MultiPlus remote on/off switch

I have a remote switch to turn the MultiPlus from Invertor only to charger only. I want to be able to remotely turn the unit off. If I use a switch with a center off, the off position turns the unit off but it cycles on. I assume it turns on then checks the switch position then turns off again. Is there any way to have the remote switch turn off the MultiPlus then turn on either charger only or Invertor only without having the unit cycle on and off in the disconnected position. I don’t want to have to access the MultiPlus to use the switch on the front of the unit to turn it off.