GSI delivers end-to-end solar solutions, from system design and engineering to installation, commissioning, and long-term support. Choose from residential solar, commercial and industrial systems, off-grid solutions, and solar hot water, built for reliability, performance, and real savings.
Custom residential solar solutions designed to lower electricity bills, improve energy reliability, and add long-term value.
This Solar Solution Is Right for You If You Want To:
Lower your monthly electricity bills
Keep your home or business powered during outages
Gain greater energy independence from the grid
Scalable commercial solar solutions for businesses and industry, —designed to reduce operating costs, improve reliability, and integrate batteries or gensets where needed.
This Solar Solution Is Ideal for Businesses That Want To:
Reduce operating and electricity costs
Ensure reliable power for uninterrupted operations
Meet sustainability and ESG energy goals
Thermodynamic hot water solutions in 200L–300L models, which assist with efficiently heating water.
This Hot Water Solution Is Right for You If You Want To:
Reduce the energy cost of heating water
Enjoy a consistent, reliable hot water supply
Decrease dependence on grid electricity
From design to installation and long-term performance, our solutions are tailored, tested, and trusted.
Over 1880+ residential and business solar installations across South Africa and Mauritius.
Powering the future with 26+ MW of solar, expanding access for businesses and homes.
With 7+ years of expertise, we power businesses and homes with reliable clean energy.
We have proudly installed high-performance solar solutions for 250+ happy clients.
At GSI, we support the shift to low-impact, energy-smart buildings through integrated solar technologies, thermodynamic hot water systems, and efficient, future-ready designs. Our solutions reduce environmental impact while delivering lasting savings and performance.
We prioritise environmentally responsible products and components that minimise waste and maximise system lifespan.
Our solar and water heating systems are engineered to reduce energy demand while supporting modern green building goals.
Rising energy costs and unreliable power supply are pushing homeowners and businesses to look for smarter, more reliable alternatives. Solar solutions offer a practical way to reduce costs while gaining greater control over energy supply.
More people are switching to solar solutions because they help to:
For many property owners, solar is no longer just an environmental choice, it has become a smart financial and operational decision.
We evaluate your property and energy usage to recommend the most suitable solar solution for your needs and budget.
Our engineers design your system, finalise technical details, and obtain any required approvals before installation begins.
Our installation team sets up panels, inverters, and batteries efficiently, typically completed within 2–10 days, depending on system size.
The system is thoroughly tested, configured, and connected to ensure safe and optimal performance from day one.
After installation, we provide monitoring, maintenance, and technical support to keep your solar system running reliably long term.
A solar system will only provide power during outages if it includes battery storage or a hybrid inverter setup. Grid-tied systems without batteries automatically switch off during outages for safety reasons. If backup power is important, a battery-enabled solar energy installation is recommended.
Savings depend on your energy usage, system size, and tariff structure, but many homes and businesses reduce their electricity bills significantly after installing solar. In commercial cases, systems are often designed so that monthly savings offset a large portion of the financing cost.
Most residential solar energy installations take 1-3 days, while larger commercial systems can take several days to a few weeks, depending on system size, approvals, and site complexity. Your installer should provide a clear timeline after the site assessment and system design are complete.
A solar system will only provide power during outages if it includes battery storage or a hybrid inverter setup. Grid-tied systems without batteries automatically switch off during outages for safety reasons.
Most solar panel systems are built for long-term performance. Quality panels typically last 25+ years, often continuing to produce power beyond that at slightly reduced output.
The average payback period for a solar installation is typically around 5 to 7 years, depending on system size, energy usage, electricity tariff increases, and whether financing is used.
Savings depend on your energy usage, system size, and tariff structure, but many homes and businesses reduce their electricity bills significantly after installing solar.
