agree. they’re likely playing around with the numbers. But chile was also mentioned in the article which says they getting solar electric for 2.9 cents a kwh. How likely is it that they fudged the numbers.
The Atacama Desert is one of the driest places on earth, so there would be very few days without sun. I assume the Arabian Peninsula also has mostly sunny days. They also have the advantage of cheap fossil fuel backup.
Oh, and lots of essentially free third-world labor, too.