UL 9540, the Standard for Energy Storage Systems and Equipment, covers electrical, electrochemical, mechanical and other types of energy storage technologies for systems intended to supply electrical energy. This will change with the 2027 IFC, which will follow th. age systems for uninterruptible power supplies and other battery backup systems. There are several ESS techno e are additional Codes and Standards cited to cover those specific technologies. Whether you are an engineer, AHJ, facility manager, or project developer, TERP consulting's BESS expert Joseph Chacon, PE, will outline the key codes and standards for.