The amount of energy required to evaporate water means you need a lot of sunlight (area) to evaporate a relatively small amount of salt water. You can save a l

The amount of energy required to evaporate water means you need a lot of sunlight (area) to evaporate a relatively small amount of salt water. You can save a lot of energy by getting some water out of sea water, leaving extra-salty brine, rather than trying to get all the water out, leaving dry salt.