By Justin Gardner

Preserving food is an essential skill of the homesteading lifestyle. Whether you grow the food yourself or purchase it in bulk at farmers markets, some kind of preservation is needed so you can have certain fruits and vegetables later in the year.

While canning, pickling and freezing work well, adding dehydration to the mix gives you even more diversity. Instead of spending lots of money on a fancy machine, you can make a solar food dehydrator for much less, and take pride in your DIY project.





Dennis Scanlin of the Appropriate Technology Program at Appalachian State University spent nearly 20 years testing and experimenting solar dehydrator designs. His solar dehydration unit can dry large amounts of food quickly, and is wheeled for easy movement. Plus, you can add light bulbs to improve operation when the weather is cloudy or humid.

With a few tools and basic woodworking skills, this solar food dehydrator can become a vital part of your homestead.

This design relies on indirect solar power, meaning the drying food is not exposed to the sun but instead to solar-heated air. Our dryer takes advantage of the natural process of rising hot air to operate efficiently without any electric fans. The drying chamber of this dehydrator supports 11 trays to hold up to 10 pounds of thinly sliced food — about 35 to 40 medium-sized apples, for reference. It can dry this amount of food in two sunny days, or about half this amount of food in one sunny day because of better ventilation and reduced food mass. The temperature inside the chamber can easily soar to more than 140 degrees Fahrenheit.

Visit here for detailed instructions on building and using Scanlin’s solar food dehydrator.

Materials List

One 4-by-8-foot sheet of 3/4-inch plywood, exterior grade

One 4-by-8-foot sheet of 1/4-inch plywood, exterior grade

Five 1-by-6s, 8 feet long, pressure-treated

Two 2-by-4s, 8 feet long, pressure-treated

2 wheels, 8-inch-diameter

36-inch-long, 1/2-inch-diameter steel axle

2 heavy-duty hinges

Six 27-by-96-inch sheets of metal lath

3 square feet aluminum screen

One 2-by-6-foot sheet of FRP (fiber-reinforced plastic)

30 square feet food-grade screening

Heavy-duty aluminum foil, 25-foot roll

3/4-by-1/8-inch aluminum battens, 16 feet total length

1 1/4-inch No.8 exterior-grade Phillips flat-head screws (100 or more)

1 5/8-inch No. 8 exterior-grade Phillips flat-head screws (about 30)

1-inch No. 8 round-head screws (about 20)

Eight 3/8-by-3-inch bolts, nuts and washers

Four 3/8-by-4-inch bolts, nuts and washers

4 hook-and-eye fasteners

1/4-inch staples

Exterior-grade latex paint and primer, any light color

High-temperature spray paint, black

Waterproof glue

Silicone caulk

Weatherstripping

Shingles

Tools List

Circular saw with rip guide

Router with 3/4-inch straight bit and cutting guide

Electric drill with No. 8 pilot-hole and countersinking bits

2 sawhorses

Long straightedge

Marking pencil

Protractor

Framing square

Level

Tape measure

Staple gun

Caulk gun

Paintbrush

Wrenches

Tinsnips

Utility knife

Clamps

Heavy work gloves

Justin Gardner writes for TheFreeThoughtProject.com