The largest single site solar farm in the world just came online in the UAE! Some facts about this project:

It reached financial close in 2020
It’s capable of producing 2000MW (that’s 40% of Nigeria’s entire electricity generation)
It’s expected to deliver electricity at $0.013/KWh. Even at $/N850, that’s circa N11/KWh. (Note, that’s not necessarily the final cost to consumer due to transmission and distribution costs)
It cost circa $1bln.

https://masdar.ae/en/news/newsroom/worlds-largest--single-site-solar-power-plant-inaugurated

Now the question is, what are we doing in Nigeria? I’m not even suggested that the federal government should put up that kind of money. With private capital we should be able to deliver a similar project, even if not as big as this. A 300 MW solar power plant should be doable in say Plateau or Nassarawa state. And it could be delivered in 3 to 5 years if we were serious!

One of the benefits of solar is that it helps with the electricity generation mix, which is currently too reliant on gas. Another benefit is that unlike thermal plants that rely on gas, which then require a lot of opex for the purchase of gas, a solar power plant has no fuel costs, therefore it would help to bring down the average cost of a kilowatt hour of electricity.