Quick answer
If you work from home, run a fridge and freezer, or have any medical equipment, the answer is yes. Most Johannesburg homes get real value from a 5kVA inverter with around 5kWh of battery covering essential circuits only, scaling up to a full 8kW hybrid solar system with 10kWh or more. The single biggest determinant of whether you are happy with it is honest sizing.
What you can do now
- 1List what genuinely has to keep running — lights, plugs, fridge, Wi-Fi, security, and not much else
- 2Work out how many hours you need to cover in a typical outage
- 3Check your last twelve months of electricity bills for actual consumption rather than guessing
- 4Decide up front whether you want backup only, or backup plus solar generation
- 5Identify where the equipment will live, since inverters and batteries need ventilated, secure space
When to call a professional
Book a load survey before buying anything. Sizing badly is the most expensive mistake in this whole category — undersized and you are disappointed every outage, oversized and you have paid for capacity you never use. Insist that essential-loads wiring, an Electrical COC and the DB work are all in the quote, because those are what turn equipment into a working installation.
Typical cost in Johannesburg
Essentials 3kVA: R45,000 · 5kW hybrid: R85,000 · 8kW with solar: R160,000+
Indicative ranges only. We provide written, itemised quotes before any work.
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