Commercial / SSEG
How do I register commercial rooftop solar (SSEG) in South Africa?
Commercial SSEG follows the same safety spine as home systems — NRS 097-compliant inverters, a CoC, and distributor approval — but capacity, metering and NERSA thresholds scale up. Stay under the distributor’s embedded-generation process where you can; above 100 kW you generally enter a NERSA licensing / registration path. Start with a load study and the metro or Eskom commercial desk, not with panels on the roof.
Updated 27 October 2026 · Illustrative ranges — not a formal quote, tax ruling or legal advice.
Answer first: Treat commercial solar as a grid-connection project with a generation schedule attached. The electrical design, protection settings and SSEG application must match the site’s notified maximum demand, tariff and export intent. Skipping registration to “just zero-export” still usually needs a discussion with the distributor — grey systems create insurance and sale-of-building problems.
Home SSEG vs commercial SSEG
| Topic | Typical home | Typical commercial |
|---|---|---|
| Capacity | Often ≤10–20 kVA inverter class | Tens to hundreds of kW; carports and factories |
| Tariff | Residential / Homeflex | Commercial TOU, Megaflex-style, or municipal business |
| Export credits | Published residential FIT / Gen-offset | Commercial FIT schedules (e.g. Cape Town non-res FIT1/FIT2 in Annexure 6) or negotiated |
| NERSA | Usually distributor registration ≤100 kW | Same 100 kW hinge — confirm current NERSA embedded-generation rules for your size |
| Stakeholders | Homeowner | Landlord, facilities, insurer, fire consultant, board |
Home walkthrough: municipal SSEG steps. Size context: max kW / SSEG.
Step sequence that usually works
- Bills + NMD + single-line diagram. Pull 12 months of demand data. Note the tariff code and whether you are Eskom-direct or municipal.
- Pre-application meeting with the distributor’s embedded-generation / SSEG desk for commercial sites. Ask for the application form, fee schedule, protection requirements and export policy.
- Design pack: NRS 097-2-1 listed inverters, earthing, anti-islanding, AC/DC protection, and — if exporting — the meter change path. Prefer inverters on the current NRS / distributor list — NRS inverters.
- Submit SSEG / EG application before energising. Parallel operation without approval is how projects get stuck at CoC or insurance.
- Install with a registered contractor; commission; issue CoC and as-builts.
- Metering and tariff migration if export or TOU is required. Commercial FIT rates differ from residential — use the metro’s commercial generation schedule.
- If aggregate generation crosses NERSA’s threshold (commonly discussed at 100 kW for distributor vs NERSA paths), budget time for the NERSA process. Confirm the live threshold and category on NERSA’s embedded-generation pages — do not rely on a WhatsApp summary.
Export vs zero-export commercial
Zero-export (self-consumption only) still needs compliant inverters and usually a formal notification or application — distributors want protection settings that will not back-feed under fault. Exporting can unlock credits but adds metering cost and exposes you to commercial FIT levels that may be lower than avoided retail energy. Model self-use first; treat export as residual. Cape Town’s 2026/27 Annexure 6 publishes separate non-residential feed-in figures (FIT1/FIT2 excl. VAT) — read the annexure for your customer class.
Landlord, parkade and multi-tenant sites
Who owns the roof, who holds the electricity account, and who will be named on the SSEG registration must be written down. A tenant-funded system on a landlord account is a contract problem before it is an electrical one. Fire plans and insurer notifications belong in the same pack as the CoC — battery fire safety.
Pairing with fleet EV charging
If the same erf will charge vans, design PV → load / charger soak before export, and coordinate NMD between HVAC, process loads and EVSE. See fleet charging and commercial BESS.
Documents the commercial desk usually wants
- Company / entity details and site erf address
- Latest electricity account and NMD / breaker info
- Single-line diagram and protection settings sheet
- Inverter datasheets with NRS 097-2-1 evidence
- Professional engineer sign-off where the distributor’s size threshold requires it
- Landlord consent if you do not own the building
- Fire and insurance acknowledgements when BESS is included
Keep as-builts and serial numbers with the CoC. When the building is sold or refinanced, that pack is worth more than another marketing brochure.
Fees, timelines and common stalls
Application fees, meter changes and witness testing vary by metro and by Eskom region. The stalls we see repeatedly: incomplete forms, inverters not on the accepted list, export applied for on a tariff that does not allow it, and tenants applying on landlord accounts without consent. Build 4–12 weeks of admin buffer into the project plan for mid-size rooftops; larger sites need more. Parallel long-lead hardware only after the distributor confirms the connection path in writing.
How this links to fleet EV and BESS
A warehouse that adds 200 kW of PV and twenty AC chargers is one electrical story. Share the load study across PV, HVAC and EVSE so you do not spend twice on NMD. Commercial BESS that shaves peaks can improve the EV business case more than another DC pile — commercial BESS · fleet charging.
Eskom-direct commercial vs metro commercial
Factories on Eskom Megaflex-style tariffs speak to Eskom’s embedded-generation process; shops on City Power or Cape Town commercial tariffs speak to the metro desk. Forms, fees and export credits differ. Bring the tariff code from the bill to the first meeting. Residential feed-in tables on this site (108–185 c/kWh incl. VAT band for 2026/27) are not your commercial FIT — read the commercial annexure for your distributor.
Commercial vs residential filing differences
Shops and light industrial sites often need single-line diagrams stamped by a competent person, protection settings aligned to the distributor, and clarity on whether export is allowed or zero-export is mandated. Demand charges and NMD dominate the business case more than residential export cents — demand charges · small business solar · commercial BESS.
Phased BESS note
Many SA facilities add PV first for daytime kWh, then BESS for peak shaving and Stage resilience. File SSEG for the generation you will actually energise; “future battery” marketing on day one still needs a protection story.
Quick questions
Do I need NERSA approval for a 50 kW rooftop?
Often the distributor’s embedded-generation / SSEG process covers sub-100 kW systems — confirm with your metro or Eskom desk and current NERSA guidance. Do not assume.
Can I install first and register later?
Risky. Energising without approval can block CoC, insurance and resale. Apply first.
Is commercial feed-in the same as residential?
No. Metros publish separate commercial / non-residential generation tariffs. Use your customer class schedule.
What a complete commercial pack usually includes
Municipal desks reject incomplete packs more often than they reject oversized designs. A clean commercial SSEG file typically carries: single-line diagrams for PV, battery (if any) and EV load; NRS 097-2-1 type-test certificates for every inverter model; a CoC path named for the registered person; protection settings (anti-islanding, export limit if required); and a load schedule that shows daytime self-consumption versus export. Large sites should also show whether they stay under the metro’s simplified threshold or need a full grid-impact study. Ask the installer to number annexures the same way the metro checklist does — clerks re-use those numbers when they chase missing pages.
Savings angle: every week of rework is a week of full grid bills. A R2 000–R5 000 engineering tidy-up that clears first-pass review often pays for itself in avoided peak demand and delayed export credits. Confirm whether your tariff class after approval still carries a high network access charge; commercial export credits only help if daytime self-use is already high.
Sources
- City of Cape Town Budget 2026/27 Annexure 6 — consumption and generation tariffs
- NERSA — embedded generation / licensing information (confirm live thresholds)
- NRS 097-2-1 inverter compliance context