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Welcome to the Open Solar Project FreeTheSun!
A solar charge controller. Designed to work with a cheap off-the-shelf power supply + a cheap WiFi microcontroller.
- Costs less than $40 in total parts
- Works with 12 - 82VDC Solar Panels, (enabling big and efficient strings of panels!)
- Works with 3 - 60VDC batteries. Directly charge your high-voltage eBike batteries!
- Is open source, modify it as you wish!
- Connects to your MQTT smart home
- Lets you own your own data
- Gives you graphs and charts about your system from anywhere
It's a MPPT, Maximum Power Point Tracking solar controller which means you get many times the energy from your panel than if you connected it directly. (needs citation & real statistic 😅)
Head over to the parts list and build steps page!
Here's a page on the story of this project and the reason for its being