Solar power is not trivial, especially if it needs to be reliable and have a long lifetime for outdoor deployment such as IoT sensor nodes. This project is an effort to create a complete, easy to use solar power system that provides the following features:
– LiFePO4 battery for high charge cycle count, high temperature performance and 3.2V output voltage (compatible with most chips used in IoT).
– Switch mode MPPT charge controller for high efficiency, 5-30V solar input range.
– Charge and output current up to 2A (depending on the battery capacity).
– Automatic heater control to bring the battery up to temperature before charging, ensuring maximum battery life.
– Low voltage cutoff disconnects the load from the battery when the battery voltage becomes too low, again ensuring maximum battery life.
– User can set MPPT voltage, charge current and connect an external thermistor if desired.
LiFePO4wered/Solar1 – Solar power supply for IoT devices – [Link]
Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)
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