List what must stay on: lights, internet, TV, fridge. Add up the watts, then size the inverter 25% above your peak load. Lithium batteries cost more upfront but last far longer than lead-acid.
Load-Shedding Survival: Choosing an Inverter and Battery Setup
What size system you actually need for lights, WiFi and a fridge ??? explained simply.
By Willem Steyn · Last updated August 2026
Frequently asked questions
What size inverter for essentials?
A 1???3 kVA inverter with one 100Ah lithium battery covers lights, WiFi and devices.
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