. It is possible to turn on inverter in GEN 3 system? I mean car is off, lock. In the cold morning I start up webasto remotely via GSM relay module. Problem is: webasto drain the 12V bat plus AC ventilation is turn on whit webasto. It is work two times without external charging 12v bat and bat dies. My theory is simply
. +12V signal from GSM module or webasto is turning on inverter, specifically DC-DC inverter to drain electric from big battery.What is the right way to do this without heavy modified PCB or disassembly hole inverter.
THX for help.