Chetan Chiba

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. 👍

I purchased one of these
Works like a dream and I use it to work out when to switch my geysers on to get the max out of my solar.
 

Must admit this thread has been a great discussion & journey into both worlds of Voltronics & Sunsynk/ Deye. Glad it did not deteriorate into a A Vs B & this is better than that. I still think both machines are good value & each has his place in the market. 
To me the premise of any installation starts with a user requirement & then you look at what equipment solves that. @MKRandburgit's not annoying at all. It's about information & learning. I haven't stopped learning & the world of solar is just too broad to know everything. But with rubbing shoulders with a specific experience of Equipment & by seeking the technical publications we get to solving the problem. 
No point me as installer carrying out an installation & the user hasn't solved the original requirement. Otherwise we have waisted our time & your money. Nothing good can come out of this type of experience. I am not a Sunsynk specialist but if I was approached with such an installation requirement I would rather refer this to a specialist installer in that domain that I trust to get a positive outcome. 

It always depends on budget. I would always go lithium even if its a smaller battery for now and then add another following month. I had a Growwatt 5000 and it worked well with the Narada Npfc 100 voltage base and found that sweet zone and they were happy for years, I used a few sonoff's to manage the loads and battery low directly from the nc/no ports. Now I got the Sunsynk and its a beautifully machine I have lots of testig still left but my BMS to battery is working well and I made a small mistakes. I had my discharge rate set to low so when the wife made microwave horlics the system shut down
Them I increased the discharge current 55amps which is still low as I could go 100Amps but I like to preserve the battery. Let me known if you need any thing.

Hi How are you?  I am not a installer and definitely have lots to learn, I do have a few years personal experience with the more cost effective inverters like Mecer and Growatt. I only recently bought a Sunsynk and its definitely one of the best investments. Its really a great inverter and has so many features it exceeded expectations. It is a bit more expansive but definitely worth the money. If you planning to add solar panel's I would recommend it. Honestly every inverter is awesome if you live in South Africa. 
Aleks

I see there is a video in that topic and they use an inverter generator...
Sunsynk did a video on Q&A where one part was around generators and they say not to use inverter generators, but then again he's also saying to use a hefty generator so maybe the higher capacity generators, with a load well under it's capacity, would be stable enough...
Sunsynk video link below - start watching from about time 9:50 to about 15:00
https://www.sunsynk.org/post/questions-and-answers-from-our-forum?postId=fd545c93-3ab7-4ea3-90d6-ce537404426c

I currently have a SunSynk 8.8 kW inverter which works with an old Faraday 7.5 KVA petrol generator. I still have it connected to a change over switch to take the place of Eskom. With the Voltage and Frequency opened up, it runs the house through the inverter, and charges the batteries too.
The battery charging current must be brought down to allow for house loads too. Never push the generator to its capacity, or the inverter will drop it out. Depending on the generator you will have to find out how far you can "push it" with a total load. 👍
With my panels and batteries, I haven't used the generator this year.
May you begin to enjoy your experimentation and expensive hobby, as Eskom goes down the plug hole. 😂