We need all of the solar panels we can array to displace fossil fuel and stave off imminent environmental collapse. Only after we have built out enough solar a

We need all of the solar panels we can array to displace fossil fuel and stave off imminent environmental collapse. Only after we have built out enough solar and wind generating capacity, and (eventually) storage to entirely displace fossil burning will we have excess power that can justifiably be used for desalination. Even then, synthesizing hydrogen and ammonia for industry will absorb all the excess we can muster. Anyway, direct solar desalination is a much more efficient method (i.e., 100%) than relying on electric power (typically, in practice, <20%).