Here’s an open-access graphical manual that describes how to build a biochar oven that’s heated using direct DC electricity from solar panels.
The original published version (Version 1.3, July 2025) is still linked below. The latest version - Version 1.4, September 2025 - adds some troubleshooting tips and a simple design for an emissions control system that can be added on to the oven.
Give it a try and let us know your feedback!
Previous version(s):
FYI we are offering this work open-access under Creative Commons terms:
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I've been thinking of this idea for a while and I'm glad someone got around to actually designing and building it. No reason to build a fire to get biochar when we have power sources that can do it without using all that valuable wood that could instead be biochar. This way even prevents you from using grid power so you can be out in the woods and create your biochar on site!!
Thanks for sharing!!
Josh, who needs or can afford solar?