I just talked to the tech guy at Magnum Energy, no good news. Your right their system will not work with the Xantrex Inverter. In fact, the model I have with the White Rocker Switch Remote, is stand alone. The remote panels that they make are network. So according to the tech guy, unless I replace everything including inverter, it is not possible.
. I next called Xantrex, and their remote is also network, and will not work with the Magnum Stand alone model. So I got screwed both ways. I'm not changing everything just to get a updated remote