You mention that wealthy rsa citizens are switching to solar and t his will lead to failure of the national power producer

I googled there are only 400 000 za citizens that make above 1 000 000 zar as per za tax stat

1000000 at xe rate is approx 60 000 usd

There are approx 60-80 mil ppl in rsa

How does 400 000 (possibly half that in number households given that higher in comers earners marry other higher incomes earners)

Result in a income deficit enough to cause the power utility to go into red