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Professional Series
Morningstar UMC-1 USB MeterBus Adapter
Converts RJ-11 MeterBus port to USB 2.0 interface.
Morningstar Model Number UMC-1
Connectors RJ-11, USB A
Baud Rate 9600 baud
Dimensions 2.83" x 1.37" x .87"
Weight 1.23 oz

Morningstar UMC-1 USB Meterbus Adapter

Morningstar charge controllers

Morningstar UMC-1 USB Meterbus Adapter

UMC-1 USB MeterBus Adapter

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 Windows-based computer and Morningstar charge controllers or inverters that have a MeterBus connection, but no serial or other communications port. This includes the ProStar MPPT, Sunsaver MPPT, ProStar, SunSaver DUO, and SureSine products.

The UMC-1 can be used for:

• Programming custom charging set-points
• Downloading, viewing, and logging data using Morningstar’s MSView PC software
• Uploading new firmware
• Communication with any 3rd party hardware that supports MODBUS™ communication

Establishing a communications link enables the monitoring or logging of data from the controller or inverter as well as the customizing of any user-adjustable settings. The Morningstar UMC-1 makes available a wide variety of data stored in Morningstar’s products (varies by product).

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The UMC-1 can provide data for:

• Battery Voltage (including minimum and maximum)
• Solar charge current to the battery
• Load current from the battery
• Accumulated solar and load amp hours
• Charge Stage
• Errors and alarms
• Local and battery temperature
• Data logging files

All data is transmitted in the form of MODBUS protocol. This industry standard was chosen for a high level of compatibility with a variety of equipment. Each Morningstar product has its own data specification.

UMC-1 Wiring Diagram

UMC-1 USB MeterBus adapter wiring diagram review
The UMC-1 is used for programming custom charging set-points and logging data using Morningstar’s MSView PC software. The UMC-1 is also used for communication with any 3rd party hardware that supports MODBUS communication.

UMC-1 Kit Contents

The UMC-1 is sold as a kit that includes the following:

• UMC-1 USB MeterBus Adapter
• USB A to USB B cable: 1 meter (3.3 feet)
• RJ-11 cable with connectors: 1 meter (3.3 feet)

Morningstar UMC-1 Warranty

All of Morningstar’s charge controller components are warranted to be free from defects in material and workmanship for a period of FIVE (5) years from the date of shipment to the original end user. Morningstar will, at its option, repair or replace any such defective products.


Contact us toll-free: (877) 297-0014

Read more about Morningstar charge controllers.

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Contact us toll-free: (877) 297-0014 for expert assistance and wholesale prices for Morningstar charge controller accessories like the USB MeterBus Adapter UMC-1.