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Using the presents of the sky...

Build your own Solar-Dryer
Plans and Electronic Controller

Solar Dryer

- Up to 50% of the fruits and vegetable rotten in the tropical countries

- During the harvest the high quantity of food can not be sold!

- Drying in the direct sun has the risk of damaging the complete harvest by rainfall

- By Solar-drying the farmer can have more income and for a longer time


en Espagnol?


Trke dil





Such a dryer can be built in one day for less than 70$! And you really can make money with it by selling the good quality Product!

Benefits of solar drying:

  • Dried foods are tasty, nutritious, the nutritional value and flavor of food is only minimally affected by drying
  • Dried foods are high in fiber and carbohydrates and low in fat, making them healthy food choices
  • Vitamin A is retained during drying
  • Storage space is minimal, easy-to-store
  • Transportation costs are reduced; dried Products weigh only about 1/6 of the fresh food product
  • The energy input is less than what is needed to freeze or can
  • easy-to-prepare; solar food drying is a very simple skill
  • protection of the drying products from contamination by animals or insects
  • protection of rain
  • Protection of pollution by dust etc.
  • reduction of drying time (reduces changes through spoilage)
  • longer storage of dried products (because of more complete drying)
  • good product-quality
  • can open new markets and income and is a good start-up technology
  • You can have up to 50% more productivity in agriculture

  • more expensive than with direct sun drying (Solar dryer costs about 100 $)
  • if you have huge quantities to dry you need big dryers
  • Can be used for:

- fruits (apples, apricots, grapes, pineapples and banana taste great when dried, melon, plums,
             beets, mangoes, dates, figs)

- vegetables (cabbage, broccoli, peppers, herbs, onions, squash, tomatoes, asparagus,
             celery, potatoes, peas, carrots, peppers, cassava, yams, red cedar, mahogany)
- corn, maize, rise, cassava, cocoa

- fish, meat, mushrooms

- spices (dried chili peppers, garlic)

- medical plants

- tea, coffee, cacao, tobacco, cashew and macadamia, milk, hay, copra (kernel of the coconut)

- but also clothing, wool, kindling and also for treating timber

for coffee:
Conventional coffee dryers consume large amounts of wood and electricity to dry the beans after the washing process. An estimated 16,000 acres of forest are destroyed to supply the firewood used to dry the coffee production each harvest.

The solar drying process gives small growers the capacity to dry their coffee beans themselves, which adds value to the product since dry beans are stable and much more valuable than beans that must be sold wet

more Information and Downloads


Information and Hints about making your own Solar Dryer

Part-List for to build your own Solar Dryer and calculation for Resizing

Information about processing the food

More good information about drying and marketing

Frequently asked questions           Newsletter about changes in the documents

Power-Point Presentation about Solar Dryer

One good example: Solar food tunnel dryer, good hints and how to build it.

Another examle in (German language)

This Dryer we made in Ecuador in one day and for less than 70 $!

Big Size Dryer, how to build ;   another good plan

The Big Solar Dryer Type Hohenheim, construction plans; More on

More interesting Links

very good Information-sheet about Solar drying:

good Links for many Solar-Topics:

good Report of Drying Food by Barbara Kerr:

Energy Efficient Food Preservation:

Construction and Use of a Simple Solar Drier to Preserve:

Solar drying of fruit and vegetables:
Food Drying by Marcella Shaffer

Building a Big-Size Solar-Dryer in Ghana

very good documentation about Elnatan, a non-profit company in South Africa


with that Solar panel (7-10 Watt) a easy controlling of the fan is possible
Here there is a another solution