Natural Solar Food Dehydrator: Money Saving 3-Step Project

Solar Food Dehydrator

Drying is a form of food preservation because by getting rid of moisture, you prevent bacteria from ruining your fruits and vegetables. It’s a great snack idea as well, especially for the kids!

But electric dehydrators can be too energy-consuming as they run all day long. If you live in a tropical area or where you get good sun for at least a few months a year, this solar food dehydrator can be a good alternative for you.

It’s a simple design food dehydrator that is made out of reclaimed materials. The plywood used is a scrap piece. The 2x4s came from an old ladder. And the window is an old house window.

Aside from being energy-saving, this DIY project is also inexpensive depending on the materials that you already have. You only have to make sure that your materials are non-toxic if you are going to use reclaimed wood.

DIY Solar Food Dehydrator

Read on to learn how to build your own solar food dehydrator! Don’t forget to take note of the dehydrating tips that follow.

How do you think your DIY solar food dehydrator can be further improved?

What are the materials needed to build a solar food dehydrator


  • Thin plywood
  • 2×4″ Lumber – 4-1/4′ long
  • 2×2″ Lumber – 10′ long
  • 20×23-1/8″ Window (or a suitable slab of clear plastic)
  • Screen – for covering vents
  • Stockings (or any stretchable cloth) – for drying rack
  • 2 Hinges
  • Screws
  • Thermometer
  • Hook and string – to fasten the rear door
  • Caulk


  • Staple gun
  • Table saw
  • Measuring tape

How to improve your solar food dehydrator

1. Understanding the design

In the front of your solar food dehydrator, there are vents underneath which are hidden in the image. The darker section is a piece of heat-absorbent material; we used painted metal for this dehydrator, but other dark materials will suffice. The food itself is placed on the shelf, which will be made out of a cloth screen.

Other screen-like materials can be used, but take chemical leeching into consideration to prevent contamination. The back piece of plywood can be opened to remove the shelf and provide additional ventilation for your solar food dehydrator.

Here is a checklist for the plywood pieces:

  • 1′ x 23 1/4″ (Top)
  • Two 20″ x 12″ x 26 1/8″ x 14 1/8″ (sides). This has a diagonal cut.
  • 26 1/8″ x 23 1/16″ (bottom). This will be trimmed to fit legs and vents.
  • 14 1/8″ x 23 1/16″ (back). This will be on the hinges.

2. Assemble the frame

Remember to drill, then screw to prevent splitting of your solar food dehydrator wood.

  1. Cut 2″ x 4″ notches on the bottom plywood for legs. Cut out 2″ x 4″ slits for ventilation.
  2. Construct the base first as shown in the image.
  3. Fasten side pieces of plywood to the legs.
  4. Attach the rear plywood piece.
  5. Screw 2″ x 2″ on top of the side pieces to anchor the top piece. (This becomes clearer after looking at the second image below).

3. Additional components

Clean the solar food dehydrator parts before adding them.

  1. Size and insert a heat-absorbing shelf (approximately measures 23″ x 20″) to your solar food dehydrator. This rests on the top of the legs.
  2. Stretch and staple material over a 14″ x 22 1/2″ frame made of 2″ x 2″ pieces to make a drying screen for your solar food dehydrator.
  3. Cut and attach a support piece for the drying screen.
  4. Attach the window to your solar food dehydrator. Caulking the borders is recommended, but it is optional if the window is perfectly flat against the frame.
  5. Cover vents with screen material to prevent insects from entering your solar food dehydrator.
  6. Place the thermometer inside, ideally close to the drying screen rack.

Important Dehydration tips to remember

1/ The optimal temperature for dehydration is normally between 100 and 140 degrees Fahrenheit. Temperatures below this range cause bacteria to grow, while temperatures above this range cause food items to be cooked.

To achieve this balance, it is essential to monitor the solar food dehydrator storage area’s temperature and ensure it remains within the optimal range. Additionally, the rear door of the solar food dehydrator unit needs to be left open to maintain the desired temperature.

2/ Different fruits and vegetables have different optimum drying temperature ranges. Researching the specific product you are drying in your solar food dehydrator is essential in order to ensure that you are using the most suitable temperatures for the best quality results.

3/ Remember to store your products in a dry place when moving them out of your solar food dehydrator.

Are there Premade Food Dehydrators?

Solar food dehydrators are becoming increasingly popular among home gardeners and health-conscious individuals looking to preserve their fresh produce in a way that maximizes nutritional content.

Solar dehydrators use the sun’s heat to draw out moisture from fruits and vegetables, creating a shelf-stable product with a long shelf life.

However, pre-built or power-operated food dehydrators are now available. They are a popular kitchen appliance among home cooks because they allow them to quickly and easily preserve a variety of foods.

With the increasing demand for these appliances, many manufacturers have begun to offer dehydrators in a variety of shapes, sizes, and price points, allowing you to find the perfect one for your needs.

4 Best Premade Food Dehydrators

1. BEST OVERALL: COSORI Stainless Steel Food Dehydrator Machine

This dehydrator is perfect for those who want to make healthier snacks and treats for themselves or their loved ones. Crafted with food-grade stainless steel and a glass front door, this solar food dehydrator alternative is sure to provide a long-lasting and dependable appliance.

It is perfect for drying beef jerky, snacks, fruit leathers, bread crumbs, and dog treats. Herbs can also be preserved. Its efficient design allows for an even distribution of heat and airflow, helping to ensure that your products are dried evenly and to the desired consistency.


  • The digital control panel on the device allows precise timing in 30-minute increments up to 48 hours in length
  • Its hot air circulation system is an advantageous process for making a variety of delicious food like jerky, yogurt, and dried fruit
  • There is an adjustable temperature range for drying foods, from 95º℉-165ºF, and should be followed according to the specific recipe
  • It has an automatic shutoff feature that ensures the device is not left on for an extended period of time, saving you energy and money
  • COSORI Chefs Team provides 50 recipes designed specifically for beginners


  • Additional mesh screens must be purchased
  • Not as eco-friendly as a solar food dehydrator

This product is an invaluable addition to any home. “We’ve had this for almost two years and cannot live without it,” explains a buyer. “In uncertain times it allows us to buy things when they’re available, and dehydrate them for when they’re not.”

But, it only has one mesh screen and can be also a costly inconvenience for buyers. We hope the manufacturer takes the necessary steps to ensure that future customers receive any additional items for better product operation. “Nice machine that seems to work great but it came with ONLY 1 MESH SCREEN and 6 metal trays,” says a buyer. Unit is expensive and now I have to buy extra mesh.”

2. MOST COMPACT: Elite Gourmet Stackable Food Dehydrator 5 BPA-Free 11.4″ Trays

The fan of this food dehydrator is strategically placed at the bottom to ensure efficient heat distribution and the clear trays allow you to keep an eye on your food as it cooks. Make 100% all-natural dehydrated foods and snacks with no added sugars, additives, or preservatives.

Provide your family with high-quality snacks and meals so they can be confident that they are getting the best. The snacks range from dry healthy fruit rolls to trail mix and granola and will keep them energized throughout the day.


  • The food dehydrator utilizes optimal temperature and horizontal airflow to ensure that heat is evenly and efficiently distributed throughout the unit
  • This allows for food to be dried and preserved in a consistent and reliable manner, with minimal risk of spoilage or decay


  • It has a manual timer

Overall, the product quality is great, as is the price point. You will feel confident with this choice. “I couldn’t be happier with my choice,” explains a buyer. “We have dehydrated kiwi, mango, apple, lemons, and bananas.”

While an automatic timer will be a great addition to the device, allowing users to set a specific time for the device to turn off. “Only thing missing is an automatic timer to shut it down in time,” says a buyer.

3. MOST ERGONOMIC: Ivation 10 Tray Commercial Stainless Steel Food Dehydrator Machine

The room for up to ten 15.6” x 15.6” trays in this food dehydrator allows you to preserve an abundance of your favorite snacks and ingredients. If you have particularly thick slices of food, you can easily remove one or more trays to make room for them.

This food dehydrator features a temperature range of 95ºF to 167ºF and a timer to automatically shut off the dehydrator at the designated time. The timer can be set in 30-minute increments for up to 24 hours of operation at a time, allowing you to easily set the duration of your dehydration tasks and ensure optimal results.


  • Its automatic timer and broad temperature range ensure you get the most out of your dehydrator each and every time
  • The drip tray at the bottom of the unit is also removable and is easy to clean


  • When the timer runs out of time, it makes a disturbing beeping sound

It has an impressive capacity and is incredibly easy to use and clean. The drip tray that is included is a great bonus, making it much simpler to keep the machine clean. “Really love this dehydrator,” writes a buyer. “Amazing capacity, easy to clean with the provided drip tray, consistent and accurate temperature. The noise level of the fan is great, very quiet.”

Ideally, it will be helpful to have some sort of way to adjust the volume or sound of the timer to ensure that it does not cause any unnecessary noise disturbances. “My only frustration with it is the very loud beeping noise when the timer completes,” explains a buyer. “Unable to turn off, shorten or quiet it down. Not good for batches that may finish in the middle of the night.”

4. MOST ECONOMICAL: Homdox 8 Trays Food Dehydrator Machine Fruit Roll Sheet

The 8-layer large drying space food dehydrator is an efficient and cost-effective solution for drying a large amount of food at once. It features a precise timer and temperature control, so users can easily adjust settings according to the type of food being dried.

It has an energy-saving feature, making it a great choice for those looking to save money while reducing waste.


  • It has an ample amount of space, ensuring that all items are dried to perfection, in the shortest amount of time
  • Allows you to dry out different types of food at the proper and accurate temperatures
  • The timer can be set anywhere between 1 and 72 hours in 30-minute increments


  • Cleaning can be a challenge for those with a limited amount of sink space

The Homdox dehydrator is intuitively designed and features multiple trays, allowing me to dehydrate a variety of ingredients in one go. “I really enjoy using my Homdox dehydrator,” says a buyer. “I have had great success using it. I have dehydrated fruit and veggies.”

If you are limited by the size of your sink, it is probably difficult to fully submerge the dehydrator or its parts in water, which can make it hard to clean thoroughly. “Cleaning can be problematic if you have a small sink,” explains a buyer.

Build your own or buy a premade food dehydrator?

Dehydrating food is a centuries-old practice that has been used to preserve food without the use of refrigeration. You can make your own solar food dehydrator or purchase a ready-made version. Building a food dehydrator is a cost-effective and efficient way to personalize the experience, as you can design a dehydrator that meets specific requirements. However, you can also benefit from the amazing features of food dehydrator machines.

Thanks to Permaculture for this great project!

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