Solar Fruit Dehydrators for MicroEntrepreneurs

By John Bottenberg | Acting Executive Director, ATC

“Science and everyday life cannot and should not be separated.”
— Rosalind Franklin

Dear Friend of ATC,

Thank you for supporting Solar Fruit Dehydrators for MicroEntrepreneurs. Your support is helping ATC move solar food dehydration from field-tested design into practical community use, local teaching, and future replication. In our last report, we shared that the third-generation solar dehydrators installed in Guatemala were performing well under real field conditions. Replacing acrylic with glass in the solar collector helped the units retain heat more effectively and reduced drying times by approximately 50% compared with the second-generation design.

Since then, ATC’s work has focused on execution: completing the Phase 3 drawings, evaluating build costs, and improving the design so it can be built more affordably and shared more widely. This is careful, practical work. A dehydrator design is only useful if people can build it, maintain it, teach it, and adapt it to local needs.

We are also pleased to share that the Phase 4 solar dehydrator has been built and installed at Eco Spanish School in San Juan la Laguna, Guatemala. The dehydrator is now being used in classes, giving students and community members a hands-on way to learn about solar energy, heat, airflow, food preservation, and appropriate technology. The Phase 4 unit is not only a working dehydrator; it is also a teaching tool that helps make the technology visible, understandable, and repeatable.

This work matters because food preservation can help families and producers make better use of each harvest. In rural communities, crops may be seasonal, transportation can be difficult, and market prices may fluctuate. Solar dehydrators can help reduce post-harvest loss, extend the useful life of produce, and create products that can be stored, transported, or sold beyond the harvest season. Your support helps ATC test designs in real conditions, respond to local feedback, reduce build costs, and turn successful prototypes into tools that more communities can use.

Thank you for helping transform sunlight into food preservation, practical learning, and new opportunity for rural families and microentrepreneurs in Guatemala.

With gratitude,

John Bottenberg
Acting Executive Director
The Appropriate Technology Collaborative

Links:

The Appropriate Technology Collaborative Home Page

Solar Fruit Dehydrators for MicroEntrepreneurs