That's to go offgrid, and not need Eskom at all. To be load shedding proof, all you need is a few hours of battery backup and an inverter. You use Eskom power to charge it (when they're up) and you can keep going through the load shedding without a problem.
Did you check the OP's requirements?
Dbl storey large house, but just need basics running during load shedding (lights, tv, couple of fridges, server, pc, coffee machine etc)
That's probably 2-3 kW alone without the "etc" devices.
Now go price a 5kVA sine wave inverter and batteries and post the price here for comparison.
The inverter alone is going to be in the R20K to R30K range regardless if he used a single battery which lasts for 5 minutes or a bank of batteries which last for 4 hours.
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