I just made this 3.2A 1-4 Cell MPPT Solar Charging Breakout board for some other stuff I’m working on.
It’s the LTC4162 3.2A MPPT Solar Charge Controller for 1-4 cell battery packs, that has a 35v max input voltage.
LTC 4367 Input Protection that prevents reverse polarity connections, Input over 35v and any negative voltage down to -40v, it also blocks 50-60 AC input.
It has full telemetry I2C output and input. You can set the max current and minimum input voltage or just let MPPT run.
It’s kinda overkill for some IOT applications but is much more advanced than what the PMIC provides you.
The PCB’s are in the mail and should arrive this week.
Board is 29 x 23mm
Let me know if your interested, no point in keeping this to myself when I know some of you guys could use something just like this.