For safety purposes, the distance between the ESS and residential buildings must be no less than 12 m, and the distance between the ESS and densely populated buildings such as schools and hospitals must be greater than 30. . 2 NFPA 855 includes specificaons for setbacks and buffering between the energy storage system and property lines, buildings, and other potenal exposures. Our firm concurs that maintaining an aisle not only facilitates access but also. . Will the battery storage system be sited indoors or outdoors? • Depending on the size of the battery and needs of the site, it is important to determine early on if the battery will be sited in the facility or outside of it. Set up a maintenance aisle around or on one side of the ESS. The net width of the aisle should be no less than 1.
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