What I don&#x27;t get is why they don&#x27;t just run the desalinization process at &quot;full speed&quot; when the sun is shining, and store the freshwater. Then you don&#x27;t need any batteries. Maybe the process is not amenable to scaling up and down with a variable power supply. You could possibly use giant capacitors to smooth the power supply, but maybe the economics still favor smaller facilities that run 24&#x2F;7, even though they need batteries.