Here is a solar dehydrator that uses a solar heat collector and dc powered fans to push hot air through the dehydration chamber. I built without plans and based the size of the solar collector on how the beer cans would fit in when stacked up. The fans aren’t needed, but can improve the air flow. They use so little wattage; they can run off of a small 10-15w solar panel. Or you can plug them in.
Step 1: Sizing the Solar Collector
Step 2: Build the Frame
Step 3: Roof Supports and Solar Collector Mounting
Step 4: Solar Collector Bottom and Air Vents
I used "CoolerGuys" dual blower computer cooling fans from Amazon. They're variable speed and built to be used in a hot environment so I thought they would be good for this application.