Just be careful that you don’t fall foul of your insurers in the process. “Rules homeowners should know before installing solar power” on MyBroadband lists four technical regulations to be particularly aware of.
For some practical advice on deciding whether or not to go the solar route in the first place, and if so how, read another MyBroadband article “What you should know before installing solar panels and batteries at your home”. Keep an eye also on the developing story around proposed new Eskom tariffs and “feed-in” tariffs.