Solar & backup power in South Africa: a plain-English guide
Everything you need to understand before you spend on solar — the system types, the rules (SSEG and CoCs), how batteries are sized, and the incentives. Then size your own system and get quotes from vetted installers.
Reviewed on 2026-06-24. General guidance only — rules and incentives change, and every installation needs a qualified, CoC-certified installer. Confirm the current requirements with your municipality, Eskom or SARS.
Grid-tied vs hybrid vs off-grid
A grid-tied system feeds solar into your home while staying connected to the municipal grid — cheapest, but it switches off during load-shedding unless it has a battery. A hybrid system adds a battery and keeps running through outages: the most popular choice for South African homes. An off-grid system disconnects from the grid entirely and must cover all your own usage, which means more panels, more storage and careful load management.
SSEG registration (the part people skip)
Any grid-tied or hybrid system that can push power back — or even just runs in parallel with the grid — generally has to be registered as Small-Scale Embedded Generation (SSEG) with your municipality or Eskom. Registration involves an approved inverter, a compliant installation and paperwork. Skipping it can mean penalties or being ordered to disconnect, so build it into your plan from the start.
Certificate of Compliance (CoC)
Every fixed electrical installation in South Africa needs a valid electrical Certificate of Compliance, issued by a registered person. For solar that means the installation must meet the wiring code and the relevant standards (such as NRS 097 for grid connection). A CoC protects you, satisfies insurers, and is legally required — never accept an install without one.
How batteries are sized
Battery capacity is measured in kWh (how much energy it stores). Modern lithium (LiFePO4) batteries can be discharged deeply and last for thousands of cycles. Size the battery around the load you actually need to carry — just the essentials through load-shedding, or your whole evening usage — rather than the biggest number on a quote. Oversizing storage is one of the most common ways to overpay.
Tax incentives for businesses
South African businesses can claim accelerated depreciation on qualifying renewable-energy assets under section 12B/12BA of the Income Tax Act, which can bring forward a large deduction in the year the system is brought into use. The exact allowance and conditions change, so confirm the current rules with SARS or your tax practitioner before relying on them.
Frequently asked questions
Do I need to register my solar system in South Africa?
If your system is grid-tied or hybrid (it runs in parallel with the municipal grid), you generally must register it as Small-Scale Embedded Generation (SSEG) with your municipality or Eskom, using an approved inverter and a compliant installation. A fully off-grid system that never connects to the grid is treated differently. Confirm the requirements with your local authority.
Will solar keep my power on during load-shedding?
Only if it has a battery. A grid-tied system with no battery shuts down during an outage for safety. A hybrid system with a battery keeps your connected loads running through load-shedding.
Is a Certificate of Compliance (CoC) required for solar?
Yes. Every fixed electrical installation in South Africa requires a valid electrical Certificate of Compliance issued by a registered person, and the solar installation must meet the relevant standards. Always insist on a CoC.
How much does a solar system cost?
Prices vary widely with system size, battery capacity, your roof and the installer, so SunService SA does not quote prices — that would be guesswork. Use the sizer to understand the rough system you need, then get quotes from vetted installers for an accurate figure.
Size your system, then get real quotes
Start with an honest, indicative system size — then let NanoLeap match you with vetted, CoC-certified installers.
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