2026
Standard for the Installation of Stationary Energy Storage Systems
NFPA?855
Standard for the Installation of Stationary Energy Storage Systems
2026Edition
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NFPA° 855
Standard for the
Installation of Stationary Energy Storage Systems
2026 Edition
This eit PA 5 St fr Sttory ESstsprepared by the Technical Commitee on Energy Storage Systems and acted on by the NFPA membership during the 2025 NFPA Technical Meeting held June 19-20 It was issued by theStandards Council on August 20 2025 with an effective date of Scptember 9 2025 and supersedes the previous edition.
This edition of NFPA 855 was approved as an American National Standard on September 9 2025.
Origin and Development of NFPA 855
Installation o Sletionary Enrg Storage Systems was approved by the NFPA Standards Council in April Theergy raetmprjct hat ld to thfititn oNPA55Srf of 2016 after which a call for members was posted. The original request was subitted by an individual on behalf of the Califoia Energy Storage Alliance to adress gaps in regulationFodioAt fttmyar Stndar ounilapntd hit NPATechl idlentified in workshops held by the US Department of Energy and the Fire Protetion ResearchCommittee onEnergStrage SystmsTheinitial draf was deeloped er the couse of three meetings by the tehnical mitte and was released to the pblic in 2017 Oer the ext 2 years improvements to the standard. the technical mitce met several times to review fcedback from the public and to make
The first edlition was issued by the Standards Council on August 5 2019.
storageAlicationFPA55tanESSistallaionislf tthmndatryrolutary The 2023diionldacope thtollstoragesnd ithitywere incrorated troughout the standard to addres concems if NFPA 855is adoped fortility adoption of the standard. Exemptions specific to installations under the exclusive control of utilitiesuse.
suppreilsionrostntlanaset thmalawee In response to intematonal incidents of ESSfires reqirements fr fire dtection anorrevied. Te requiremens fo fire and exploion testing (omall lagescal fire testing) wee clarified.
reorganized in Chapter 9. Chapter 13 was added to address flywheel ESS. Requirements from Chapters 4 and 10 specificto lecrochemical ESS were consolidated and
Information as added in Annex B to provide guidance on the hazards associated with additionalbattry tpes. Aex G was aded as a guide for supprein and safety of lithim-ion batty ESS.
The 2026 edition has been revised to further consolidate general requirements applicable to allchapters. ESS into Chapter 4 while requirements for individual ESS technologies are contained in specific
Additional battery tes he een added to NFPA 855.Various bttry exclusons hase beenrefined for all tpes of lea-acid aqeous nickel-based a aquous metalair baeries.
Chapter 9 on electrochemical ESS has been revised and reorganized for readability and clarity.Exclusions for some stored batteries have been added to Chapter 14.
charging sstems that he cergy orage Chapter 16 fr flo battries and Chapter 17 for ESSs n New requirements in the 2026 edition include those for an emergency response plan EVbarges.
