SunSpec Specifications and Information models
SunSpec publishes free, open interoperability specifications and information models that software developers, hardware manufacturers, and integrators use to achieve plug-and-play interoperability between Distributed Energy Resource (DER) components and smart grid applications. All SunSpec specifications are free to download and use. SunSpec also supports international standard communication protocols that adhere to open principles.
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Available Specifications
Specification packets are listed by date, most recent first.
SunSpec Energy Storage Model Description
TEST status. Describes the SunSpec Modbus information models for lithium ion, flow, and lead acid batteries.
SunSpec Modbus Vendor Extensions
The SunSpec Modbus interface allows for vendor defined functionality. The following Model IDs have been reserved by the indicated manufacturer to be used for vendor extensions: - Starting ID Ending ID Vendor Description 64001 64009 Veris 64001: Veris status and...
SunSpec Communication Signal for Rapid Shutdown Test Specification
Revision: 10 Date: August 21, 2017 Defines the test requirements and procedures required to verify interface compliance with the SunSpec Communication Signal for Rapid Shutdown Specification. Download Specification...
CA Rule 21 Implementation Guide for SunSpec Modbus
TEST Status. Describes the SunSpec Modbus information models required to develop a CA Rule 21 Phase 1 and UL 1741 SA compliant communication interface.
Unlocking Grid Data Enabling Data: “Access and Transparency to Drive Innovation in the Electric Grid”
DER Information Model and UL1741 Supplement SA Interoperability Report
Revision: 1 Date: September 1, 2016 This document outlines the current state of prominent DER communication information models relative to relevant grid requirements and outlines possible updates to achieve better harmonization. The information presented is believed...
SunSpec Advanced Function Inverter Test Lab Specification
Revision: 1.0 Date: March 15, 2016 Defines an open standard for building and configuring an automated smart inverter testing laboratory using off the shelf components.
Best Practices in Photovoltaic System Operations and Maintenance 2nd Edition
Revision: 2.0 Date: December 2015This guide considers Operation and Maintenance (O&M) of photovoltaic (PV) systems with the goal of reducing the cost of O&M and increasing its effectiveness. Reported O&M costs vary widely, and a more standardized approach...
SunSpec Inverter Model Descriptions
Revision: APPROVED Date: April 6, 2015 Describes the SunSpec Modbus information models for inverter monitoring and control. Note: some newer SunSpec models are not documented here.
Best Practices in PV System Installation
Revision: 1.0 Date: March 2015The following Photovoltaics Installation Best Practices Guide is one of several work products developed by the Solar Access to Public Capital (SAPC) working group, which works to open capital market investment. SAPC membership includes...
Best Practices in PV System Operations and Maintenance Version 1.0
Revision: 1.0 Date: March 2015The following Photovoltaics (PV) Operations and Maintenance (O&M) Best Practices Guide is one of several work products developed by the Solar Access to Public Capital (SAPC) working group, which works to open capital market...
PV System Performance Assessment
Revision: 2.0 Date: June 2014Metrics and methods to assess performance of existing systems to aid bankability of PV asset class Determining and evaluating system performance based on actual weather and actual system characteristics is [et_bloom_locked...