And if you borrow the money the total interest that will be paid. Someone buying a R200,000 system and paying it back at R2000 per month is going to end up paying over R100,000 in interest.
A monthly R2 000 electricity bill today will be more than R4 000 per month in year 10 with a conservative 9% annual Eskom increase. That's over R360k just in electricity purchases over 10 years.
That R200k loan would be long paid off by then and the person that opted not to go with solar is still going to have to spend money every month in electricity. And the guy that took the loan and got solar can still expect a further 5 to years out of the system before needing to replace anything major.
Panels should last for 30 years and even then they will still work, just at a reduced output of 80% of their rated capacity.
Batteries are the same. 6 000 cycles comes to 16 years if cycling them once per day. And again they won't be dead just reduced capacity.
A decent inverter might have a 5 year guarantee but the design life is at least 10 years.
Electricity is a basic need and paying for 15 years worth by going solar is a much better option than being dependent on the government to provide it as clearly they are not capable of doing so.
Solar plus storage is cheaper today in any calculation you try and throw at it. Using cash, taking out a loan, extending your bond, etc. But that's not the only consideration as you cannot put a price on not having to go through loadshedding.
This my real life graph and in 2 years time my cost/kWh is going to be less than anything CoCT can sell me.

