South Africa’s rooftop solar sector has expanded rapidly — and the compliance framework has tightened alongside it. Every grid-tied system now requires formal SSEG registration with Eskom or the relevant municipality, a NRS 097-2-1:2024-compliant inverter, a Certificate of Compliance from a registered electrical contractor, and network operator approval before connection. Getting one step wrong means a disconnection notice or an insurance claim that won’t pay out.
This guide covers the complete compliance stack: from the national regulatory layer through to the specific requirements of Cape Town, Johannesburg, eThekwini, Ekurhuleni, and Tshwane.
Register Before You Connect
Energising a grid-tied solar system without written SSEG approval from Eskom or your municipality is a breach of your connection agreement. Eskom has increased enforcement since 2025 and will disconnect unregistered systems. Get approval in writing before commissioning.
South Africa’s Solar Compliance Stack
South Africa’s compliance framework operates across four layers. Each layer has different authorities, and installers need to satisfy all four before a system is legally connected.
| Layer | What It Governs | Authority |
|---|---|---|
| National regulatory | SSEG licensing, market rules, generation above 1 MW | NERSA |
| Technical standard | Grid protection, anti-islanding, export limits, metering | NRS 097-2-1:2024 |
| Electrical safety | Wiring, earthing, protection, CoC issuance | SANS 10142-1 + DoL (OHS Act) |
| Network connection | SSEG approval, connection agreement, metering | Eskom or municipality |
Layer 1: NERSA
The National Energy Regulator of South Africa oversees the electricity sector under the Electricity Regulation Act 4 of 2006. For rooftop solar:
- Systems under 1 MW generating for own consumption (with or without export) do not require a NERSA generation licence
- Systems 1 MW and above require NERSA registration under the Small Project IPP framework
- Systems selling power (not just offsetting consumption) may require a trading licence depending on the arrangement
Most residential and small commercial SSEG falls outside NERSA’s direct licensing requirements. NERSA’s role for smaller systems is indirect — it oversees the rules under which Eskom and municipalities operate their SSEG frameworks.
Layer 2: NRS 097-2-1:2024
NRS 097-2-1:2024 is the critical technical standard for any installer working on grid-tied solar in South Africa. Published by the South African Bureau of Standards and adopted by Eskom and major municipalities, it specifies:
- Inverter protection settings (frequency and voltage trip thresholds)
- Anti-islanding requirements
- Power factor and reactive power limits
- Export limitation requirements for networks with constraints
- Metering and data requirements
- Type-testing requirements for inverters
The 2024 revision updated protection trip thresholds and introduced clearer provisions for hybrid systems with battery storage. See the NRS 097-2-1:2024 guide for the full technical breakdown.
Layer 3: SANS 10142-1 and the CoC
Every solar PV installation in South Africa is an electrical installation governed by SANS 10142-1:2020 — the South African wiring code. Key requirements specific to solar:
- DC and AC wiring sizing, protection, and routing
- Earthing and bonding of the PV array, mounting structure, and inverter
- DC isolator and AC isolator requirements
- Labelling and signage
- Surge protection requirements
After installation, the registered electrical contractor issues a Certificate of Compliance confirming the installation meets SANS 10142-1. The CoC is the legal record that the system is safe. See the Certificate of Compliance guide and the SANS 10142-1 guide for full details.
October 2025 change: A DoL-registered electrical contractor can now issue the CoC for residential solar without a separate ECSA PE sign-off. See DoL vs ECSA sign-off explained.
Layer 4: Network Operator (Eskom or Municipality)
The practical compliance milestone most installers focus on is network operator approval — without it, the system cannot be connected. Eskom and the major municipalities each run their own SSEG approval process:
| Network Operator | Approx. Customers | SSEG Portal |
|---|---|---|
| Eskom | ~4.5 million direct customers | selfservice.eskom.co.za |
| City of Cape Town | ~600,000 electricity customers | capetown.gov.za |
| City Power Johannesburg | ~500,000 electricity customers | citypower.co.za |
| Ekurhuleni | ~400,000 electricity customers | ekurhuleni.gov.za |
| eThekwini (Durban) | ~700,000 electricity customers | ethekwini.gov.za |
| City of Tshwane | ~550,000 electricity customers | tshwane.gov.za |
See the individual municipality guides for process details: Cape Town, City Power Johannesburg, Ekurhuleni, eThekwini, Tshwane.
Installer Requirements
A registered electrical contractor under the OHS Act is the minimum qualification to carry out solar PV installation work and issue CoCs in South Africa. Registration is with the Department of Labour under the Electrical Installations Regulations.
For commercial systems above 25 kVA or for systems requiring detailed protection coordination studies, the involvement of a Professional Electrical Engineer (PrEng) registered with ECSA is strongly recommended — and some municipalities require it for larger systems.
What the DoL-registered contractor can do:
- Install the DC and AC wiring
- Commission the inverter
- Conduct the final inspection
- Issue the CoC
When an ECSA PrEng is additionally needed:
- Systems above 25 kVA (some municipalities require a PrEng design sign-off)
- Systems connecting at medium voltage
- Systems with export capacity that requires protection coordination with the network
See the full DoL vs ECSA sign-off guide for the October 2025 regulatory change and its practical implications.
SSEG System Size Limits by Network Operator
Export and connection limits vary between network operators. These are general figures; verify the current limits directly with your network operator before designing a system.
| Network Operator | Residential Single-Phase | Residential Three-Phase | Notes |
|---|---|---|---|
| Eskom | Up to 10 kVA | Up to 25 kVA | Export limitation may apply in constrained areas |
| Cape Town | Up to 10 kW export (residential) | Higher for three-phase | Export limit zone map available on city website |
| City Power JHB | Up to 10 kVA | Up to 25 kVA | Battery systems have additional requirements |
| Ekurhuleni | Up to 10 kVA | Up to 25 kVA | Subject to network capacity |
| eThekwini | Up to 10 kVA | Up to 25 kVA | Variable export limits by feeder |
| Tshwane | Up to 10 kVA | Up to 25 kVA | Pre-approval required for all sizes |
Section 12B Tax Incentive
Section 12B of the Income Tax Act provides an accelerated capital allowance for businesses investing in qualifying renewable energy assets. Under the current provisions:
- 125% first-year deduction for qualifying solar PV generation assets installed in the first year
- Applicable to businesses generating income using the assets
- No upper limit on system size under the business incentive
- Assets must be used directly for electricity generation
For commercial and industrial clients, the Section 12B incentive substantially improves the financial case for solar. SurgePV’s generation and financial tool helps model the Section 12B impact alongside energy savings in South African rand. Use solar design software that supports South African tariff structures for accurate ROI modelling.
Design NRS 097-Compliant Solar Systems for South Africa
SurgePV handles string sizing, protection calculations, and permit documentation for South African projects — Eskom and municipality SSEG submissions included.
Book a Free DemoNo commitment required · 20 minutes · Live project walkthrough
Key South African Standards Summary
| Standard | Scope | Mandatory? |
|---|---|---|
| NRS 097-2-1:2024 | Grid integration, inverter protection, SSEG metering | Yes — required by all network operators |
| SANS 10142-1:2020 | Electrical wiring of premises (DC and AC) | Yes — CoC required under OHS Act |
| SANS 10142-2:2017 | Earthing and bonding of LV systems | Yes — applies to earthing design |
| IEC 62619 / SANS 62619 | Battery energy storage systems (where applicable) | Yes — for hybrid systems with batteries |
| NRS 097-2-3 | Medium voltage SSEG connection (systems above 75 kVA) | For larger systems |
Common Compliance Mistakes in South Africa
| Mistake | Consequence | Fix |
|---|---|---|
| Energising before written SSEG approval | Disconnection, potential fine, void warranty | Always wait for written approval |
| Using inverter not accepted by network operator | Application rejected | Verify inverter acceptance before ordering |
| Incorrect protection settings on inverter | Disconnection, failed inspection | Commission to NRS 097 parameters — not default factory settings |
| CoC issued by unregistered contractor | CoC is legally invalid | Use a DoL-registered electrical contractor |
| No labelling on DC isolators and string combiner | SANS 10142-1 non-compliance, failed inspection | Install all required labels during installation |
| Skipping pre-application notification | Installation not approved | Submit pre-application before any physical installation |
Frequently Asked Questions
Do I need Eskom approval if my municipality supplies my electricity? No. If your electricity is supplied by a municipality, your SSEG application goes to the municipality — not Eskom. Eskom is only the relevant network operator for customers on direct Eskom supply (typically rural, peri-urban, and some commercial premises supplied directly from Eskom’s distribution network).
Can I install solar and not export to the grid in South Africa? Yes. A non-export or zero-export configuration is technically simpler — it eliminates some of the grid interaction requirements of NRS 097 and removes the need for a bidirectional meter. Many installers use zero-export limiters or inverters with built-in zero-export functionality to avoid the full SSEG registration process. However, the CoC and wiring compliance requirements under SANS 10142-1 still apply to non-exporting systems.
How long does Eskom SSEG approval take? Eskom’s stated target is to process complete residential SSEG applications within 21 working days. In practice, processing times vary by region and application volume. Applications with missing documents or non-compliant inverter models take significantly longer. Submitting a complete application package reduces processing time.
Is battery storage subject to separate compliance in South Africa? Yes. Battery energy storage systems (BESS) must comply with IEC 62619 (safety requirements for lithium batteries), SANS 10142-1 (wiring), and the hybrid system provisions of NRS 097-2-1:2024. Some municipalities have additional requirements for battery systems, including ventilation specifications and fire separation distances. See the battery storage compliance guide for full details.
What happens to existing solar systems that are not registered? Eskom and municipalities have increased enforcement since 2025. Unregistered systems identified through billing anomalies or meter inspections may receive a disconnection notice. The owner is required to either register the system (if it meets current NRS 097 requirements) or disconnect it. Registering an already-installed system requires a post-installation SSEG application with full documentation.
