Top 10 Best Solar Installation Companies in South Africa for Homes and Offices in 2026

1. SOLA Group

If there is one company that encapsulates South Africa's renewable energy ambitions at scale, it is SOLA Group. Founded in Cape Town in 2008, long before load shedding became a household term, SOLA has grown into the country's preeminent independent renewable energy developer. The numbers speak plainly: more than 2,750 MW of commercial and industrial solar capacity developed, over 100 projects delivered across all nine provinces, and a growing international footprint spanning Namibia, Mozambique, and the Seychelles.

What distinguishes SOLA from the pack is its vertically integrated model. Through subsidiaries SOLA Build, SOLA Assets, and SOLA Operations, the company handles everything from system engineering and procurement through to construction, long-term asset management, and energy wheeling. In October 2025, SOLA brought the Springbok Solar Power Project online in the Free State, a facility capable of generating approximately 430 GWh annually, enough to power around 150,000 homes. Clients purchasing that energy include Amazon, Rio Tinto, Vodacom, and Old Mutual. The firm's latest milestone is the Naos-1 hybrid solar and battery project near Viljoenskroon, a 300 MW solar facility paired with 660 MWh of battery storage that, when commissioned in 2028, will become South Africa's largest privately contracted hybrid renewable energy project. For commercial and industrial clients seeking serious scale and proven delivery, SOLA Group remains the benchmark.

2. Alumo Energy

Alumo Energy has earned a reputation as one of South Africa's most trusted residential solar installers, and that trust was not built through advertising alone. Based in Pretoria and operating since 2017, Alumo runs an entirely in-house operation. Their solar advisors, engineers, and installation technicians are all direct employees rather than subcontractors, a distinction that translates into tighter quality control and more consistent workmanship.

Every installation is backed by a three-year workmanship guarantee alongside manufacturer warranties on panels and inverters, and the company's 24/7 after-sales support line reflects a genuine commitment to long-term client relationships. Alumo uses NRS-approved equipment exclusively and has built a strong following among Gauteng homeowners, with verified Google reviews consistently placing them among the highest-rated installers in the province. The directors personally guarantee every job, a level of accountability that is rare in an industry where too many operators vanish after the final invoice is paid.

3. SolarAfrica Energy

SolarAfrica Energy, headquartered in Centurion, has quietly assembled one of the largest portfolios of commercial and industrial rooftop solar assets in the country. With approximately 90 MW of installed capacity spread across 134 different sites, the company has established itself as a go-to partner for businesses seeking to reduce electricity costs without the capital outlay of purchasing a system outright.

The company's commercial model centres on power purchase agreements, where SolarAfrica finances, installs, owns, and maintains the solar infrastructure on a client's rooftop while selling the generated electricity back at rates below municipal tariffs. A landmark R635 million investment finalised in early 2026, backed by Vantage Capital and Greenpoint Capital, gave SolarAfrica full ownership of its asset-holding subsidiary and signalled strong market confidence in the distributed energy model. For medium to large businesses looking for a financially sophisticated partner with deep experience in commercial rooftop solar, SolarAfrica is a compelling choice.

4. Hohm Energy

Hohm Energy has taken a fundamentally different approach to the South African solar market. Rather than competing as an installer, Hohm operates as a technology-driven marketplace, connecting homeowners and businesses with vetted, accredited solar installers and embedded financing options through a seamless digital platform. Founded in 2021 by Tim Ohlsen and Emir Gluhbegovic, the Johannesburg-based startup raised over R10.7 million in funding, including what was then the largest seed round for a technology startup in South Africa.

The platform uses proprietary algorithms to assess a property's solar potential, generate tailored proposals, and match clients with suitable installers and finance products, all within a few clicks. In a market where obtaining and comparing quotes has traditionally required days of phone calls and site visits, Hohm's digital-first model represents a genuine leap forward in customer experience. The company's ambition stretches beyond individual installations. It aims to become the infrastructure layer through which millions of South African households access affordable, well-designed solar energy.

5. GoSolr

The upfront cost of a residential solar system, typically between R85,000 and R180,000 for a standard home setup, remains the single biggest barrier to adoption. GoSolr has attacked that problem head-on with a subscription model that eliminates the initial outlay entirely. Founded in 2021 and operating primarily across Johannesburg, Pretoria, Cape Town, and Durban, GoSolr installs a complete solar and battery backup system on your roof, maintains it, monitors it, and insures it. You pay a fixed monthly subscription starting from approximately R1,199 per month for a 3 kW system.

The company owns the equipment for the contract period, typically five years, after which customers can continue at a reduced rate, purchase the system at fair market value, or return it. It is a model borrowed from international solar leasing pioneers and adapted for South African conditions. The appeal is obvious: immediate access to solar power with predictable monthly costs, no maintenance headaches, and no large financial gamble. For renters, homeowners on tight budgets, or anyone uncertain about committing to a full purchase, GoSolr offers a genuinely accessible entry point into solar.

6. GreenHouse Solar

GreenHouse Solar brings more than twelve years of experience to the South African market and has built its reputation around one equipment ecosystem in particular: Victron Energy. As a trusted installer and distributor of Victron products, GreenHouse specialises in designing customised solar and battery power solutions for both homes and businesses, with a focus on transparent system design and detailed client communication.

What clients appreciate most, judging by consistently positive reviews, is the company's follow-through. GreenHouse does not disappear after installation. Their aftercare programme includes system monitoring, maintenance, and responsive support when issues arise. Operating nationwide with particular strength in the Western Cape, GreenHouse is an excellent choice for customers who value reliability, honest advice, and the reassurance of working with a company that has weathered the ups and downs of a volatile industry for over a decade.

7. ARTsolar

In an industry overwhelmingly reliant on imported components, ARTsolar stands apart as South Africa's only fully locally owned solar panel manufacturer. Established in 2010 with a Swiss-designed production facility in Durban's New Germany industrial area, ARTsolar produces high-efficiency photovoltaic modules ranging from 100 Wp to 550 Wp, carrying both local and leading European certifications.

Beyond manufacturing, ARTsolar has expanded into turnkey installation services and nationwide product distribution, with offices in Durban, Johannesburg, and Cape Town. The company was recognised with a Green Economy Manufacturing award, a testament to its dual mission of advancing renewable energy while creating meaningful local employment. For customers who want to support South African manufacturing, benefit from local warranties and guarantees, and access quality equipment without the supply chain uncertainties of imports, ARTsolar offers a compelling proposition that few competitors can match.

8. Sakisa Energy and Technology Group

Sakisa Energy operates at the intersection of commercial solar and industrial energy management, offering engineering, procurement, and construction services tailored to businesses with complex energy needs. Based in Johannesburg with project delivery spanning multiple provinces, Sakisa has earned recognition as one of the leading commercial and industrial solar installers in the Gauteng region.

The company holds SAPVIA certification and works with premium equipment brands, designing systems that optimise self-consumption, integrate battery storage where appropriate, and comply with South Africa's evolving regulatory framework for embedded generation. Sakisa's strength lies in its ability to handle larger, more technically demanding projects where cookie-cutter residential approaches simply do not apply.

9. Wetility

Wetility entered the market with a residential power purchase agreement model that flips the traditional ownership question on its head. Instead of buying or renting a system, Wetility customers pay only for the kilowatt-hours their rooftop system produces, at a rate designed to undercut their municipal electricity tariff. Wetility installs, owns, and maintains the hardware, removing both the upfront cost and the ongoing maintenance burden from the homeowner.

Operating across South Africa's major metropolitan areas, Wetility has grown rapidly by targeting middle-income homeowners who want the savings of solar without the financial commitment or technical complexity of system ownership. The model makes particular sense in municipalities with high electricity tariffs, where the gap between Wetility's per-unit rate and the grid price translates into immediate monthly savings. As the zero-upfront solar sector continues to mature, Wetility's straightforward pricing and professional service have positioned it as one of the segment's most credible players.

10. Dorman Energy Group

Longevity counts for something in an industry plagued by newcomers who arrive with fanfare and disappear within a year or two. Dorman Energy Group has been installing solar systems across Southern Africa since the year 2000, making it one of the longest-serving solar contractors on the continent. That experience covers rooftop installations, ground-mount arrays, carport structures, and full turnkey photovoltaic solutions for commercial and industrial clients.

Dorman's partnerships with major equipment brands and its fully licensed, qualified installation teams ensure compliance with all relevant electrical and structural regulations. For clients who prioritise a contractor with a proven, multi-decade track record over the latest marketing pitch, Dorman offers the kind of quiet competence and institutional knowledge that only comes with time.