The USB MeterBus Adapter (model: UMC-1) converts the Morningstar MeterBus RJ-11 electrical interface to a standard USB 2.0 interface. This allows communication between a PC and Morningstar charge controllers or inverters that have a MeterBus connection,
but no serial or other communications port. This includes the Sunsaver MPPT, SunSaver DUO, and SureSine products. The UMC-1 is required for:
Programming custom charging set-points
Logging data using Morningstar’s MSView PC software
Communication with any 3rd party hardware that supports MODBUS™ communication.