To be efficient solar panels should track the sun. This Self Powered Solar Tracking System by ahmadbakri13 of the Palestine Polytechnic University looks to work very well. There is not much details about it though. Hopefully the creator can share a bit more about the inner workings. It is probably similar to other solar tracking systems that we have featured here before though.
"2 DOF solar tracker based on micro controller and small solar cells as sensors, linear actuators and solar system of panel and battery and charge controller where the battery is the source of power of the linear jacks"
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