My family has 4 iphones, and I will probably stop using my iphone and start using an old Alcatel one touch by the end of this month. I can't really afford to buy an entire solar panel set up for the entire house right now, but I can probably start small.
I know I should look for used solar chargers first, just because of the whole "mining for the raw materials" and such. Is there anything I should think of before I go on Ebay, find one used, buy at least one or two, and use them? I understand they aren't perfect and I will need to protect them, I am thinking more like "does it make more sense to get some from a store near me or to buy used?" or "are there other ways I can start small with renewable energy since I need to actually understand all this solar power jargon before I buy a modular panel?"