@10_X_eng We have salt, sulfur, iron reducing bacteria and sand.
Each stage takes it close to just salt water which was over 10k ppm or something like that.
Mainly mesh filters and carbon filters as well as peroxide injection.
@AdamSinger Depending on your loads, a "portable" all-in-one unit that you can plug a few solar panels and devices into could work.
If you want conditioned space, the system might be a little bigger to run AC.
I've got diy systems as small as a few hundred watts all the way up to 10k watts