How to Charge Batteries in the Middle of Nowhere
https://www.youtube.com/watch?v=MEp5OcpNj04
I have a bunch of Goal Zero solar chargers and accessories. They do work, and work well. I took a set of small solar panels and battery pack (folds up about the size of an iPad,and has a carabiner clip for hanging) to Hawaii. Used it on Waikiki beach and it kept my iPad fully charged all day, while using apps and playing music.
Also have a 400 watt Goal Zero battery at home. We had a power failure in the neighborhood a few weeks ago. I plugged a bunch of stuff into the battery and it kept us going for several hours until the power came back. My router, modem, computer and security cameras are on UPS backup, and I plugged the UPS into the solar battery, as well as our entertainment gear so the family could use Netflix and TV. The solar battery recharges via a couple large solar panels. Great for emergencies. Power outage had no effect on us.