I'm using the stock contactors and inverter, and when I turn them off, the voltage to the inverter drops swiftly. I assume it's something internal, because I didn't do anything to make this happen.
Permanently wired across the DC? So say 400VDC gives 2.6W parasitic loss instead of a NC contactor in series that has a 5W coil to open it when the inverter is on. Makes sense.15w 61k ohm resistor bridging the dc inputs