MESA Standards

June 15, 2018

MESA is currently developing two specifications: MESA-ESS and MESA-Device/SunSpec Energy Storage Model. MESA-ESS addresses communication between a utility’s control system and energy storage systems (ESS). MESA-Device specifies standardized communications between components within the ESS.

MESA Specifications


MESA-ESS (Energy Storage System)

MESA-ESS provides a standard framework for utility-scale energy storage system (ESS) data exchanges. The draft specification addresses ESS configuration management, ESS operational states, and the applicable ESS functions from the IEEE 1815 (DNP3) profile for advanced DER functions.

MESA launched a technical working group in March 2015 to develop the MESA-ESS Specification based on work by the Electric Power Research Institute (EPRI) and the DNP User Group. A draft was released for public review and testing in November 2016.

UPDATE: As of June 2018, the MESA-ESS Workgroup has reconvened to update the specification to ensure it incorporates these new grid code requirements, and secondly to discuss additional requirements that are raised by MESA members as we continue to try to model new ESS capabilities that could be used to meet any additional technical functions as the DER market starts to mature. Please contact brietta (at) if you would like additional information or to participate in the workgroup.


MESA-Device Specifications/SunSpec Energy Storage Model consists of three separate specifications for inverters, meters, and storage which address how energy storage components within an energy storage system communicate with each other and other operational components. MESA-Device Specifications are built on the Modbus protocol.

The Energy Storage Workgroup, run by SunSpec Alliance with contributions from MESA members, worked through 2015 and 2016 to produce an updated draft specification for MESA-Device/SunSpec Energy Storage Specification (Draft 4). The specification was released in DRAFT status for feedback and testing in July 2016.