Comment by tancop

Solar is incredibly cheap and it's a perfect match for desalination because you can scale the water flow based on available power. And the places that need it the most are deserts with a lot of sunshine and empty land. We're at a point where generating power is almost never the issue.

The actual problem is making the desalination tech itself cheap and easy to maintain so poor countries can afford it. Right now it's only a large scale thing in relatively rich and tech advanced states like Saudi or Israel.