In order to sense the solar panel voltage a voltage divider was used to step it down, as it can be greater than the maximum voltage of 5V that the Arduino can handle and thus it can damage the board.

This is a complete re-write of the original AngeloCasi/FUGU-ARDUINO-MPPT-FIRMWARE. It is compatible with the original hardware design you can find on Instructables. The charger uses a simple CC-CV ...

Abstract: This present work addresses simulation and hardware implementation of low cost Arduino based Maximum Power Point Tracking (MPPT) that is used with simple monitoring parameters in solar array ...