What a weird way of writing a news article!

overcome days with insufficient sunlight by switching to wind power generation to produce electricity.

So, they basically turn on the wind when there is no sunlight? And if there is enough sunlight, they don’t need it to be windy, so the wind is not kept on?!
Obviously the idea is that the reader figures out that this is just North Koreans saying North Korean things. But yes, solar power is nice because you can rely on it. And it makes sense for a country in a situation such that of North Korea.