Unfortunately, Daxtromn no longer sells a separate control board. I wonder which signal/voltage level at the input of the control board disconnects the MPPT charging, I measured the pins during operation and the voltage changes on two of them as the power of the MPPT regulator increases. The load on the converter causes the MPPT controller to work continuously, I have a Jtag cable and several programmers... The inverter and its basic function, the MPPT charger, does not work properly.