Company lists · Data refreshed September 2026

Top 25 Sustainable energy companies based in South Africa

Name: Sustainable energy companies based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 428 companies tracked

RevenueBase identified 428 sustainable energy companies headquartered in South Africa as of September 2026 and tracks 4,335 professional contacts across them, including 1,573 with verified work emails. Cape Town is the largest hub.

This list covers sustainable energy companies headquartered in South Africa, 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

428Companies

4,335Contacts tracked

1,573Verified emails

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The 25 largest sustainable energy companies based in South Africa

Ranked by team size

Top 25 of 428 sustainable energy companies based in South Africa, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable energy 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	RED Rocket South Africa PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	51-200	198 contacts →
	Partial evidence “Red Rocket is NERSA-licensed electricty trader and a leading integrated IPP that develops andesigns, constructs, operates, and owns utility-scale, grid-connected renewable energy…” Source: RevenueBase Database · checked Sep 18, 2026
2	Mulilo	Indirect evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	51-200	180 contacts →
	Indirect evidence “Since its establishment in 2008, Mulilo has grown into one of the leading Independent Power Producers (IPP) in Southern Africa.” Source: RevenueBase Database · checked Sep 18, 2026
3	Stage Zero	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	201-500	162 contacts →
	Partial evidence “Stage Zero – Solar & Backup Power Solutions At Stage Zero, we help South Africans achieve energy independence, saving on their electricity bills and protect against load shedding.” Source: RevenueBase Database · checked Sep 18, 2026
4	Solarafrica Energy	Partial evidence	Irene, South AfricaHQ checked Sep 18, 2026	51-200	151 contacts →
	Partial evidence “Founded in 2011, our young company has evolved into a dynamic team passionate about providing simple, sustainable savings to our customers.” Source: RevenueBase Database · checked Sep 18, 2026
5	Solareff	Partial evidence	Johannesburg, South AfricaHQ checked Sep 18, 2026	51-200	128 contacts →
	Partial evidence “Solareff is a specialist South African-based renewable energy solutions company, with a proven track record of installing medium to large-scale rooftop and ground-mounted Solar…” Source: RevenueBase Database · checked Sep 18, 2026
6	ABC Solar SA	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 18, 2026	201-500	122 contacts →
	Indirect evidence “At ABC Solar, we do more than deliver solar infrastructure; we engineer certainty.” Source: RevenueBase Database · checked Sep 18, 2026
7	Gosolr	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 18, 2026	51-200	112 contacts →
	Indirect evidence “GoSolr is here to power your life.” Source: RevenueBase Database · checked Sep 18, 2026
8	Wetility	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 18, 2026	51-200	96 contacts →
	Indirect evidence “In a world where unpredictability has become the norm, people and businesses need more than access to essential services.” Source: RevenueBase Database · checked Sep 18, 2026
9	NOA	Partial evidence	8th Floor, South AfricaHQ checked Sep 18, 2026	51-200	86 contacts →
	Partial evidence “NOA is an energy company.” Source: RevenueBase Database · checked Sep 18, 2026
10	Alumo Energy	Indirect evidence	Pretoria, South AfricaHQ checked Sep 18, 2026	201-500	79 contacts →
	Indirect evidence “We're not your average solar company.” Source: RevenueBase Database · checked Sep 18, 2026
11	Nordex Energy South Africa	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	51-200	78 contacts →
	Partial evidence “Nordex Energy South Africa Ltd.(NESA), boasts a total installed capacity of more than 1GW, making it a market leader with 32% market share on the total installed wind capacity in…” Source: RevenueBase Database · checked Sep 18, 2026
12	Seriti Green	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 18, 2026	51-200	74 contacts →
	Indirect evidence “Seriti Green is owned by Seriti Resources (54.19 %), VennEnergy (15%), RMB (15.41%) and Standard Bank (15.41%), and overseen by its own Board and independent management.” Source: RevenueBase Database · checked Sep 18, 2026
13	Pele Energy Group	Partial evidence	Johannesburg, South AfricaHQ checked Sep 18, 2026	51-200	68 contacts →
	Partial evidence “A sustainable development company.” Source: RevenueBase Database · checked Sep 18, 2026
14	Juwi South Africa	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	51-200	62 contacts →
	Partial evidence “Our aim is to create lasting value for all people through the economic and social benefit of renewable energy.” Source: RevenueBase Database · checked Sep 18, 2026
15	Rhino Energy Solutions	Partial evidence	Sandton, South AfricaHQ checked Sep 18, 2026	51-200	53 contacts →
	Partial evidence “Rhino Energy is committed to addressing South Africa’s energy crisis and the soaring costs of energy.” Source: RevenueBase Database · checked Sep 18, 2026
16	Pele Green Energy	Partial evidence	Johannesburg, South AfricaHQ checked Sep 18, 2026	51-200	51 contacts →
	Partial evidence “Founded in 2009, Pele Green Energy (PGE) is a leading independent power producer dedicated to transforming Africa’s energy landscape through innovative renewable energy solutions.” Source: RevenueBase Database · checked Sep 18, 2026
17	G7 Renewable Energies PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	11-50	49 contacts →
	Partial evidence “G7 Renewable Energies is a fully integrated Independent Power Producer (IPP) and pioneer of utility-scale hybrid renewable energy in South Africa.” Source: RevenueBase Database · checked Sep 18, 2026
18	GC Solar	Partial evidence	Centurion, South AfricaHQ checked Sep 18, 2026	11-50	47 contacts →
	Partial evidence “GC Solar is a leading South African renewable energy system supplier.” Source: RevenueBase Database · checked Sep 18, 2026
19	Genergy South Africa	Partial evidence	Port Elizabeth, South AfricaHQ checked Sep 18, 2026	51-200	43 contacts →
	Partial evidence “Genergy is a renewable energy company with a National Footprint and its Head Quarters based in Gqeberha.” Source: RevenueBase Database · checked Sep 18, 2026
20	Khusela Energies	Partial evidence	Jeffreys Bay, South AfricaHQ checked Sep 18, 2026	11-50	42 contacts →
	Partial evidence “KHUSELA ENERGIES is a company based in Jeffreys Bay, Eastern Cape that specialises in the construction, maintenance and operational support of renewable energy assets.” Source: RevenueBase Database · checked Sep 18, 2026
21	Enertrag South Africa	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	11-50	37 contacts →
	Partial evidence “ENERTRAG South Africa is a clean energy developer and is a subsidiary of ENERTRAG SE, an independent energy company in Germany, France, Ghana, Vietnam, Uruguay and expanding to…” Source: RevenueBase Database · checked Sep 18, 2026
22	Emergent Energy	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	11-50	34 contacts →
	Partial evidence “At Emergent Energy, we believe energy investments should be clear, simple, and designed for long-term value.” Source: RevenueBase Database · checked Sep 18, 2026
23	Solink	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	51-200	27 contacts →
	Partial evidence “SOLINK is a leading technical advisor and project facilitator in the renewable energy sector.” Source: RevenueBase Database · checked Sep 18, 2026
24	Mainstream Renewable Power South Africa	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	51-200	26 contacts →
	Partial evidence “Mainstream Renewable Power is a leading pure-play renewable energy company, with wind and solar assets across global markets, including in South Africa, Latin America, and…” Source: RevenueBase Database · checked Sep 18, 2026
25	RED CAP Energy PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 18, 2026	11-50	24 contacts →
	Partial evidence “Red Cap Energy is a leading South African renewable energy developer.” 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: sustainable energy 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 sustainable energy companies.
Partial evidence: Its own public description names part of sustainable energy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable energy 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 428 sustainable energy companies based in South Africa

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Sustainable energy companies based in South Africa at a glance

As of Sep 18, 2026

36.3%Verified-email coverage

10.1Average contacts per company

11-50Median size (employees)

22.0%Largest-city concentration · Cape Town

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

208

11-50

154

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for South Africa, so it is reported there. Company counts and contact totals on this page are exact for South Africa, over 428 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 sustainable energy 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 South Africa whose own description of what they do matches “sustainable energy 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 sustainable energy 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 sustainable energy companies, and records with no verified work email. Companies headquartered outside South Africa 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, 1,573 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.

Sustainable energy companies by metro

Sustainable energy companies in Cape Town94
Sustainable energy companies in Johannesburg87

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 sustainable energy 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 sustainable energy companies are there based in South Africa?

RevenueBase identified 428 sustainable energy companies headquartered in South Africa 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?

RED Rocket South Africa PTY LTD, headquartered in Cape Town, tops this list with the largest team on record.

Which city has the most sustainable energy companies?

Cape Town leads with 94 headquartered companies, followed by Johannesburg (87) and Pretoria (23).

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 1,573 verified decision-maker contacts tracked across these 428 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.