Returning dead thread to life. One friend sent me link with this project, and a bit deeper study and seems this project is not totally "one more dehumidifier with peltier/compressor scam".
Take a look in one of creator patents:
https://patents.google.com/patent/WO2016081863A1/en?oq=Cody+FriesenSo basically math equation dave is doing, related to basic dehumidifier model powered by electric solar panel, which is not highly efficient (due solar panels electricity generation efficiency), but here, seems they use large panels for heating, and probably if they absorb humidity from air to some sort of desiccant, overnight or morning(when air humidity also higher), they they can use sun heat to do desorption, and let's say evaporate this water and get hot, dense water vapor in chamber, which is much easier to condensate by just cooling it down to environment temperature. I guess in such case energy equation is quite different.
They say something about regeneration liquid, so it looks like even more advanced than i thought.
Still, operating cost of device is way too high.