SunSpec Modbus and Usage Profiles

SunSpec Modbus is an open communication standard that specifies common parameters and settings for monitoring and controlling Distributed Energy Resource (DER) systems.  SunSpec Modbus utilizes SunSpec Information Models and is specified in IEEE™ 1547-2018, the U.S. national standard for DER.

Features and Benefits

  • Enables multi-vendor interoperability for manufacturers of solar inverters, energy storage devices, trackers, meters, and other DER devices. 
  • Semantically identical and fully interoperable with IEEE 2030.5 and IEEE 1815 communication protocols, thus ensuring a high signal-to-noise ratio for  DER networks.  
  • Specified in IEEE 1547, the national DER standard in the U.S., as a standard communication interface option. 

Understanding SunSpec  Modbus

To understand what SunSpec Modbus is and how to use in your product interface or DER system design, follow these steps.

Technology Overview

These SunSpec Modbus Specifications and application guides should be referenced to implement a DER communication interface that complies with California Rule 21 Phase 2 and Phase 3 requirements.

Model Reference

These SunSpec Modbus Specifications and application guides should be referenced to implement a DER communication interface to support energy storage applications, including those specified by the MESA Alliance.

SunSpec Information Model Reference

Describes SunSpec Modbus data points and information models for all types of DER devices including inverters, batteries, meters, and trackers. Published in Microsoft Excel format.

Model Specification

These SunSpec Modbus Specifications and application guides should be referenced to implement a DER communication interface that complies with IEEE 1547 and the IEEE 1547.1 requirements that will be published in 2020.

SunSpec Information Model Specification

Provides an overview of SunSpec information models associated with the physical devices comprising a photovoltaic system. This document provides communication interface developers with detailed information needed to define SunSpec-compliant device interfaces....

SunSpec Modbus Use Cases

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