I kind of want a "science journalist" "specializing in the climate change field" to understand the difference.

Understanding the difference between power and energy is really the most crucial aspect you can imagine, here. Still they keep failing at this.

But in this case what was being discussed was the rate at which South Africa converted solar energy into electrical energy, which is a power, and the journalist correctly used units of power. Many journalists are indeed staggeringly incompetent, but in this case you are the one who is mistaken.

Agreed, it would be great if everything could always be technically accurate, but like fetch, it is never going to happen. It is wrong basically everywhere. Which is understandable as common vernacular readily interchanges energy and power.