrated energy solutions for commercial and industrial clients.” Source: RevenueBase Database · checked Sep 28, 2026
15	Fenecon	Strong evidence	Iggensbach, GermanyHQ checked Sep 28, 2026	201-500	130 contacts →
	Strong evidence “FENECON is a leading manufacturer of energy storage solutions and offers systems for private households as well as for trade, industry, utility companies and vehicle manufacturers.” Source: RevenueBase Database · checked Sep 28, 2026
16	SMA Altenso	Partial evidence	Niestetal, GermanyHQ checked Sep 28, 2026	51-200	102 contacts →
	Partial evidence “power for energy SMA Altenso GmbH is a wholly owned subsidiary of SMA Solar Technology AG.” Source: RevenueBase Database · checked Sep 28, 2026
17	Einhundert	Partial evidence	Köln, GermanyHQ checked Sep 28, 2026	51-200	87 contacts →
	Partial evidence “Your partner for the energy transition in the real estate industry Since 2017, einhundert Energie GmbH has been supporting real estate companies in electrifying and decarbonizing…” Source: RevenueBase Database · checked Sep 28, 2026
18	Müller Bleher Group	Indirect evidence	Filderstadt, GermanyHQ checked Sep 28, 2026	201-500	87 contacts →
	Indirect evidence “Die Müller Bleher Group ist ein seit über 30 Jahren bestehendes und erfolgreiches Ingenieurbüro für die elektrotechnische Gebäudeausrüstung.” Source: RevenueBase Database · checked Sep 28, 2026
19	BLS Energieplan Gmbh	Partial evidence	Berlin, GermanyHQ checked Sep 28, 2026	51-200	82 contacts →
	Partial evidence “Die BLS Energieplan GmbH wurde 1984 gegründet und hat ihr Portfolio an Ingenieurdienstleistungen seither kontinuierlich erweitert.” Source: RevenueBase Database · checked Sep 28, 2026
20	Greenflash	Partial evidence	Essen, GermanyHQ checked Sep 28, 2026	51-200	81 contacts →
	Partial evidence “Wir als End-to-End Partner denken Energie ganzheitlich, wie kein anderer: Wir realisieren die Energieversorgung unserer Kunden als integriertes Gesamtsystem und übernehmen dabei…” Source: RevenueBase Database · checked Sep 28, 2026
21	Ecoplanet	Partial evidence	Munich, GermanyHQ checked Sep 28, 2026	51-200	80 contacts →
	Partial evidence “ecoplanet ist die weltweite erste Software für integriertes Energiemanagement: Verbrauchssteuerung, intelligente Beschaffung und Regulatorik an einem Ort & KI-basiert optimiert.” Source: RevenueBase Database · checked Sep 28, 2026
22	Intelligent Energy System Services Gmbh Ie2s	Indirect evidence	Stuttgart, GermanyHQ checked Sep 28, 2026	51-200	79 contacts →
	Indirect evidence “Herausforderungen von Heute als Chancen für Morgen nutzen.” Source: RevenueBase Database · checked Sep 28, 2026
23	Empact Gmbh	Indirect evidence	Köln, GermanyHQ checked Sep 28, 2026	51-200	73 contacts →
	Indirect evidence “Wir bringen grüne Infrastruktur in Ihre Gebäude!” Source: RevenueBase Database · checked Sep 28, 2026
24	Be.Storaged Gmbh	Indirect evidence	Oldenburg, GermanyHQ checked Sep 28, 2026	51-200	71 contacts →
	Indirect evidence “Wir als be.storaged entwickeln und realisieren ganzheitliche Batteriespeicherlösungen - von der Projektentwicklung über Engineering und Bau bis hin zu Betrieb und Wartung…” Source: RevenueBase Database · checked Sep 28, 2026
25	Beegy Gmbh	Partial evidence	Mannheim-neckarau, GermanyHQ checked Sep 28, 2026	201-500	68 contacts →
	Partial evidence “beegy ist ein innovativer Anbieter ganzheitlicher Energielösungen und eine 100-prozentige Tochter der MVV Energie AG.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: energy systems integration firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names energy systems integration firms.
Partial evidence: Its own public description names part of energy systems integration firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy systems integration firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,632 energy systems integration firms based in Germany

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Energy systems integration firms based in Germany at a glance

As of Sep 28, 2026

37.5%Verified-email coverage

9.6Average contacts per company

1-10Median size (employees)

5.5%Largest-city concentration · Berlin

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

854

11-50

484

51-200

158

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 1,632 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 energy systems integration firms, 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 Germany whose own description of what they do matches “energy systems integration firms”. 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 energy systems integration firms), 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 energy systems integration firms, and records with no verified work email. Companies headquartered outside Germany 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, 5,893 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 28, 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.

Energy systems integration firms by metro

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 energy systems integration firms, 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 energy systems integration firms are there based in Germany?

RevenueBase identified 1,632 energy systems integration firms headquartered in Germany 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?

Innio Group, headquartered in Munich Germany, tops this list with the largest team on record.

Which city has the most energy systems integration firms?

Berlin leads with 89 headquartered companies, followed by Hamburg (46) and Stuttgart (24).

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 5,893 verified decision-maker contacts tracked across these 1,632 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 28, 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 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.