<h1>UL9540A certification confirms modular battery met stringent thermal runaway safety requirements, supporting safer residential energy storage deployment.</h1> UL9540A certification at both module and system levels confirms the SBH modular battery met stringent thermal runaway propagation and related safety criteria after tests that induced progressive cell and module heating. The system showed no flying debris, explosive gas discharge, arcing, sparks, or other safety-critical incidents. Compliance rests on a multi-layer safety design including cell-level prevention, a thermal conduction heat-dissipation strategy, inter-cell heat-insulating and flame-retardant materials to inhibit propagation, and an automatic pressure relief valve to manage internal overpressure.