Which section of the International Residential Code (IRC) covers energy storage systems (ESS) and what are the specific requirements? 

The International Residential Code (IRC) serves as a complete, comprehensive code regulating the construction of single-family houses, two-family houses (duplexes), and buildings consisting of three or more townhouse units. All buildings within the scope of the IRC are limited to three stories above grade plane. Section R328 of the IRC covers ESS, specifically the requirements focused on product safety standard listing, code-required marking, and clarifying allowable locations.

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The following informational bulletin developed by the Sustainable Energy Action Committee (SEAC) provides a quick reference on these important requirements.