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What solar actually costs in South Africa

Installed prices, broken down by component so you can see where the money goes, and what each system size returns. The single most useful thing you can do before collecting quotes is to know which line item is doing the damage, because the difference between a R120,000 and a R170,000 quote for the same system size is almost never the panels.

Where the money goes in a quote

Shares below are of the installed price of a typical residential hybrid system. Percentages shift with configuration: on a grid-tied system with no battery, the inverter and panels take the share the battery would have.

ComponentShareTypical priceWhat decides it
Battery30-45%R6,000 - R9,000 per usable kWhThe largest line on any hybrid quote, and the one with the widest quality spread. Compare warranted cycles at a stated depth of discharge, not headline kWh.
Inverter15-25%R12,000 - R65,000Sized on peak simultaneous load, not on daily consumption. Hybrid units cost more than grid-tied ones because they contain the transfer and charging electronics.
Panels12-20%R2,000 - R4,800 per panelThe cheapest major component per rand of output, and the one people over-research. Tier-1 panels differ from each other far less than batteries do.
Mounting and racking5-10%R800 - R2,000 per panelRoof type drives this. Tile and slate cost more than IBR sheeting, and coastal installations need marine-grade fixings that inland ones do not.
Electrical, cabling and protection8-15%R8,000 - R25,000DC isolators, surge protection, a changeover or essential-loads distribution board, and the cable runs. This is the line cheap quotes cut, and it is the line that causes fires.
Labour and commissioning10-15%R10,000 - R30,000Includes configuring the inverter properly, which is skilled work. A correctly commissioned system and a badly commissioned one can differ by 15% in delivered output on identical hardware.
Certificate of Compliance and registration2-5%R1,500 - R6,000Legally required for the electrical work, plus municipal or Eskom embedded generation registration for anything grid-tied. Frequently omitted from the cheapest quote and then billed later, or simply skipped.

System sizes, installed cost and what they return

Worked on Gauteng irradiance (5.5 kWh/m²/day annual, 4.4 in June) as a national midpoint. Your own province will move these figures by roughly 15% either way, which is why every city page on this site runs the same sums on local numbers.

3 kW grid-tied, no battery

R55 000 - R80 000 installed

Cutting a daytime-heavy bill. Gives you nothing during an outage.

Generates
4 698 kWh a year
Saves monthly
R662 - R967
Simple payback
4.7 - 10.1 years

5 kW hybrid with 5 kWh battery

R110 000 - R160 000 installed

Lights, plugs, WiFi, TV and a fridge through a typical outage.

Generates
7 829 kWh a year
Saves monthly
R1 561 - R2 281
Simple payback
4.0 - 8.5 years

8 kW hybrid with 10 kWh battery

R170 000 - R240 000 installed

A family home keeping most circuits live, geyser excluded.

Generates
12 527 kWh a year
Saves monthly
R2 497 - R3 649
Simple payback
3.9 - 8.0 years

10 kW hybrid with 15 kWh battery

R220 000 - R320 000 installed

Whole-home backup including heavy loads, or a small business.

Generates
15 659 kWh a year
Saves monthly
R3 121 - R4 562
Simple payback
4.0 - 8.5 years

Savings assume you consume 65% of generation on a system without a battery and 92% with one, valued at R2.60 to R3.80 per unit. Payback is simple payback with no allowance for electricity price increases, finance costs, maintenance or inverter replacement. It is deliberately the pessimistic case.

Work it out on your own numbers

Take your last electricity bill, divide the total rand by the units consumed, and you have the only tariff figure that matters for your payback. Then size the system against your actual consumption rather than a system size someone quoted you.

Size a system from your usageLocal costs and payback for your town

Solar costs: what buyers ask

Almost always the battery and the electrical work. Two 5 kW systems with 5 kWh of storage can differ by R50,000 because one uses a battery warranted for 6,000 cycles at 90% depth of discharge and the other one warranted for 3,000 at 80%, which is half the delivered energy over its life for two-thirds of the price. The second common gap is protection and compliance: surge protection, DC isolators, an essential-loads board and a Certificate of Compliance add real cost, and a quote that leaves them out looks competitive right up until an inspection or an insurance claim. Compare the six specification lines, not the totals.
For a household paying between R2.60 and R3.80 per unit and consuming most of its electricity in daylight, yes, on a five to nine year simple payback for a hybrid system and faster for panels alone. That arithmetic gets better every year electricity prices rise, and it gets worse if you finance the system at a high rate or if your consumption is concentrated at night with no battery. The honest caveat is that payback is not the only reason people buy: a large share of South African installations are bought for continuity through outages, and that value does not show up in a payback calculation at all.
Compare the finance rate against the effective return. A system paying back in seven years is earning roughly 14% a year against your electricity bill, so debt cheaper than that is accretive and debt more expensive than that is not. Home loan extensions are usually the cheapest option and unsecured solar finance the most expensive. Whatever the structure, insist on knowing the total repaid rather than the monthly instalment, because instalments are easy to make attractive by extending the term past the point where the system has paid for itself.
Three. Cleaning, which matters more in dusty and industrial areas than most owners expect and can cost several percent of annual output if neglected. Servicing, which is a modest annual or biennial cost and mainly buys you early detection of loose connectors and corroding hardware. And inverter replacement, which typically falls somewhere around year 10 to 15 and is the single largest post-installation cost. Batteries are usually warranted for 10 years and will need replacing eventually too. A payback calculation that ignores all three is optimistic, which is why ours states that it does.
No. Past a point you are limited by the inverter, by roof space with usable orientation, and by how much you can actually consume. Extra generation you export earns little or nothing from most municipalities, so panels beyond your self-consumption plus battery capacity are close to dead capital. The exception is deliberate winter oversizing: adding capacity specifically so the array still meets your needs in June, accepting that it will overproduce in December. That is a legitimate design choice, but it should be a stated one rather than an accident.