It just makes sense
If you have a finite fuel supply that can be used any time and any weather and an infinite fuel supply that can be used in sunny conditions...
You can make your finite fuel supply last much much longer if you take advantage of the infinite fuel supply when it is available.
Solar cooking is the least costly means of cooking, dehydrating, securing safe water.
Prepared? Be better prepared by adding solar cooking devices to your survival equipment. Then start using solar on a daily basis.