“One more thing,” Charlie said. “What?” “We need to have everyone save their urine.” “I am not drinking piss, Charlie.” “Not to drink. To recapture the water by evaporation. It’s like the waste reprocessing systems on the ship, only a far cruder version. Nevertheless, we can reclaim the water many times over if we’re diligent about it.” “But that’s not only gross, it’s also not going to last.” “I know. This is little more than a Band-Aid, when we need a whole lot more. But at least it should buy us some time.”
Considering the number of people -- yeah the solar still probably not be sufficient. Let's go Fremen people ...