Climate can affect solar drying. The ideal climate is one with low humidity and bright, strong sunshine. If you live in a humid or rainy area you may wish to dry foods with a dehydrator or in the oven. While drying in this manner will require some form of energy, the other benefits of dried food will still be available to you. Do not dry your food outside in an area with a lot of traffic or air pollution.
Contamination is possible from airborne emissions.
Turn food daily. Dry strong-flavored or odored foods by themselves. Drying trays can be made by simply using a frame and covering it with cheesecloth or plastic screen. Stretch tightly and fasten on the back with staples or tacks. Do not use metal screen unless you cover it with cheese cloth.