True, but if you have energy that can't be easily stored or transported, it might be worthwhile using that energy to make clean water. For example, the solar p

True, but if you have energy that can't be easily stored or transported, it might be worthwhile using that energy to make clean water. For example, the solar panels in 3rd world countries can only charge batteries up to a certain point. The solar cells would still generate energy but there's no place to store it so one might as well use the excess for clarifying water.