The USB MeterBus Adapter (model: UMC-1) converts the MeterBus Rj-11 electrical interface to a standard USB 2.0 interface which allows communication between a PC and an applicable Morningstar charge controller or inverter. The UMC-1 MeterBus Adapter works with any Morningstar controller that only has a meterbus connection with no other communication options, such as the SunSaver MPPT, SunSaver Duo, and Suresine inverters.