Energy storage container placement requirements
IRC 2018 requirements specify that ESS must be:Listed and labeled in accordance with UL 9540Installed per manufacturer’s instructionsNot installed within a habitable space of a dwelling unitProtected from impact from vehicles with an approved barrierVentilated if battery chemistry produces flammable gas during normal operation
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6 FAQs about [Energy storage container placement requirements]
What are the IRC requirements for energy storage systems?
There are other requirements in IRC Section R328 that are not within the scope of this bulletin. 2021 IRC Section R328.2 states: “Energy storage systems (ESS) shall be listed and labeled in accordance with UL 9540.” UL 9540-16 is the product safety standard for Energy Storage Systems and Equipment referenced in Chapter 44 of the 2021 IRC.
Do energy storage systems need to be labeled?
2021 IRC Section R328.2 states: “Energy storage systems (ESS) shall be listed and labeled in accordance with UL 9540.” UL 9540-16 is the product safety standard for Energy Storage Systems and Equipment referenced in Chapter 44 of the 2021 IRC. The basic requirement for ESS marking is to be “labeled in accordance with UL 9540.”
What is required working space in and around the energy storage system?
The required working spaces in and around the energy storage system must also comply with 110.26. Working space is measured from the edge of the ESS modules, battery cabinets, racks, or trays.
Do energy storage systems need a CSR?
Until existing model codes and standards are updated or new ones developed and then adopted, one seeking to deploy energy storage technologies or needing to verify an installation’s safety may be challenged in applying current CSRs to an energy storage system (ESS).
Can pre-engineered and self-contained energy storage systems have working space?
Language found in the last paragraph at 706.10 (C) advises that pre-engineered and self-contained energy storage systems are permitted to have working space between components within the system in accordance with the manufacturer’s recommendations and listing of the system.
Are energy storage systems safe?
The emergence of energy storage systems (ESSs), due to production from alternative energies such as wind and solar installations, has driven the need for installation requirements within the National Electrical Code (NEC) for the safe installation of these energy storage systems.