Bert sa

I live in Honeydew, often cable theft & just poor infrastructure. Sometimes 5 days no power. It's a very worthwhile tangible insurance policy. 
Also if you track the exponential tarrif increases you save in the long run. One needs to get into the market having these foundations at the back of your mind. 

Are you not just better off getting another battery to absorb the extra pv and discharge at night to off set it? 

Hi Steve, thanks for the feedback.
In hindsight I should have started a new topic about this.
I had a look at this generator already before but what worried me is their own statement:
 This generator is not suitable for use as a backup to a solar inverter due to harmonic feedback. Learn More
https://mzansipower.co.za/product/6-5kva-1-phase-diesel-generator-bp6500s/
If you go to the "learn more" you get an article from Bundupower explaining the problematic harmonics between the inverter and generator, especially Voltronic and clones thereof inverters, also a list of inverters known to work and not to work.
But as you experienced the Kodak OG7.2 to work well my, Kodak OG10kw might/should also work? I send them an email to check this.
We are still connected to the grid and used this grid for only 7kw in total the last 5 months but obviously this will increase during the rainy season, the grid is still by far the cheapest and convenient backup at the moment as we currently don't pay a connection fee , but if they come with a ridiculous connection fee of R900 a month as rumored for the couple of kw's we use then I want to go off grid and need a generator for back-up.
 

During your wife's cooking the usage (including 2kw of the pool pump) is about 11-13kw non-stop for over 2 hours, that is a hell of a lot of cooking.
Does this sound right or is EVERITHING maybe somehow measured double?

The solar charge controller (SCC) will generally take enough panel power so that the solar charge controller output limits itself to its rated value. For recent 5 kVA models, this is generally 80 A. So 80 A times your battery voltage plus a few percent, so just over 4 kW. The rest is "lost" (it just heats the panels a little more than they otherwise would).
Axperts routinely overshoot their targets for a few seconds, sometimes 10 seconds or so, so you may see occasional short burts over this value.
It gets a little more complex with the high voltage SCC models, because there are additional bottlenecks, but the result is broadly the same.

I know with Victron charge controllers you can push above it and the inverter will just throttle it to the max output. 

But i suppose an expert on Mecer will be able to give you a definitive answer