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Everyday LifeSolar and Backup Power in South Africa: What Drives the Cost in 2026
What backup power costs depends mainly on the size of the battery, the size of the inverter and whether you add solar panels. For a fridge, lights and Wi-Fi, a 3 to 3.5kVA inverter with a 5kWh lithium battery is typically enough. We don't print rand prices because quotes for the same specification vary too much, so get at least three written quotes, and for anything wired into your distribution board make sure an electrician's Certificate of Compliance is included.
Solar and backup power in South Africa is no longer the panic-buy it was during the worst load shedding years, but most households still want some kind of backup, and the sheer range of systems on offer, from plug-in kits to full solar-and-battery installs, makes it hard to know what you actually need. Here's what drives the cost at each tier in 2026, how to size a system, how to compare quotes, and what the sales pitch usually leaves out.
Do you still need backup power in 2026?
As of 9 October 2026, Eskom reports 511 consecutive days without load shedding, counted from 16 May 2025. Eskom also reports that the sixth and final Kusile unit entered commercial operation in September 2025 and that average unplanned outages have fallen from 16,345MW to 9,064MW over the past three years. Our load shedding guide covers that turnaround in more detail, and our cost of living in South Africa guide shows where backup power sits in a monthly household budget.
But "no national load shedding" isn't the same as "power never goes out." Load reduction on individual feeders, ageing local cabling, cable theft, and storm-related faults still cause unscheduled outages in specific suburbs. Eskom says what remains of its load reduction is confined to selected areas in Gauteng and KwaZulu-Natal, with a target of ending it by March 2027, and that illegal connections and meter tampering are still damaging networks in some areas.
Many households now buy something smaller and cheaper than they would have in 2023, purely as insurance for the unplanned stuff, rather than a full off-grid setup built for daily stage 6.
If you are renting, ask the landlord or managing agent whether the building already has backup power before you pay for any of your own. Our renting guide lists the backup power questions to ask before you sign a lease.
The three tiers of backup power
Everything on the market sits roughly into three tiers, and it helps to decide which one you actually need before a salesperson decides for you.
| Tier | What it is | What mainly drives the cost |
|---|---|---|
| Plug-in kit | A small portable battery/inverter that plugs into a wall socket; powers a few lights, a router and device charging. No electrician needed. | Battery capacity and inverter output; no electrician or installation bill if it simply plugs in |
| Inverter + battery (no solar) | A hybrid or backup inverter wired into your DB board with a lithium battery; runs the fridge, lights, router, TV and a laptop through most outages. Charges from the grid only. | Battery size (5kWh vs 10kWh and up), inverter rating, and the electrician's installation and COC |
| Full solar + battery system | Rooftop panels plus a hybrid inverter and battery; charges for free during the day and can run the house, or most of it, indefinitely if sized generously. | Number of panels, battery and inverter size, roof type and how complex the installation is |
Prices vary a lot between installers for what sounds like the same system, and they move with exchange rates and battery pricing, so we don't print rand figures here. Instead, get at least three written quotes for the same specification from installers registered with a recognised body (PV GreenCard or SAPVIA-affiliated), and compare them line by line: inverter rating, battery capacity and warranty, number of panels, and whether the COC and any municipal authorisation are included.
What size do you actually need?
Two separate numbers matter, and installers sometimes blur them: the inverter's kVA rating is how much power you can draw at once, and the battery's kWh capacity is how long you can draw it for.
An "essentials only" load, fridge, some LED lighting, a Wi-Fi router and laptop charging, draws well under 1kW continuously, though a fridge compressor can surge to around 1,800W when it kicks in. A 3 to 3.5kVA inverter handles that comfortably, and a 5kWh lithium battery typically gives several hours of runtime on that load, enough for most outages.
Add a TV, microwave, kettle and a few more lights and you'll want to move up to a 5kVA inverter. Add air conditioning, a pool pump or an electric geyser and you're into 8kVA-plus territory, or you accept those specific circuits stay on mains-only and aren't backed up: a sensible compromise a lot of households make to keep the system size, and cost, down.
Generator vs battery: the real trade-off
A generator is usually the cheapest way to get real power on tap, at least upfront, since a basic fixed unit costs a fraction of a comparable battery system. But it comes with running costs a battery doesn't: fuel, regular maintenance, and the fact that it has to run outdoors with proper ventilation, which rules it out for anyone in a flat or a home without safe outdoor space.
It also can't switch over instantly, so anything that needs continuous power, a desktop PC mid-task, some medical equipment, will still drop for the few seconds it takes to start and connect.
A battery-based inverter system costs more upfront but switches over seamlessly, runs silently indoors, and, if it's charged by solar panels rather than the grid, costs close to nothing to run once the system has paid for itself. For a lot of households the better fit is a small inverter-and-battery setup for everyday resilience, with a generator only if they have off-grid land or long outages to plan for.
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Installation, the COC, and what quotes leave out
Any system wired into your home's fixed distribution board, not just plugged into a wall, legally needs a Certificate of Compliance (COC) from a registered electrician once it's installed. This isn't paperwork you can skip to save money: uncertified electrical work is an insurance risk, because an insurer may decline a claim, including a fire claim, that traces back to non-compliant solar or inverter work.
Municipalities add their own rules on top. In Cape Town, every new solar and/or battery installation is treated as grid-tied: it has to use a City-approved inverter and be authorised by the City before it is switched on, even if you never plan to feed power back. The City can issue a contravention notice for an unauthorised system and says failure to comply could lead to disconnection of your supply. It also no longer accepts applications for standby or off-grid systems.
Other municipalities set their own requirements, so ask yours before you buy, and ask your installer whether the application is included in the quote. Where Eskom supplies the property directly, its tariff page says customers with rooftop solar PV are required to be on a Homeflex tariff.
Two other things quotes often gloss over: battery lifespan (most lithium batteries are warrantied for a set number of charge cycles or years, not forever, so ask what happens at end of life) and inverter brand support (local parts and service availability differ a lot between brands, which matters more than the spec sheet once something actually breaks).
Tax breaks and selling power back
The individual rebate that let homeowners claim part of the cost of new solar panels only covered panels bought and first used between 1 March 2023 and 29 February 2024, and we haven't found an equivalent personal rebate for 2026, so check the SARS website for anything new.
Section 12B, the accelerated depreciation incentive that lets a taxpayer deduct a large share of a renewable energy asset's cost, generally applies to assets used to generate trading income rather than a simple home installation, so don't assume it applies to your household system without checking with an accountant first.
Selling excess power back to the grid is possible in some municipalities through a small-scale embedded generation (SSEG) programme, most notably Cape Town's, but buyback rates are set by each municipality and can change from one tariff year to the next, and plenty of municipalities offer nothing comparable. Treat a feed-in credit as a modest bonus on top of the value of not buying power during outages, not as the reason to size a system, and confirm your specific municipality's current programme and rate before counting on it.
How to choose a system
With national load shedding gone, the question has shifted from how big a system you can afford to what you need to get through unplanned cuts. Start from your actual essentials list, size the inverter (kVA) and battery (kWh) to that rather than to a worst-case scenario, use a registered electrician and get a COC for anything wired into your distribution board, and compare at least three quotes. Like-for-like quotes can differ by a wide margin, which is worth an extra week of shopping around.
Frequently asked questions
Is load shedding actually over in South Africa in 2026?
Nationally, yes for now: as of 9 October 2026 Eskom reports 511 consecutive days without load shedding, and the sixth and final Kusile unit entered commercial operation in September 2025. But that isn't the same as guaranteed power. Load reduction on specific feeders (Eskom says what remains is confined to selected areas in Gauteng and KwaZulu-Natal), ageing local infrastructure, cable theft and storm-related outages still cause unscheduled cuts in some areas. Most people who already own backup power are keeping it; many people buying one now are choosing smaller, cheaper systems than they would have in 2023.
What size system do I need just to keep the fridge, lights and Wi-Fi running?
That's a light load. A fridge can surge to around 1,800W when the compressor kicks in, though it draws far less once it is running; add a few LED lights, a router and laptop charging and you're still comfortably under what a 3 to 3.5kVA inverter can handle. A 5kWh lithium battery on that load typically gives several hours of runtime, which covers most outages. You only need to size up toward 5 to 8kVA and a bigger battery once you add a TV, microwave, kettle, air conditioning or a pool pump to the list.
Is a generator cheaper than a battery backup system?
Cheaper upfront, yes: a basic fixed generator can cost a fraction of a comparable battery system. But it comes with ongoing fuel costs, needs to run outdoors with ventilation, is noisy, and doesn't switch over seamlessly, so anything relying on constant power (a desktop computer, some medical equipment) will still drop out for a few seconds. A battery-based system costs more to install but switches over instantly, runs silently indoors, and if it's charged from solar panels rather than the grid, running it costs close to nothing once it's paid for itself.
Do I need a Certificate of Compliance for a home solar or inverter installation?
If it's wired into your distribution board rather than just plugged into a wall socket, yes: South African law requires an electrical Certificate of Compliance (COC) from a registered electrician for any installation connected to the fixed wiring of your home, and your municipality may also need to authorise the system before you switch it on (in Cape Town, any new solar or battery installation does). Skipping it also puts your insurance cover at risk: a household insurer may decline a claim linked to non-compliant electrical work, including a fire traced back to an uncertified solar or inverter installation.
General information only, not legal/tax/immigration/medical advice: confirm current rules and consult a qualified professional.