I did a post several years back on solar charging of cell phones, and the technology has changed a tiny but in those intervening years. I have a Goal0 Nomad panel and decided to test it out the other day. I took an old dead iPhone, USB cable, and the Nomad7 and set them out in the yard directly in the sun to charge.
A couple things you have to keep in mind – first, take the device you’re charging and protect it from the sun and heat. If you don’t, they’ll go into thermal shutdown mode. I usually put the phone under the panel but off the conductive ground. Secondly, and this is really important, higher end electronics like cellphones are very fussy about charging irregularities. If the voltage fluctuates, as it might when the sun goes behind a cloud, that change in electrical input may cause your device to go out of charge mode or something. The solution is to use the panel to charge a battery pack and then use the battery pack to charge the phone. Goal0 is now selling a package that does exactly that – GOAL ZERO 42020 Venture 30 Solar Recharging Kit.
This is pretty much your one-stop solution to this:
No doubt someone will opine that in a blackout condition the cell towers will mostly be dead too, so why worry about your cellphone? If you think that, then you really are too short-sighted to be a survivalist. Turn in your camo and freeze-drieds and take up another hoby..like model railroads or something.
Even in a world with cell towers down, your phone takes pictures, takes video, does math functions, accesses files from local networks, acts as a flashlight, provides entertainment, tracks supplies, etc, etc. In short, it’s a very useful tool even when it’s not being used as a communication device. (And, yes, you can even use them, to a degree, for communication using devices such as Go tenna.)
Anyway, I plugged in the dead iPhone, set it under the panel, and came back a few hours later and…100% charged.
Moral of the story is that although having a generator is nice, it’s a bit overkill for just charging phones in a power-failure situation. So…these panels (with the battery) are excellent alternatives.



