Load shedding

Does solar work during load shedding in South Africa?

Only if you have a hybrid (or off-grid) inverter plus battery — or another backup source. Standard grid-tied solar disconnects when the municipal/Eskom grid fails (anti-islanding). Panels alone will not keep your lights on during a stage.

Updated 26 October 2026 · Illustrative ranges — not a formal quote or legal advice.

Answer first: Only if you have a hybrid (or off-grid) inverter plus battery — or another backup source such as a properly interlocked generator. Standard grid-tied solar disconnects when the municipal/Eskom grid fails (anti-islanding). Panels alone will not keep your lights on during a stage.

Why grid-tied systems go dark

Anti-islanding protection stops the inverter feeding power into a dead grid so municipal workers stay safe. That same NRS 097 rule means a pure grid-tied string inverter shuts down your house PV when the grid drops — even at midday with a clear sky. Detail: NRS 097.

System type	During shedding (day)	During shedding (night)
Grid-tied string, no battery	PV off (anti-islanding)	Dark
Hybrid + battery (essential loads)	PV can charge battery / run essentials if inverter allows	Battery runs essentials until empty
Hybrid whole-house backup	Same idea at higher kW	Needs more kWh
Generator + changeover/ATS	Generator can carry loads if fuelled	Same — noise, fuel, interlocks

What actually keeps power on

Hybrid inverter + LiFePO₄ battery on essential (or whole-house) backup circuits
Correct changeover / backup wiring and commissioning — ATS / changeover
Enough usable kWh for the outage length you care about — Stage 6 sizing, DoD
Realistic essential-load list — essential vs non-essential

Daytime PV during a stage

On a well-commissioned hybrid, daytime sun can recharge the battery and supply backup loads while the grid is down — within the inverter’s islanded limits. Do not assume the full nameplate array is available for heavy loads (oven + geyser + EV) on a small hybrid; continuous backup kW is the binding constraint. Keep EV charging off a small backup pack — EV load management.

Savings vs backup — both matter

Many households buy solar for bill cut and discover backup is the emotional win. Retail kWh avoided at ~R3.30–R4.70 still drives payback (tariffs); battery kWh is insurance against stages and evening peaks. Grid-charging the battery before a scheduled stage can help — grid-charge before shedding.

Quote questions

Which circuits stay up? Continuous and surge kW ratings?
Usable kWh at the DoD the warranty allows?
Behaviour when PV is producing during an outage?
CoC and SSEG path included? — CoC, SSEG

Stage schedules vs battery anxiety

Stage 2 evenings differ from Stage 6 weekends. Size usable kWh for the outage pattern you actually fear, not internet horror stories — then add margin for fridge restarts and Wi-Fi. Many families sleep through Stage 4 on a 5–10 kWh usable pack with a tight essential board; whole-house air-con backup is a different budget.

Myths to ignore

“Panels will run the house whenever the sun is out” — not on a pure grid-tied string inverter.
“Any lithium battery works with any inverter” — chemistry and protocols matter — compatibility.
“Export settings mean I am already registered” — export ≠ SSEG approval.

Quick FAQ

Will lights flicker at changeover? Good hybrids transfer fast; ask about UPS-grade behaviour for PCs.
Can I charge the battery from the grid before shedding? Often yes — grid-charge guide.
Does solar remove load shedding? No — it softens your experience if sized and wired correctly.

Appliance reality on backup

LED lights and a fridge are easy wins. Induction hobs, underfloor heating, large air-cons and pool pumps are how backup boards collapse. Decide lifestyle rules before install: microwave yes, oven no; kettle yes if staggered; geyser on timer when grid returns. Write the rules on a kitchen card so visitors do not trip the hybrid at dinner during Stage 3.

Monitoring that prevents surprises

Use the inverter app to watch state of charge into known shedding windows. Some households automate grid-charge-to-80% when EskomSePush (or municipal notices) signal an evening stage. Others keep a floor SoC so the pack never empties before sunrise PV. Pick a policy and test it on a mild stage before a harsh week. Related toolkit: load shedding hub.

Neighbourhood generators and dirty power

If you ever feed a portable generator into a changeover, synchronisation and quality matter. Cheap sets with wild voltage can upset hybrid electronics. Prefer inverter-generators or proper standby sets with ATS logic designed by the electrician — ATS page. Never back-feed through a stove plug “just for tonight”.

Community deep-freeze clubs and shared estate generators sit outside this homeowner FAQ — estate rules and bulk meters change the wiring politics entirely.

Daytime shedding with full sun — what you should see

On a healthy hybrid you should see PV production continuing into battery charge and essential loads while the grid icon shows islanded/offline. If PV drops to zero whenever the grid drops, either you have a string inverter, an incorrect setting, or a wiring topology that is not actually hybrid-backed. Demand a demonstration before final payment. Night-time stages are a pure battery test — watch depth-of-discharge against the warranty floor (DoD).

Keep a paper list of breakers on the essential board next to the DB so you are not rediscovering the design with a torch.

When to add capacity versus change behaviour

If the pack hits empty before stages end, you can buy more kWh, shrink the essential board, or pre-charge from the grid. Behaviour changes are free; kWh is not. Many households discover the kettle-plus-microwave habit matters more than another 2 kWh of marketing capacity. Re-run the audit after two weeks of real stages with monitoring enabled.