Company lists · Data refreshed September 2026

Top 25 Commercial solar power installation companies based in Italy

Name: Commercial solar power installation companies based in Italy
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 1,601 companies tracked

RevenueBase identified 1,601 commercial solar power installation companies headquartered in Italy as of September 2026 and tracks 11,785 professional contacts across them, including 2,675 with verified work emails. Roma is the largest hub.

This list covers commercial solar power installation companies headquartered in Italy, 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 15, 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 15, 2026 86% judged on-target in blind review

1,601Companies

11,785Contacts tracked

2,675Verified emails

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The 25 largest commercial solar power installation companies based in Italy

Ranked by team size

Top 25 of 1,601 commercial solar power installation companies based in Italy, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to commercial solar power 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	Stern Energy	Indirect evidence	Parma, ItalyHQ checked Sep 15, 2026	201-500	205 contacts →
	Indirect evidence “Stern Energy, founded in 2008, is an Italy-based company specialized in technical services for photovoltaic plants and BESS systems.” Source: RevenueBase Database · checked Sep 15, 2026
2	STE Energy	Indirect evidence	Padova, ItalyHQ checked Sep 15, 2026	51-200	194 contacts →
	Indirect evidence “Since June 2025, STE Energy has been acquired by, becoming part of the world.” Source: RevenueBase Database · checked Sep 15, 2026
3	Espe S.P.A	Indirect evidence	Grantorto, ItalyHQ checked Sep 15, 2026	51-200	144 contacts →
	Indirect evidence “Know-how, experience, reliability, innovation.” Source: RevenueBase Database · checked Sep 15, 2026
4	Algowatt	Indirect evidence	Milano, ItalyHQ checked Sep 15, 2026	n/a	137 contacts →
	Indirect evidence “TerniEnergia is active in the energies from renewable sources business, particularly in the photovoltaic segment, where it operates as a system integrator.” Source: RevenueBase Database · checked Sep 15, 2026
5	Siel S.P.A	Indirect evidence	Trezzano Rosa, ItalyHQ checked Sep 15, 2026	51-200	100 contacts →
	Indirect evidence “In its current structure, Siel Group is a holding company deeply rooted in a world-class economic, technological, and cultural context.” Source: RevenueBase Database · checked Sep 15, 2026
6	Esapro	Partial evidence	Milano, ItalyHQ checked Sep 15, 2026	51-200	98 contacts →
	Partial evidence “We have more than 10 years’ experience in designing, building and managing renewable power plant and an enviable track record in the maintenance, revamping and 24/7 surveillance…” Source: RevenueBase Database · checked Sep 15, 2026
7	Sunprime	Partial evidence	Milan, ItalyHQ checked Sep 15, 2026	51-200	97 contacts →
	Partial evidence “Sunprime è un Independent Power Producer nel settore fotovoltaico in rapida crescita con sede a Milano.” Source: RevenueBase Database · checked Sep 15, 2026
8	Senec Italia	Indirect evidence	Bari, ItalyHQ checked Sep 15, 2026	51-200	94 contacts →
	Indirect evidence “Nata nel 2009 a Lipsia (Germania), SENEC sviluppa e produce sistemi d’accumulo intelligenti ed offre una gamma completa di prodotti e servizi per l’autosufficienza energetica.” Source: RevenueBase Database · checked Sep 15, 2026
9	PEF SPA	Partial evidence	Barberino Tavarnelle, ItalyHQ checked Sep 15, 2026	11-50	93 contacts →
	Partial evidence “PEF SpA nasce a Firenze nel 2006, iniziando ad operare nel settore delle energie rinnovabili, con la commercializzazione su tutto il territorio nazionale di impianti fotovoltaici…” Source: RevenueBase Database · checked Sep 15, 2026
10	Delos Power	Indirect evidence	Milano, ItalyHQ checked Sep 15, 2026	51-200	85 contacts →
	Indirect evidence “Ogni giorno, lavoriamo per generare un impatto positivo sull'ambiente e sulla società.” Source: RevenueBase Database · checked Sep 15, 2026
11	A3sprogetti	Indirect evidence	Pescara, ItalyHQ checked Sep 15, 2026	11-50	78 contacts →
	Indirect evidence “servizi di progettazione integrata, risparmio energetico, analisi energetiche finalizzate all'energy saving impianti termici impianti elettrici energie alternative.” Source: RevenueBase Database · checked Sep 15, 2026
12	Solar Energy Group SPA	Partial evidence	San Daniele Del Friuli, ItalyHQ checked Sep 15, 2026	51-200	73 contacts →
	Partial evidence “Solar Energy Group Spa è una completa realtà progettuale e produttiva nel settore dei sistemi solari termici e fotovoltaici.” Source: RevenueBase Database · checked Sep 15, 2026
13	Sunnerg Group	Indirect evidence	Milan, ItalyHQ checked Sep 15, 2026	51-200	69 contacts →
	Indirect evidence “WHO WE ARE SUNNERG is General Contractor and Service Provider specializing in "turnkey projects" in the 'Energy & Facility Management B2B market, with a particular focus on the PV…” Source: RevenueBase Database · checked Sep 15, 2026
14	Lenergy SPA	Indirect evidence	Fornacette, ItalyHQ checked Sep 15, 2026	51-200	68 contacts →
	Indirect evidence “In Lenergy, acceleriamo la transizione verso l'indipendenza energetica per famiglie e imprese.” Source: RevenueBase Database · checked Sep 15, 2026
15	Unoenergy Green Solutions SPA	Indirect evidence	Cascina, ItalyHQ checked Sep 15, 2026	201-500	63 contacts →
	Indirect evidence “Unoenergy Green Solutions è una società del Gruppo Unoenergy che opera su tutto il territorio nazionale attraverso la vendita e l’installazione di sistemi per l’efficientamento…” Source: RevenueBase Database · checked Sep 15, 2026
16	Enpal Italia	Indirect evidence	Milan, ItalyHQ checked Sep 15, 2026	11-50	62 contacts →
	Indirect evidence “Energia pulita accessibile a tutti: questo è il sogno di Enpal.” Source: RevenueBase Database · checked Sep 15, 2026
17	Gesco SPA	Indirect evidence	Monteriggioni, ItalyHQ checked Sep 15, 2026	51-200	62 contacts →
	Indirect evidence “Entra nel mondo di Gesco SpA e scopri con noi come costruire un futuro sostenibile.” Source: RevenueBase Database · checked Sep 15, 2026
18	Saccir S.P.A	Indirect evidence	Roma, ItalyHQ checked Sep 15, 2026	201-500	61 contacts →
	Indirect evidence “Nata nel 1938, SACCIR è parte del gruppo SAMOVAR ha accompagnato l’evoluzione dell’energia in Italia, diventando un punto di riferimento nel settore dei multiservizi tecnologici.” Source: RevenueBase Database · checked Sep 15, 2026
19	Ranzato Impianti	Indirect evidence	Padova, ItalyHQ checked Sep 15, 2026	51-200	59 contacts →
	Indirect evidence “Riqualificazione energetica e impianti tecnologici.” Source: RevenueBase Database · checked Sep 15, 2026
20	Energy Italy	Indirect evidence	Costermano Sul Garda, ItalyHQ checked Sep 15, 2026	11-50	59 contacts →
	Indirect evidence “Energy Italy SpA, azienda parte del gruppo Energy Holding, dal 2012 è tra le realtà più innovative nel settore delle energie rinnovabili e del risparmio energetico.” Source: RevenueBase Database · checked Sep 15, 2026
21	EVA Energie Valsabbia	Indirect evidence	Gavardo, ItalyHQ checked Sep 15, 2026	51-200	57 contacts →
	Indirect evidence “EVA: il tuo partner per un futuro energetico sostenibile.” Source: RevenueBase Database · checked Sep 15, 2026
22	Inergia S.P.A	Indirect evidence	Rome, ItalyHQ checked Sep 15, 2026	11-50	53 contacts →
	Indirect evidence “Inergia was founded in 2003 with the strategic diversification of the Santarelli group, a leader in Italy’s real estate industry.” Source: RevenueBase Database · checked Sep 15, 2026
23	TEN Project	Indirect evidence	San Martino Sannita, ItalyHQ checked Sep 15, 2026	11-50	52 contacts →
	Indirect evidence “L’ambito principale di attività riguarda la progettazione, la realizzazione e la gestione di infrastrutture elettriche e di impianti di produzione di energia da fonti rinnovabili…” Source: RevenueBase Database · checked Sep 15, 2026
24	Braga Group	Indirect evidence	Agrate Brianza, ItalyHQ checked Sep 15, 2026	51-200	47 contacts →
	Indirect evidence “Braga Group: il tuo partner per la transizione energetica.” Source: RevenueBase Database · checked Sep 15, 2026
25	GIN Group	Indirect evidence	Milano, ItalyHQ checked Sep 15, 2026	n/a	47 contacts →
	Indirect evidence “La GIN GROUP è una società giovane e dinamica, creata da tre professionisti che hanno maturato la loro esperienza nel campo dell’energia alternativa attraverso l’importazione e la…” Source: RevenueBase Database · checked Sep 15, 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: commercial solar power 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 commercial solar power installation companies.
Partial evidence: Its own public description names part of commercial solar power installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial solar power 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 1,601 commercial solar power installation companies based in Italy

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Commercial solar power installation companies based in Italy at a glance

As of Sep 15, 2026

22.7%Verified-email coverage

7.4Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · Roma

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

819

11-50

618

51-200

116

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Italy, so it is reported there. Company counts and contact totals on this page are exact for Italy, over 1,601 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 commercial solar power 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 Italy whose own description of what they do matches “commercial solar power 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 commercial solar power 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 commercial solar power installation companies, and records with no verified work email. Companies headquartered outside Italy 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, 2,675 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 15, 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.

Commercial solar power installation companies by metro

Commercial solar power installation companies in Roma59
Commercial solar power installation companies in Milan38
Commercial solar power installation companies in Milano37
Commercial solar power installation companies in Torino28

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 commercial solar power 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 commercial solar power installation companies are there based in Italy?

RevenueBase identified 1,601 commercial solar power installation companies headquartered in Italy 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?

Stern Energy, headquartered in Parma, tops this list with the largest team on record.

Which city has the most commercial solar power installation companies?

Roma leads with 59 headquartered companies, followed by Milan (38) and Milano (37).

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 2,675 verified decision-maker contacts tracked across these 1,601 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 15, 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.