Preppers’ PING!
I am embarrassed to say that I have not considered an alternate energy source for the long term. I've been assuming that your basic camp-stoves/grills would be fine for cooking and candles or oil lamps would be fine for light in a true SHTF scenario.
We have a “wind-up” type radio, but re-energizing batteries without an outlet just never really occurred to me before now - I guess I thought stored batteries would last forever. Thanks for the Solar info!