In Section 15. 5 of NFPA 855, we learn that individual ESS units shall be separated from each other by a minimum of three feet unless smaller separation distances are documented to be adequate and approved by the authority having jurisdiction (AHJ) based on large-scale fire testing. . NFPA 855 sets the rules in residential settings for each energy storage unit—how many kWh you can have per unit and the spacing requirements between those units. First, let's start with the language, and then we'll explain what this means. 5 of NFPA 855, we learn that individual ESS. . How you arrange Battery Energy Storage System (BESS) units on a site can affect both the probability of fire spread and the ability to respond if an incident occurs. Large-scale fire test results are encouraging — they suggest that even tightly clustered battery containers might not propagate fire. . ts and explanatory text on energy storage systems (ESS) safety. The standard applies to all energy storage tec nologies and includes chapters for speci Chapter 9 and specific are largely harmonized with those in the NFPA 855 2023 edition. This will change with the 2027 IFC, which will follow th. . As the adoption of large-scale energy storage power stations increases, ensuring proper equipment layout and safety distances is crucial. Proper spacing prevents risks such as. . less 9540A testing allows for closer spacing. ESS location requirements are detailed for areas including garages,acce sory structures,utility closets,and outdoors. ESS installed outdoors ay not be within 3-feet of doors and stored energy of 20 kWhper NFPA Section 15. NFPA 855 clearly tells us. . Spacing requirements between batteries The following diagrams illustrate the minimum amount of space required between each IQ Battery. The minimum space for non-battery Enphase equipment is 6" around all sides. IQ Battery 3T (Encharge 3T) 1 IN 6 IN 1 IN 6 IN IQ Battery. Battery energy storage. .
