Company lists · Data refreshed September 2026

Top 25 Renewable energy contractors based in Italy

Name: Renewable energy contractors based in Italy
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,713 companies tracked

RevenueBase identified 1,713 renewable energy contractors headquartered in Italy as of September 2026 and tracks 20,911 professional contacts across them, including 4,985 with verified work emails. Roma is the largest hub.

This list covers renewable energy contractors 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 17, 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 17, 2026 86% judged on-target in blind review

1,713Companies

20,911Contacts tracked

4,985Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest renewable energy contractors based in Italy

Ranked by team size

Top 25 of 1,713 renewable energy contractors based in Italy, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy contractors: 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	Enel Green Power	Strong evidence	Roma, ItalyHQ checked Sep 17, 2026	5,001-10,000	5,251 contacts →
	Strong evidence “We are the Enel Group company dedicated to the development and management of renewable energy generation worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
2	SICIM	Strong evidence	Busseto, ItalyHQ checked Sep 17, 2026	10001+	2,404 contacts →
	Strong evidence “SICIM is a leading Worldwide EPC Contractor since 1962, offering all kinds of services related to the production, treatment and transportation of traditional energy sources and…” Source: RevenueBase Database · checked Sep 17, 2026
3	NWG S.P.A	Indirect evidence	Prato, ItalyHQ checked Sep 17, 2026	n/a	766 contacts →
	Indirect evidence “Nata a Prato nel 2003 è oggi una delle più importanti realtà nel mercato della Green Economy.” Source: RevenueBase Database · checked Sep 17, 2026
4	Dolomiti Energia	Indirect evidence	Rovereto, ItalyHQ checked Sep 17, 2026	1,001-5,000	369 contacts →
	Indirect evidence “Rinnovabili.” Source: RevenueBase Database · checked Sep 17, 2026
5	STE Energy	Partial evidence	Padova, ItalyHQ checked Sep 17, 2026	51-200	194 contacts →
	Partial evidence “Since June 2025, STE Energy has been acquired by, becoming part of the world.” Source: RevenueBase Database · checked Sep 17, 2026
6	Espe S.P.A	Indirect evidence	Grantorto, ItalyHQ checked Sep 17, 2026	51-200	144 contacts →
	Indirect evidence “Know-how, experience, reliability, innovation.” Source: RevenueBase Database · checked Sep 17, 2026
7	Algowatt	Strong evidence	Milano, ItalyHQ checked Sep 17, 2026	n/a	137 contacts →
	Strong 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 17, 2026
8	Tozzi Green S.P.A	Partial evidence	Mezzano, ItalyHQ checked Sep 17, 2026	201-500	132 contacts →
	Partial evidence “Tozzi Green è una società specializzata in servizi e progetti per lo sviluppo d’impianti e per la generazione di energia da fonti rinnovabili.” Source: RevenueBase Database · checked Sep 17, 2026
9	Asja Energy	Partial evidence	Rivoli, ItalyHQ checked Sep 17, 2026	201-500	114 contacts →
	Partial evidence “Asja is an International group of companies that design, build and manage renewable power plants.” Source: RevenueBase Database · checked Sep 17, 2026
10	Siel S.P.A	Indirect evidence	Trezzano Rosa, ItalyHQ checked Sep 17, 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 17, 2026
11	Esapro	Partial evidence	Milano, ItalyHQ checked Sep 17, 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 17, 2026
12	PEF SPA	Partial evidence	Barberino Tavarnelle, ItalyHQ checked Sep 17, 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 17, 2026
13	Delos Power	Indirect evidence	Milano, ItalyHQ checked Sep 17, 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 17, 2026
14	Italia GAS E Luce	Strong evidence	Camaiore, ItalyHQ checked Sep 17, 2026	51-200	83 contacts →
	Strong evidence “Advanced industrial knowledge and detailed research help us deliver renewable and cost-effective energy to tens of thousands of businesses and homes around the world.” Source: RevenueBase Database · checked Sep 17, 2026
15	A3sprogetti	Partial evidence	Pescara, ItalyHQ checked Sep 17, 2026	11-50	78 contacts →
	Partial evidence “servizi di progettazione integrata, risparmio energetico, analisi energetiche finalizzate all'energy saving impianti termici impianti elettrici energie alternative.” Source: RevenueBase Database · checked Sep 17, 2026
16	Sunnerg Group	Strong evidence	Milan, ItalyHQ checked Sep 17, 2026	51-200	69 contacts →
	Strong 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 17, 2026
17	Lenergy SPA	Partial evidence	Fornacette, ItalyHQ checked Sep 17, 2026	51-200	68 contacts →
	Partial evidence “In Lenergy, acceleriamo la transizione verso l'indipendenza energetica per famiglie e imprese.” Source: RevenueBase Database · checked Sep 17, 2026
18	Unoenergy Green Solutions SPA	Indirect evidence	Cascina, ItalyHQ checked Sep 17, 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 17, 2026
19	Saccir S.P.A	Partial evidence	Roma, ItalyHQ checked Sep 17, 2026	201-500	61 contacts →
	Partial 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 17, 2026
20	Ranzato Impianti	Partial evidence	Padova, ItalyHQ checked Sep 17, 2026	51-200	59 contacts →
	Partial evidence “Riqualificazione energetica e impianti tecnologici.” Source: RevenueBase Database · checked Sep 17, 2026
21	Energy Italy	Partial evidence	Costermano Sul Garda, ItalyHQ checked Sep 17, 2026	11-50	59 contacts →
	Partial 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 17, 2026
22	EVA Energie Valsabbia	Partial evidence	Gavardo, ItalyHQ checked Sep 17, 2026	51-200	57 contacts →
	Partial evidence “EVA: il tuo partner per un futuro energetico sostenibile.” Source: RevenueBase Database · checked Sep 17, 2026
23	Undo Group	Partial evidence	Rome, ItalyHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial evidence “We produce sustainable energy by covering the entire supply chain from site scouting to the construction and operational management of our power plants.” Source: RevenueBase Database · checked Sep 17, 2026
24	Inergia S.P.A	Indirect evidence	Rome, ItalyHQ checked Sep 17, 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 17, 2026
25	Stanzani S.P.A	Indirect evidence	Sala Bolognese, ItalyHQ checked Sep 17, 2026	51-200	52 contacts →
	Indirect evidence “Serviamo imprese, organizzazioni e persone con progetti e soluzioni di impiantistica personalizzate ed ecosostenibili, in modo rapido e senza sprechi, quando è per loro utile…” Source: RevenueBase Database · checked Sep 17, 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: renewable energy contractors. 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 renewable energy contractors.
Partial evidence: Its own public description names part of renewable energy contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy contractors. 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 1,713 renewable energy contractors based in Italy

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 4,985 reachable decision-makers.

Free signup · no credit card

View the full list →

Renewable energy contractors based in Italy at a glance

As of Sep 17, 2026

23.8%Verified-email coverage

12.2Average contacts per company

1-10Median size (employees)

4.0%Largest-city concentration · Roma

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

852

11-50

680

51-200

128

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 Italy, so it is reported there. Company counts and contact totals on this page are exact for Italy, over 1,713 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 contractors, 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 “renewable energy contractors”. 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 contractors), 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 contractors, 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, 4,985 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 17, 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.

Renewable energy contractors by metro

Renewable energy contractors in Roma69
Renewable energy contractors in Milano40
Renewable energy contractors in Milan36
Renewable energy contractors in Torino30
Renewable energy contractors in Palermo25
Renewable energy contractors in Rome25

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 contractors, 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 contractors are there based in Italy?

RevenueBase identified 1,713 renewable energy contractors 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?

Enel Green Power, headquartered in Roma, tops this list with the largest team on record.

Which city has the most renewable energy contractors?

Roma leads with 69 headquartered companies, followed by Milano (40) and Milan (36).

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 4,985 verified decision-maker contacts tracked across these 1,713 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,713 renewable energy contractors based in Italy. Start with a free account, no credit card.

Download this list →

Related lists

Renewable energy contractors by geography

Browse the directory

Browse: Companies home · All Italy lists · All Renewable energy contractors lists · New 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.