I agree we need to know how much water are you looking to clean up? A lost in the woods technic uses passive solar that can be adapted to home use. Lost in the woods? Dig a hole in the ground till you hit wet dirt, put a clean container in the middle of the hole, cover said hole with plastic wrap and put some type of weight in the middle of the plastic so it is tight and concave. Moisture drops form on the plastic and fall into the container you put in the hole. To adapt this for home use fill barrels, home depot buckets or what have you with ocean water, float your clean water container and cover the same as you did the hole. The solution requires some DIY but no energy used other than calories in toting water in the barrels, buckets etc. :geek: