I have a customer that wants to install a phoenix 12/1200 ve. direct inverter into his coach with a cerbo gx and gx touch 50. will the ve. direct port allow him access to turn the inverter on and off. or do i have to install a remote switch to turn it on and off from. They want the gx touch for the visibility of items to include the solar that I will be installing on there roof. Main question is just is the phoenix 12/1200 capable of communicating with the Cerbo GX and GX touch.