The IRC Tag discussed state amendments for energy storage systems (ESS) after staff noted that the 2024 IRC moved the ESS text to a renumbered section. Dustin (staff member) recommended maintaining Washington’s existing exceptions but adding the spelled-out term “energy storage systems (ESS)” to align with model-code language. Ken Brulette indicated he had submitted a petition covering the ESS sections and that the petition examines the full ESS chapter.

Why it matters: ESS provisions affect design, equipment listing, inspection and permit requirements for battery energy storage systems in homes. Petitions could change the state’s current exceptions and applicability.

Dustin told the tag that some existing state amendments are additive and recommended preserving them unless the petition proposes changes; Ken confirmed his petition covers the energy storage system sections. The tag recorded that petitions exist and that staff would note the sections for potential revision during the formal proposal and comment process. No final amendment was adopted at this meeting; the matter will be resolved through the petition process and a subsequent tag vote.

Next steps: staff will mark the ESS sections as petitioned, circulate the petition text to the tag, and bring proposed amendment language for committee consideration in the next meeting packet.