DER - Solar

Here are the states that have adopted IEEE 1547-2018 for DER interconnection

Here are the states that have adopted IEEE 1547-2018 for DER interconnection
(Photo by Joe DelNero /NREL)

Seven states have adopted the Institute of Electrical and Electronics Engineers 1547-2018 Standard (IEEE 1547-2018) for distributed energy resource (DER) interconnection, according to data compiled by the the Interstate Renewable Energy Council (IREC).

An “Adoption Tracker,” presented in map form by IREC, offers insight into which states, utilities, and ISO/RTOs have adopted IEEE 1547-2018, a technical standard that establishes how distributed energy resources (DERs) — like solar and energy storage — can connect to the grid. In particular, it establishes interconnection requirements for smart inverters, which have “grid support” functions that IEEE says can help the grid accommodate higher levels of renewable energy.

The Adoption Tracker indicates whether a particular entity has selected an adoption date by which certified inverters (in compliance with UL 1741 SB) are required in new interconnection applications. It also compiles references from decision-making entities related to their efforts to adopt the IEEE 1547-2018 standard. The tracker also includes inverter performance criteria, if selected and made public by a particular region or state entity.

Credit: IREC

States that have adopted the standard are: Massachusetts, Maryland, Pennsylvania, Minnesota, New Mexico, California, and Oregon. Meanwhile, six states are currently in the process of adopting IEEE 1547-2018: New Jersey, Ohio, Illinois, Wisconsin, Texas, and Colorado.

Improving the California service upgrade process, a session at GridTECH Connect California, will explore streamlining the utility interconnection process and enhancing the customer experience.

Join us at GridTECH Connect California, June 24-26, 2024, in Newport Beach, CA! GridTECH Connect Forum is the interconnection event, offering electric utilities, grid operators, project developers, policymakers, solutions providers, and advocates the unique opportunity to join forces and improve the critical issue of interconnection through face-to-face collaboration.

All remaining states are designated as incomplete, unclear, or “utility-specific” in IREC’s tracker. Incomplete states have begun to align with the standard, but have not determined or publicized an adoption date. Unclear states either have not begun the adoption process, or IREC lacked the data necessary to determine their status. State regulatory commissions in “utility-specific” states have not yet performed a state-wide adoption process, but some utilities have chosen to align to the standard anyway.

The 11 “utility-specific” states are: Maine, New Hampshire, Vermont, New York, West Virginia, North Carolina, Tennessee, Indiana, Mississippi, Louisiana, and Oklahoma.

Credit: IREC

Additionally, IREC’s tracker shows which ISO/RTOs have adopted IEEE 1547-2018. PJM Interconnection and Alberta System Operator (AESO) are the only two North American entities that have completed adopting the standard. Independent Electric System Operator (IESO) and Hydro-Québec are still undergoing the adoption process. Electric Reliability Council of Texas (ERCOT)’s adoption process is incomplete. Midcontinent Independent System Operator (MISO) has utility-specific adoption. New York Independent Service Operator (NYISO), Southwest Power Pool (SPP), and California Independent Service Operator (CAISO) are in the unclear category.

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