☀️ Peak sun hours in South Africa
South Africa gets excellent sun — roughly 5 to 6.5 peak sun hours. The interior and Northern Cape are highest; the coastal cities a little lower.
| Region | Approx. peak sun hours (annual avg) |
|---|---|
| Northern Cape & interior | ~6.0 – 6.5 |
| Free State & Gauteng | ~5.3 – 5.8 |
| Eastern & Western interior | ~5.0 – 5.6 |
| Durban & KwaZulu-Natal coast | ~4.8 – 5.3 |
| Cape Town & southern coast | ~4.5 – 5.3 |
Use your local figure in the solar panel calculator and the energy production calculator. Background: peak sun hours by location.
⚡ Electricity prices in South Africa
Eskom residential tariffs have risen steeply and are now roughly R2.50–R4.00 per kWh depending on your municipality and tariff plan. Combined with load-shedding, that rising price is the main reason rooftop solar has taken off — every self-generated kWh avoids both the cost and the blackout.
💸 Incentives & net metering
Support has varied: a temporary rooftop rebate for individuals ran in 2023–2024, and businesses can use Section 12B allowances. Net metering / feed-in depends on your municipality (for example, the City of Cape Town has a feed-in scheme) — many still cap or restrict residential export, so most homes size for self-consumption plus a battery for backup. Confirm your municipality's current rules.
💰 System cost & payback in South Africa
Prices vary with whether you add a battery (very common here for load-shedding). As a rough guide:
| System size | Approx. cost | Suits |
|---|---|---|
| 3–5 kW (grid-tied, no battery) | ~R60,000 – 110,000 | Bill savings, daytime use |
| 5 kW + battery | ~R110,000 – 180,000 | Backup through load-shedding |
| 8–10 kW + battery | ~R180,000 – 300,000+ | Larger home / full backup |
Work out your own numbers with the ROI calculator and the bill savings calculator, or design the whole system with the system report builder.
💡 Local insight: South Africa
In South Africa the maths is different from most countries: because of load-shedding, many people buy solar-plus-battery for reliability first and savings second. If your main goal is backup, size the battery for your essential loads during typical blackout windows; if it's pure savings, a grid-tied system sized for daytime self-consumption pays back fastest as Eskom prices keep rising.
🧰 Solar tools
Plan your system with these:
- Solar panel calculator — how many panels for your usage and sun hours.
- Solar bill savings calculator — how much you'll save.
- ROI calculator — payback period.
- Battery calculator — if you want backup.
- Full system report — design the whole system in one page.
Related reading: how long do solar batteries last, grid-tied vs off-grid vs hybrid, and how many panels to run a house.
❓ Frequently asked questions
How many peak sun hours does South Africa get?
About 5 to 6.5. The Northern Cape and interior are highest (~6–6.5), while coastal Cape Town and Durban are around 4.5–5.3.
Is solar worth it in South Africa?
For most homes yes — rising Eskom tariffs plus load-shedding make solar attractive both for savings and for keeping power during blackouts. Payback is commonly around 5–8 years for grid-tied systems.
Does solar help with load-shedding?
Only if you add a battery (or a hybrid inverter with backup). A grid-tied-only system shuts down during a blackout for safety; a battery system keeps your essential loads running.
How much does solar cost in South Africa?
A grid-tied 3–5 kW system is roughly R60,000–110,000; adding a battery for load-shedding backup pushes a 5 kW system to about R110,000–180,000. Get local quotes.
Note: Eskom tariffs, municipal net-metering rules and prices in South Africa change frequently. These figures are approximate, for planning only — verify with your municipality and a local installer.