Ill try. Im still ordering all the parts (solar panel, maybe 3d print?). The phone is actually, in many ways, the easiest to work with. Its also sorta strange. With termux, the best I can describe is that its UNIX based and then you can get the tools you are used to to make it truly gnu/linux. I had to put a plethora of tools to make it useful.

Ill be adding more in the coming weeks. https://solar.chrisco.me/