1. Self-consumption
Every kWh you generate and use yourself displaces retail electricity at your municipal/Eskom rate. This is usually the strongest rand return.
Money matters
Solar costs & savings in South Africa
Ranges below are illustrative teaching tools — not quotes. Your roof, municipality, tariff, self-consumption and equipment choice change the outcome.
Worked on real rates: solar payback on 2026/27 Cape Town tariffs · 2026 tariffs by metro · is a battery worth it?
What drives the price of a system?
- Inverter size (kW) and type (hybrid vs string)
- Battery usable capacity (kWh) — often the largest single line item
- Panel wattage and count (array size)
- Mounting complexity, cabling, DB upgrades, three-phase
- Compliance: CoC, metering, SSEG application support
Illustrative installed bands often discussed in the SA market for 2025–2026-style family hybrid kits can span roughly mid-five-figures to low-six-figures in rand depending on size — always get written quotes for your site.
Where savings come from
2. Avoided load-shedding losses
Harder to price, but real: spoiled food, lost work hours, generator fuel, UPS replacements.
3. Export / net-billing credits
Where your distributor allows export, credits are often based on avoided cost methodologies under NERSA-related net-billing frameworks — typically less valuable than self-use. Confirm your metro’s schedule.
4. Tariff structure
Inclining block, time-of-use, and fixed charges all matter. A fixed charge does not disappear when you go solar.
Illustrative payback framing
| Scenario (illustrative) | Focus | Payback story |
|---|---|---|
| Daytime-heavy home, good roof | Self-consumption | Often faster — solar offsets expensive daytime kWh |
| Backup-first home | Battery heavy | Longer pure “bill payback”; value includes resilience |
| Business with weekday loads | Daytime offset | Can be strong if loads align with sun |
Assume electricity price inflation carefully; installers sometimes use optimistic assumptions. Ask them to show the self-consumption ratio and tariff used.
SSEG & municipal notes (high level)
NERSA publishes municipal tariff decisions and has set net-billing related rules. For 2026/27 residential export credits (≈ incl. VAT): Cape Town ~152.93 c/kWh, City Power 143.29 c, eThekwini ~184.60 c, Tshwane ~108.25 c (NERSA — confirm with City). Full table and caveats: feed-in by metro. Requirements often include approved inverters, bi-directional meters, and registration before export.
This page is educational. It is not legal, tax, or municipal advice. Verify current tariffs and application steps with your distributor and a registered installer.
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