Fantastic research and write-up, arber333!This be the cheapest nd most elegant option. Command is via CAN bus and 12V are there to supply logic. I find it works even upt o 400Vdc.
I have ordered a coolant heater from Mitsubishi Outlander car. It comes with similar cable than Charger/DCDC. In fact it is connected directly into rear inverter casing and permanently connected to…leafdriveblog.wordpress.com
I even have AC compressor here
While researching Outlander PHEV heater and AC compressor system i found out this system is run solely via CAN bus. Once you provide 12V Heater and AC compressor start to spew out its CAN telegrams…leafdriveblog.wordpress.com