As I'm short on time, the code is based on the PhpEpsolarTracer by Luca Soltoggio. This is a great addition to the Voltronic HA Solar Monitor (if you are running this also) and using both the Epever ...

This is firmware for MCU STM32F030 (heart of EPEVER solar charge controllers). WARNING: Author does not respond for possibly destroying Your device! What works: charging 24 volts battery using MPPT ...