I just bought a 6,5 watt 14 volt folding panel. They make a 15 watt version as well. I bought a motorcycle battery that I can put the panel on to trickle charge it during the sunlight hours. By attaching a converter to the 12 volt battery, i get 240 volts (european) to run my battery chargers or what ever I might need for a short time. By stocking up on good rechargeable batteries of all types I can run efficient diode flashlights.
This is about as primitive as it gets. It would be better to use a 80 watt solar panel and a bigger battery, but heck. When the s*** hits the fan, we might need to be mobile.
This is my solution.
