NFPA®855Standard for theInstallation of Stationary EnergyStorage Systems2026 EditionNFPANFPA,1 Batterymarch Park,Quincy,MA 02169-7471An International Codes and Standards OrganizationNFPA codes,standards,recommended practices,and guides("NFPA Standards"),of which the documentcontained herein is one,are developed through a consensus standards development process approved by theAmerican National Standards Institute.This process brings together volunteers representing varied viewpointsand interests to achieve consensus on fire and other safety issues.While the NFPA administers the process andestablishes rules to promote fairness in the development of consensus,it does not independently test,evaluate,orverify the accuracy of any information or the soundness of any judgments contained in NFPA Standards.The NFPA disclaims liability for any personal injury.property,or other damages of any nature whatsoever.whether special,indirect,consequential or compensatory,directly or indirectly resulting from the publication,useof,or reliance on NFPA Standards.The NFPA also makes no guaranty or warranty as to the accuracy orcompleteness of any information published herein.In issuing and making NFPA Standards available,the NFPA is not undertaking to render professional or otherservices for or on behalf of any person or entity.Nor is the NFPA undertaking to perform any duty owed by anyperson or entity to someone else.Anyone using this document should rely on his or her own independentjudgment or,as appropriate,seek the advice of a competent professional in determining the exercise ofreasonable care in any given circumstances.The NFPA has no power,nor does it undertake,to police or enforce compliance with the contents of NFPAStandards.Nor does the NFPA list,certify,test,or inspect products,designs,or installations for compliance withthis document.Any certification or other statement of compliance with the requirements of this document shallnot be attributable to the NFPA and is solely the responsibility of the certifier or maker of the statement.REVISION SYMBOLS IDENTIFYING CHANGES FROM THE PREVIOUS EDITIONText revisions are shaded.AA before a section number indicates that words within that section weredeleted and aA to the left of a table or figure number indicates a revision to an existing table orfigure.When a chapter was heavily revised,the entire chapter is marked throughout with the Asymbol.Where one or more sections were deleted,a is placed between the remaining sections.Chapters,annexes,sections,figures,and tables that are new are indicated with an N.A T indicatesrevisions due to a Tentative Interim Amendment.An M indicates that section has moved from anotherlocation.Note that these indicators are a guide.Rearrangement of sections may not be captured in themarkup,but users can view complete revision details in the First and Second Draft Reports located inthe archived revision information section of each code at nfpa.org/docinfo.Any subsequent changesfrom the NFPA Technical Meeting,Tentative Interim Amendments,and Errata are also located there.REMINDER:UPDATING OF NFPA STANDARDSUsers of NFPA codes,standards,recommended practices,and guides ("NFPA Standards")should beaware that these documents may be superseded at any time by the issuance of a new edition,may beamended with the issuance of Tentative Interim Amendments (TLAs).or be corrected by Errata.It isintended that through regular revisions and amendments,participants in the NFPA standardsdevelopment process consider the then-current and available information on incidents,materials.technologies,innovations,and methods as these develop over time and that NFPA Standards reflectthis consideration.Therefore,any previous edition of this document no longer represents the currentNFPA Standard on the subject matter addressed.NFPA encourages the use of the most current editionof any NFPA Standard [as it may be amended by TIA(s)or Errata]to take advantage of currentexperience and understanding.An official NFPA Standard at any point in time consists of the currentedition of the document,including any issued TIAs and Errata then in effect.To determine whether an NFPA Standard has been amended through the issuance of TIAs orcorrected by Errata.visit the "Codes Standards"section at nfpa.org/docinfo.