STANDARDFORSAFETY
TestMethodforEvaluatingThermal Runaway FirePropagation inBattery EnergyStorageSystems
SCCFOREWORD
National Standard of Canada
A National Standard of Canada is a standard developed by a Standards Council of Canada (SCC) accreditedinformation on National Standards of Canada can be found at
SCC is a Crown corporation within the porfolio of Innovation Science and Economic Development (ISED) Canada. With the goal of enhancing Canada's economic petitiveness and social well-being SCC leads and facilitates thestandards development and identifies strategies to advance Canadian standardization efforts.
and standards development organizations. A list of SCC programs and accredited bodies is publicly available at
Energy Storage Systems ANSI/CAN/UL 9540A
Sixth Edition Dated March 13 2026
Summary of Topics
This new Sixth Edition of ANSI/CAN/UL 9450A dated March 13 2026 revised the Installation LevelTesting fo update requirements for large sea/e fire testing:
The new and revised requirements are substantially in accordance with Proposal(s) on this subject datedJune 27 2025 and November 7 2025.
All rights reserved. No part of this publication may be reproduced stored in a retrieval system orwithout prior permission of ULSE Inc. (ULSE).
ULSE provides this Standard *as is" without warranty of any kind either expressed or implied includings
In no event will ULSE be liable for any special incidental consequential indirect or similar damages inability to use this Standard even if ULSE or an authorized ULSE representative has been advised of the including loss of profits lost savings loss of data or any other damages arising out of the use of or thepossibility of such damage. In no event shall ULSE's liability for any damage ever exceed the price paid forthis Standard regardless of the form of the claim.
harmless from and against any loss expense liability damage claim or judgment (including reasonable Users of the electronic versions of UL's Standards for Safety agree to defend indemnify and hold ULSEattommey's fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchaser's puter system.
No Text on This Page
MARCH 13 2026
ANSI/CAN/UL 9540A:2026
Standard for Test Method for Evaluating Thermal Runaway Fire Propagationin Battery Energy Storage Systems
First Edition - November 2017Second Edition-January 2018 Third Edition -June 2018Fourth Edition -November 2019 Fifth Edition - March 2025
March 13 2026
This ANSI/CAN/UL Safety Standard consists of the Sixth Edition.
The most recent designation ofANSI/UL 9540A as an American Nationalnot include the Cover Page Transmittal Pages Title Page Preface or SCC Foreword.
This Standard has been designated as a National Standard of Canada (NSC) on March 13 2026.
2026 ULSE Inc. Al rights reserved.
