Pakistan’s story is unique, said Mustafa Amjad, program director at Renewables First, an energy think tank based in Islamabad. Solar has been adopted at mass scale in countries including Vietnam and South Africa, “but none have had the speed and scale that Pakistan has had,” he told CNN.

There’s one particular aspect fascinating experts: The solar boom is a grassroots revolution and almost none of it is in the form of big solar farms. “There is no policy push that is driving this; this is essentially people-led and market driven,” Amjad said.