Magnum Energy Remote LCD display used for Magnum MS Series Inverters with 50 foot cable

The ME-ARC is simple to use, yet allows full set-up of all the standard and advanced features available in Magnum inverters. The ME-ARC also has the option of controlling the advanced features of the ME-AGS-N Automatic Gen Start and the ME-BMK Battery Monitor Kit using a network connection to the inverter. This remote has convenient finger-tip operation, including the new one-knob programming

What's the main difference between the ME-RC50 and the ME-ARC50?  

ME-ARC50 = shunt based auto gen start options, better meter screens, ability to program favourites buttons, ability to lock end user out of particular screens.

Magnum ME-ARC50 Owners Manual