It’s not clear from the article, but if this is a direct solar-to-dessalination I can understand how it uses less energy (why does it use any energy at all?) than other methods with pumps and such, the issue is rate maybe, but I can’t find a paper about this.

Found fuelcellsworks.com/…/malaga-students-patent-an-in… which says it produces 1 cubic meter per day, which is great for small-scale seaside production. Again, I have no access to details of how 1 square meter of sunlight can dessalinate 1 cubic meter of water per day, but it’s great if it works, just wondering why solar dessalination hadn’t been tried to this degree of success before.