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Energy Storage Systems at Cell Sites Page 1 of 4 Version: 1.1 <br />T-Mobile Internal Revision Date: 06/2025 <br />Energy Storage Systems at Cell Sites <br />lithium-ion batteries. <br />Traditional lead-acid batteries used at cell sites and switches are exempted by code from the more stringent <br />-ion. <br />the installation of ESS. T reference <br />Chapter 1207. NFPA and IFC codes are updated every three years and implementation throughout the <br />country will depend on what version of the code has been adopted by the local jurisdiction . <br />search on the UpCodes <br />Adoptions by Publisher | UpCodes or contact the jurisdiction directly. <br />jurisdiction (AHJ). <br />Regulation Thresholds <br />Lithium-ion battery plants regulated by and IFC 1207. <br />General Requirements for ESS <br />Meet: - NFPA 69- <br />the UL listing. <br />ESS shall be segregated into groups not exceeding 50 kWh each. Each additional grouping shall be <br />. Larger battery plant size and reduced separation distances may be approved by <br />Readily available means of battery plant disconnection . <br />10-foot set back from the following <br />: <br />o Buildings <br />o Public ways <br />o Lot lines <br />o Stored combustible materials <br />o <br />Remove all individual tree or shrub is allowed