Humanitarian Solar Power

How sustainable technology is transforming life for the world's poorest people.

John Barrie has 20 years of experience bringing solar power, sustainable technology, and practical engineering solutions to rural communities in Guatemala, Nicaragua, India, Cameroon, and Malawi.

Real Results from Sustainable Technology

Two decades of field measurement across Guatemala, Nicaragua, India, Cameroon, and Malawi — measurable change in income, education, and health.

A woman reading a book to four children at a wooden table inside a dimly lit, rustic room with yellow walls and small windows.

Cleaner indoor air

Replacing candles and kerosene dramatically reduces respiratory illness.

$5

saved per week

Families save money previously spent on candles, kerosene, and disposable batteries.

3–4

more years of school

Children with solar lighting stay in school significantly longer because they can study after dark.

+$35

monthly household income

Lighting and basic technology enable home businesses and extended working hours

1,000

first days of life

Solar lighting and clean water help protect mothers and infants during the most critical years.

Sustainable Technologies Saving Lives

Over the past two decades, John has designed twelve practical sustainable technologies used by families, farmers, and health workers in rural communities worldwide.

Two women dressed in colorful traditional clothing are outdoors, smiling and working together to prepare sliced yellow and orange vegetables on a wooden tray.
A simple drawing of a heart with a thick outline on a plain background.

Solar vaccine refrigerators

Used in remote clinics, helping protect over a million lives from preventable diseases.

A simple orange heart outline on a white background.

Solar lighting systems

Replacing candles and kerosene lamps in homes without electricity.

A simple outline of a heart in orange color

Solar food dehydrators

Allow farmers to preserve crops, feed their families, and increase income.

A simple orange heart outline on a white background

Treadle irrigation pumps

Replacing candles and kerosene lamps in homes without electricity.

Two orange quotation marks.

Globally, almost one billion people still live without access to electricity.

— United Nations Development Programme

Talks by John Barrie

An older man with gray hair wearing a blue suit and light blue shirt stands at a podium with a laptop, delivering a speech or presentation to a large audience in a conference room with warm lighting.

01‍ ‍Solar Power Saves Lives

In many parts of the world, families still rely on candles and kerosene for light. This talk explores how simple solar technologies are improving health, increasing household income, and helping children stay in school.


02 Designing Technology for a Billion People

Technology is often designed for wealthy markets and stable infrastructure. This talk explores how engineers and designers can create practical technologies that work for the one billion people who still live without electricity.


03‍ ‍What Works in Humanitarian Technology

Technology is often designed for wealthy markets and stable infrastructure. This talk explores how engineers and designers can create practical technologies that work for the one billion people who still live without electricity.


John Barrie speaks at conferences, universities, and events focused on solar power, sustainable technology, engineering, and global development.

Three female students in school uniforms functioning with a science experiment involving light bulbs, wires, and a solar panel outdoors.

A pioneer in humanitarian design.

John Barrie is the founder of The Appropriate Technology Collaborative and a pioneer in humanitarian design, solar power, and sustainable technology.

For more than 20 years, he has worked with rural communities to design practical technologies that improve health, education, and economic opportunity.

His work has brought solar power, clean water, and other life-improving technologies to communities in Guatemala, Nicaragua, India, Cameroon, and Malawi.

Selected Organizations & Recognition

Many people gathered in front of a building with solar panels on the roof in a rural area, with African-style huts and acacia trees visible in the background under a blue sky with scattered clouds.

Universities

  • University of Michigan

  • Michigan State University

  • Rutgers University

  • Yale University

  • University of Papua New Guinea

  • University of San Carlos de Guatemala

  • Universidad Mesoamericana

Collaborators

  • Poder y Luz Maya

  • Engineers Without Borders

  • AEIDS (Guatemala)

  • Soluciones Energéticas Apropiadas

  • Comité Campesino del Altiplano

  • Finca la Florida

Foundations

  • Ann and Gordon Getty Foundation

  • IEEE Foundation

  • Clif Bar Foundation

  • Lindbergh Foundation

  • The Rotary Foundation

  • Project Nightfall Foundation

Recognition

  • Top 100 Sustainable Innovations — Sustainia / UN Global Compact

  • U.S. Department of Energy Solar Prize

  • Energy Globe Award, Guatemala

  • Boston Innovation Prize

Bring this story to your audience.

To inquire about speaking engagements, panel discussions, or collaborations, please get in touch.