Company lists · Data refreshed September 2026

Top 25 Solar water heater installation companies based in Belgium

Name: Solar water heater installation companies based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 224 companies tracked

RevenueBase identified 224 solar water heater installation companies headquartered in Belgium as of September 2026 and tracks 1,297 professional contacts across them, including 487 with verified work emails. Antwerpen is the largest hub.

This list covers solar water heater installation companies headquartered in Belgium, 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 18, 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 18, 2026 86% judged on-target in blind review

224Companies

1,297Contacts tracked

487Verified emails

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The 25 largest solar water heater installation companies based in Belgium

Ranked by team size

Top 25 of 224 solar water heater installation companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to solar water heater 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Opteco	Partial evidence	Zonhoven, BelgiumHQ checked Sep 18, 2026	11-50	58 contacts →
	Partial evidence “Met een ervaring van meer dan installaties heeft het management van Opteco de nodige kennis in huis om uw project te realiseren.” Source: RevenueBase Database · checked Sep 18, 2026
2	Energyking	Indirect evidence	Herent, BelgiumHQ checked Sep 18, 2026	51-200	53 contacts →
	Indirect evidence “EnergyKing werd in 2013 opgericht door twee ingenieurs: Lucas & Wiet.” Source: RevenueBase Database · checked Sep 18, 2026
3	MR Solar	Indirect evidence	Zwevegem, BelgiumHQ checked Sep 18, 2026	51-200	51 contacts →
	Indirect evidence “Efficiency Thanks to our advice focused on a sustainable ecosystem, we offer our customers a tailor-made energy solution, resulting in optimal efficiency in both the near and…” Source: RevenueBase Database · checked Sep 18, 2026
4	Insaver	Indirect evidence	Houthalen, BelgiumHQ checked Sep 18, 2026	51-200	45 contacts →
	Indirect evidence “At Insaver, we guide you every step of the way toward a low-carbon future.” Source: RevenueBase Database · checked Sep 18, 2026
5	The Energy Circle	Partial evidence	Hasselt, BelgiumHQ checked Sep 18, 2026	201-500	40 contacts →
	Partial evidence “Van onderhoud & monitoring, elektrische installaties & groene stroom, tot waterbeheer & HVAC-systemen: The Energy Circle heeft alle expertise in huis om grote gebouwen en…” Source: RevenueBase Database · checked Sep 18, 2026
6	Sanitechniek	Partial evidence	Sint-katelijne-waver, BelgiumHQ checked Sep 18, 2026	11-50	37 contacts →
	Partial evidence “Sanitechniek is dé specialist in professionele HVAC-en sanitaire installaties.” Source: RevenueBase Database · checked Sep 18, 2026
7	Enerdeal By EDP	Partial evidence	Zaventem, BelgiumHQ checked Sep 18, 2026	11-50	33 contacts →
	Partial evidence “Enerdeal by EDP supports industrial and public players in their energy transition, turning solar energy into a strategic lever for performance, sustainability and independence.” Source: RevenueBase Database · checked Sep 18, 2026
8	Goessens	Partial evidence	Hannut, BelgiumHQ checked Sep 18, 2026	51-200	31 contacts →
	Partial evidence “Goessens est une société spécialisée dans l'installation de systèmes de chauffage, de ventilation et de climatisation.” Source: RevenueBase Database · checked Sep 18, 2026
9	Futech Bvba	Indirect evidence	Tessenderlo, BelgiumHQ checked Sep 18, 2026	11-50	26 contacts →
	Indirect evidence “Futech is een zonnepaneleninstallateur op de Belgische residentiële en industriële markt.” Source: RevenueBase Database · checked Sep 18, 2026
10	ESE	Indirect evidence	Veurne, BelgiumHQ checked Sep 18, 2026	51-200	24 contacts →
	Indirect evidence “Op maat van elke individuele klant werkt ESE de technisch optimale en meest economische oplossing uit voor hun specifieke energie problemen en dit steeds vanuit een ecologisch…” Source: RevenueBase Database · checked Sep 18, 2026
11	Group VHC	Indirect evidence	Overijse, BelgiumHQ checked Sep 18, 2026	51-200	24 contacts →
	Indirect evidence “Group VHC zorgt al meer dan 25 jaar voor slimme oplossingen in verwarming, koeling, ventilatie en zonne energie.” Source: RevenueBase Database · checked Sep 18, 2026
12	Ecopuur	Indirect evidence	9850, BelgiumHQ checked Sep 18, 2026	11-50	23 contacts →
	Indirect evidence “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Source: RevenueBase Database · checked Sep 18, 2026
13	ENSYS	Indirect evidence	Kapellen, BelgiumHQ checked Sep 18, 2026	11-50	22 contacts →
	Indirect evidence “As specialists in the field of renewable energy and energy efficiency, we offer unique proposals to both individuals and businesses.” Source: RevenueBase Database · checked Sep 18, 2026
14	Belivert	Indirect evidence	Zedelgem, BelgiumHQ checked Sep 18, 2026	51-200	21 contacts →
	Indirect evidence “Vraag gratis je offerte aan, Bespaar dankzij de zonnepanelen van BeliVert heel wat energiekosten.” Source: RevenueBase Database · checked Sep 18, 2026
15	Polarsun	Indirect evidence	Barchon, BelgiumHQ checked Sep 18, 2026	11-50	20 contacts →
	Indirect evidence “Chez Polarsun, nous concevons, installons et assurons le suivi de solutions énergétiques durables pour les particuliers, les entreprises et les collectivités.” Source: RevenueBase Database · checked Sep 18, 2026
16	EGS Group	Indirect evidence	Maasmechelen, BelgiumHQ checked Sep 18, 2026	11-50	20 contacts →
	Indirect evidence “has been active in realizing sustainable projects in Belgium and our neighboring countries since 2012.” Source: RevenueBase Database · checked Sep 18, 2026
17	Energieconcepten	Indirect evidence	Arendonk, BelgiumHQ checked Sep 18, 2026	11-50	19 contacts →
	Indirect evidence “Energieconcepten biedt duurzame energieoplossingen voor het verwarmen, ventileren, verlichten, sturen… van gebouwen.” Source: RevenueBase Database · checked Sep 18, 2026
18	Verisol	Strong evidence	Lummen, BelgiumHQ checked Sep 18, 2026	11-50	19 contacts →
	Strong evidence “Verisol is an expert in the installation of cleantech products including photovoltaic solar installations, solar thermal systems, heat pumps, airconditioning systems, isolation en…” Source: RevenueBase Database · checked Sep 18, 2026
19	Alfasun	Indirect evidence	Ninove, BelgiumHQ checked Sep 18, 2026	11-50	17 contacts →
	Indirect evidence “nergie zonder zorgen Ga je bouwen?” Source: RevenueBase Database · checked Sep 18, 2026
20	Green Energy 4 Seasons S.A	Indirect evidence	Marche-en-famenne, BelgiumHQ checked Sep 18, 2026	11-50	17 contacts →
	Indirect evidence “Green Energy 4 Seasons created in 2008 is the Walloon leader in photovoltaics.” Source: RevenueBase Database · checked Sep 18, 2026
21	IQ Solar BE	Partial evidence	Evergem, BelgiumHQ checked Sep 18, 2026	11-50	16 contacts →
	Partial evidence “IQ Solar specialiseert zich in het kwaliteitsvol installeren van zonnepanelen.” Source: RevenueBase Database · checked Sep 18, 2026
22	LA Temperature Ideale	Partial evidence	Charleroi, BelgiumHQ checked Sep 18, 2026	11-50	14 contacts →
	Partial evidence “LA TEMPERATURE IDEALE Spécialiste de l'installation, de la rénovation et du dépannage de chauffages, nous sommes à même de vous conseiller avant tout travaux que vous désiriez…” Source: RevenueBase Database · checked Sep 18, 2026
23	Intellisol	Partial evidence	Maaseik, BelgiumHQ checked Sep 18, 2026	11-50	12 contacts →
	Partial evidence “Intellisol is een multitechnisch installatie bedrijf met eigen studiebureau uit Maaseik dat gespecialiseerd is in het ontwerpen en plaatsen van energiezuinige installaties, zonder…” Source: RevenueBase Database · checked Sep 18, 2026
24	Mars Solar	Partial evidence	BelgiumHQ checked Sep 18, 2026	51-200	12 contacts →
	Partial evidence “Het MARS SOLAR team heeft ruim 5 jaar ervaring op het gebied van advisering, leveren en monteren van hernieuwbare energie.” Source: RevenueBase Database · checked Sep 18, 2026
25	H&s Powersolutions	Indirect evidence	Hasselt, BelgiumHQ checked Sep 18, 2026	11-50	12 contacts →
	Indirect evidence “H&S Powersolutions is a company that specializes in renewable energy.” Source: RevenueBase Database · checked Sep 18, 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: solar water heater installation companies. 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 solar water heater installation companies.
Partial evidence: Its own public description names part of solar water heater installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name solar water heater installation companies. 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 224 solar water heater installation companies based in Belgium

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Solar water heater installation companies based in Belgium at a glance

As of Sep 18, 2026

37.5%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · Antwerpen

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

133

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 224 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 solar water heater 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 Belgium whose own description of what they do matches “solar water heater 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 solar water heater 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 solar water heater installation companies, and records with no verified work email. Companies headquartered outside Belgium 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, 487 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 18, 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 solar water heater 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 solar water heater installation companies are there based in Belgium?

RevenueBase identified 224 solar water heater installation companies headquartered in Belgium 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?

Opteco, headquartered in Zonhoven, tops this list with the largest team on record.

Which city has the most solar water heater installation companies?

Antwerpen leads with 4 headquartered companies, followed by Arendonk (4) and Maasmechelen (4).

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 487 verified decision-maker contacts tracked across these 224 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 18, 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.