Rogan

Like all the other good people have advised, it all depends on your budget, and your loads you want to supply.
I have a SunSynk 8.8 kW inverter, so I'll try and explain it's setup, and it's  5.5 kW "brother".
 
First, your mains AC supply comes in from Eskom, through your MCB (Main Circuit Breaker) to your meter.
Just after your meter is the inverter CT (Current Transformer) coil, which is connected to the inverter, and measures the amount of power coming into or out of (Export) your house.
Now, between the CT coil and the inverter you can have Non-Essential loads wired like geysers, stoves, etc, which will not be powered by solar or battery if Eskom is Off.
Not withstanding @WannabeSolarSparky transfer switch method.
When Eskom is On, these loads can be "back-fed" by the inverter with excess solar / battery power, and save you on your Eskom bill. The Max you can "back-feed" to these Non-Essential loads is the rating of the inverter. On a SunSynk 8.8 kW this will be +- 8 kW, on a 5.5 kW it'll be +- 5 kW. If these loads require more power than the inverter can give, the power will be supplemented from Eskom through the MCB and your meter, up to the rating of your MCB. This is possible because the SunSynk is a bi-directional machine, which can take power in from Eskom, or push power back towards Eskom. Using the CT coil, the power can be stopped at the CT coil, (No Export) or even pushed back into the Eskom grid (Export), and supply your neighbors. 😂
 
Then the inverter has an output called UPS (Uninterruptible Power Supply), this is the Essential loads you want to always have power no-matter what Eskom does.
When Eskom is On, these loads will be fed by solar, battery, Eskom, depending on the "System Mode" Timer settings. Normally most people use the solar to charge the batteries, power the Essential loads, and if loads are high, draw some power from Eskom. The SunSynk 5.5 kW can power an Essential load of +- 8 kW by combining Solar / Battery and Eskom. The SunSynk 8.8 kW can power an Essential load of +- 12 kW by combining Solar / Battery and Eskom. If Eskom is Off, (load-shedding) the inverter will only be able to supply an Essential load equal to its rating, i.e. 5 kW or 8 kW.
After all this waffling, I have my entire house wired through the inverter, on the Essential load, as I wish to choose which loads are required during load-shedding or power failures.
Hope you soon join the power independent gang. 👍

Is the demand creating a great time for installers.
A quote I received, ex VAT.
8x Canadian Solar 540W @ 3550 = 28400
Railing & cables 3900
600V Protection Box 5450
Battery shelving for 4. 5650
5K Sunsynk. 23150
Batteries: Kodak 3.6kWH 48V x 3 pack: 68000
Transport: 1800
Electrician Installation: 54000
Supervision and organisation: 18000
Total ex vat = 204450
Incl = 235118.
 

Is the demand creating a great time for installers.
A quote I received, ex VAT.
8x Canadian Solar 540W @ 3550 = 28400
Railing & cables 3900
600V Protection Box 5450
Battery shelving for 4. 5650
5K Sunsynk. 23150
Batteries: Kodak 3.6kWH 48V x 3 pack: 68000
Transport: 1800
Electrician Installation: 54000
Supervision and organisation: 18000
Total ex vat = 204450
Incl = 235118.
 

Is the demand creating a great time for installers.
A quote I received, ex VAT.
8x Canadian Solar 540W @ 3550 = 28400
Railing & cables 3900
600V Protection Box 5450
Battery shelving for 4. 5650
5K Sunsynk. 23150
Batteries: Kodak 3.6kWH 48V x 3 pack: 68000
Transport: 1800
Electrician Installation: 54000
Supervision and organisation: 18000
Total ex vat = 204450
Incl = 235118.
 

Is the demand creating a great time for installers.
A quote I received, ex VAT.
8x Canadian Solar 540W @ 3550 = 28400
Railing & cables 3900
600V Protection Box 5450
Battery shelving for 4. 5650
5K Sunsynk. 23150
Batteries: Kodak 3.6kWH 48V x 3 pack: 68000
Transport: 1800
Electrician Installation: 54000
Supervision and organisation: 18000
Total ex vat = 204450
Incl = 235118.
 

Is the demand creating a great time for installers.
A quote I received, ex VAT.
8x Canadian Solar 540W @ 3550 = 28400
Railing & cables 3900
600V Protection Box 5450
Battery shelving for 4. 5650
5K Sunsynk. 23150
Batteries: Kodak 3.6kWH 48V x 3 pack: 68000
Transport: 1800
Electrician Installation: 54000
Supervision and organisation: 18000
Total ex vat = 204450
Incl = 235118.