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How much does a 5 kW solar system cost in South Africa in 2026?

By Kagiso Mahlangu, The Bill Detective · 26 October 2026 · 8 min read

Short answer, as of 26 October 2026: a fully installed 5 kW system in South Africa costs roughly R65,000 to R100,000 without a battery, about R110,000 with a 5 kWh battery, and R135,000 to R185,000 with a 10 kWh battery. That spread is real, not lazy research. The battery is the swing factor, and quotes that look cheap often leave things out.

Below is where those numbers come from, what each part of the system costs, and the Tshwane charges that almost never appear on an installer's quote but very much appear on your municipal account.

The 2026 price ranges, side by side

We pulled the most recent published ranges we could find. None of these come from us; they're from installers, marketplaces and calculators that published 2026 figures.

One outlier worth knowing about: Energy Bee advertises its own 5 kW kit with a 10 kWh battery at R74,500 to R90,500 installed. That's well below the other 10 kWh ranges above. It may be a genuinely sharp price, but a number that much lower is exactly when you should ask, line by line, which panels, which inverter, which battery and what warranty you're getting.

The detective's rule: never compare two totals. Compare two itemised quotes.

What "5 kW" actually means on a quote

Here's the first trap. "5 kW" usually describes the inverter, the box that turns the panels' DC power into the AC power your house uses. It doesn't automatically tell you how many panels you're getting, or how big the battery is.

• Panels: 5 kW of panels at 550 W each is about nine panels. Many installers put a little more panel capacity than inverter capacity on the roof, so you'll see 10 to 12 panels on some 5 kW quotes.
• Inverter: a 5 kW hybrid inverter can run panels, a battery and the grid together. A grid-tied inverter is cheaper but switches off when the grid goes down.
• Battery: usually quoted in kWh of storage. A 5 kWh and a 10 kWh battery are very different price points.

So when two installers both say "5 kW system", ask each one: how many watts of panels, which inverter model, and how many usable kWh of battery?

Where the money goes

SolarMatch's August 2026 guide breaks a typical hybrid quote into these installed costs:

Source: SolarMatch, 14 August 2026.

Two things jump out:

1. The battery dominates. SolarMatch says batteries are often 35 to 45% of a hybrid quote. At R11,000 to R18,000 per usable kWh, the difference between a 5 kWh and a 10 kWh battery alone can be R55,000 or more.
2. Panels are now the cheap bit. At R1,200 to R2,400 each, an extra two panels costs less than an extra hour of battery. If your goal is cutting the bill rather than surviving outages, more panels and a smaller battery is often the better buy.

The Tshwane costs that don't show up on the installer's quote

If you live in Pretoria, Centurion or anywhere else on City of Tshwane electricity, and your system stays connected to the municipal supply, the City's 2026/27 tariff adds costs of its own. These come from the City's approved tariff (Gauteng Provincial Gazette No. 186 of 17 June 2026, as summarised by Podium Energy) and NERSA's reasons for decision on Tshwane's 2026/27 tariffs:

• Registration. A solar system connected to the municipal supply must be registered with the City.
• A two-way meter: R2,820.31 excluding VAT for single phase (about R3,243 including VAT), or R4,474.89 excluding VAT for three phase (about R5,146 including VAT).
• A fixed monthly charge of R324.00 excluding VAT (R372.60 including VAT) per metering point for a registered solar home, whether or not you buy any units from the City. That's R4,471 a year.
• Export credit: power you send back to the grid is credited at 94.13c a unit excluding VAT. The City charges you between 324.12c and 445.51c a unit (excluding VAT) for the power you buy, so exporting is worth far less than using your own power.

Ask every installer whether their quote includes the City's paperwork and the meter, and whether they've factored the monthly charge into any savings figure they show you. Many don't.

An example: what a 5 kW system might save a Pretoria home

This is an illustration with stated assumptions, not a real household or a promise.

Take a Tshwane home using 900 kWh a month. On the City's 2026/27 domestic tariff (324.12c to 445.51c per kWh excluding VAT, no fixed charge on the ordinary domestic tariff), that's about R4,150 a month including VAT.

Now assume a 5 kW hybrid system with a battery covers 400 kWh a month of that usage. Because Tshwane's tariff is stepped, the units you stop buying come off the most expensive steps first:

• New grid usage: 500 kWh, which costs about R2,157 a month including VAT.
• Electricity saving: about R1,994 a month.
• Less the City's fixed charge for a registered solar home: R372.60 a month.
• Net saving: about R1,621 a month, or roughly R19,450 a year.

Simple payback at that saving, before tariff increases:

The fixed charge adds more than a year to payback in this example. Tariffs rising each year would shorten these paybacks, because each saved unit is worth more. Battery replacement, maintenance and finance costs would lengthen them. Also, 400 kWh a month is an assumption. How much a system really saves depends on how much of your use happens while the sun is up, and how much the battery can shift into the evening.

For context, GridPulse's PVGIS-based estimate is about 1,736 kWh a year per kW of panels in Tshwane, after allowing for roofs that aren't ideal. Five kW of panels would therefore make about 8,700 kWh a year, roughly 720 kWh a month on average. A household only gets the full value of that if it actually uses the power rather than exporting it at 94.13c.

What pushes a quote up or down

From the published guides above, these are the common reasons two quotes for "5 kW" differ:

• Battery size and brand. The biggest single factor.
• Roof type. Tile and slate roofs, and double-storey homes, take longer and need different mounting.
• Distance to the DB board. Long cable runs add cost.
• Three-phase supply. Needs a different inverter setup and, in Tshwane, a dearer two-way meter.
• Whether compliance is included. The Certificate of Compliance and commissioning cost R3,500 to R9,000 on SolarMatch's figures. A quote without them isn't finished.
• Brand tier. Hybrid inverters alone range from R18,000 to R60,000.

Grid-tied, hybrid or off-grid?

• Grid-tied (no battery). Cheapest. Saves on daytime usage only and switches off when the grid is down. Best for bill-cutting in homes where someone is around in the day.
• Hybrid (with battery). The common South African choice. Saves on the bill and keeps essentials running during outages.
• Off-grid. The Gauteng price guide we cite puts 5 kW off-grid at R150,000 to R250,000. In Tshwane, a home that has left the municipal supply doesn't pay the solar fixed charge or need the two-way meter, but it needs enough battery (and often a generator) to cover winter and cloudy spells.

How to get a quote you can actually compare

1. Gather 12 months of usage from your municipal account or prepaid history, in kWh, not rands.
2. Decide your goal. Lower bill, outage backup, or both. It changes the right battery size.
3. Get at least three written, itemised quotes listing panel wattage and count, inverter model, usable battery kWh, mounting, compliance, warranties and who handles City registration.
4. Check the installer. Ask for their electrician's registration details and proof of previous Tshwane-registered installations.
5. Do your own payback sum using the method above, including the City's fixed charge if you'll stay grid-connected.

Sources

All checked on 26 October 2026.

• Energy Bee, 5 kW solar system price guide, updated 13 October 2026.
• SolarMatch, Solar panel cost in South Africa: 2026 price guide, updated 14 August 2026.
• OurPower, Should I go solar? decision tool, early-2026 estimates.
• Handyman Johannesburg, 5 kW installation prices in Johannesburg and Pretoria.
• City of Tshwane, 2026/27 tariff increases.
• NERSA, Reasons for decision: City of Tshwane tariffs 2026/27.
• Podium Energy, Tshwane electricity rates 2026/27, summarising the Gauteng Provincial Gazette No. 186 of 17 June 2026.
• GridPulse, How long rooftop solar takes to pay for itself, by municipality.

Next, read Is solar still worth it now that load shedding has eased?, which runs the numbers on payback, fixed charges and when solar doesn't make sense.

Kagiso Mahlangu is the pen name of The Bill Detective's editorial team. Figures come from the published sources linked above and were checked on the date shown; tariffs and prices change, so confirm with your municipality and get written quotes. Example scenarios are illustrations, not real customers. If you ask for quotes through this site we may be paid a referral fee by the installer, at no cost to you.