Over the weekend I installed a Multiplus 12/300/50 in my RV. It intermittently will not switch over from inverting to charger/mains power. Incoming power is good and stable, and I read 120VAC 60Hz at the line in terminals of the Multiplus. When I connect my laptop via MK3 to USB I connect fine and the Multiplus shows no incoming power available. I have updated the firmware, and verified the settings are correct (mostly factory default). I did pull the shore cord yesterday and plugged it back in and it switched over and everything was fine and I thought it was just a fluke, but today I unplugged the rig to do some other work and when I plugged it back it it would not switch off of inverter. I am assuming there is a hardware issue in the Multiplus given that I see voltage on the terminals (even doublechecked the wire placement via the markings on the board and the book), and given that it is intermittent, but if anyone has any thoughts before I go through the hassle of a RMA and pulling it I would love to hear them.
Thanks,
