challenges
For Business
Who We Are
search
Get Started
I want to launch a challenge
Connect to talented problem solvers
I want to solve a challenge
Join our community to win prizes
log in
menu
log in
challenges
For Business
Who We Are
John Barrie
share
Follow
Following
Unfollow
message
John Barrie is Founder and Chief Innovation Officer of the Appropriate Technolo…
Ann Arbor, Michigan, United States
Read More
more
Entries
Following
Recent activity
Teams
About
Entries
Solar-20 Carbon Credit Platform
A Carbon Credit Platform To Finance Global Solar Installations
read more...
by
John Barrie
Solar 20 - Long Life Solar Power Systems
Solar 20 makes integrated solar home power systems where all components, including batteries, last 20 years.
read more...
by
Solar 20
Solar.20
Long life solar power for all. #SDG7, #Solar, #Humanitarian
read more...
by
John Barrie
Solar-20
A solar power system that lasts 20 years without replacing any components.
read more...
by
John Barrie
Following
Recent activity
Teams
About
