
Electrical energy storage (EES) systems - Part 4-3: Protection requirements of battery-based energy storage systems (BESS) according to environmental conditions
STANDARD published on 20.10.2025
Designation standards: IEC 62933-4-3-ed.1.0
Publication date standards: 20.10.2025
The number of pages: 18
Approximate weight : 54 g (0.12 lbs)
Country: International technical standard
Category: Technical standards IEC
IEC 62933-4-3:2025 applies to the effects of the environmental conditions on Battery Energy Storage Systems (BESS). This document addresses these effects and identifies causes, chain of events and final effects on the BESS. Based on those effects, preventative or mitigating measures are described. Typical environmental effects on the BESS include, but are not limited to, the effects of lightning, seismic activities, water, air, flora, fauna, and humans. The described measures focus as a guideline on the entire BESS including all power and communication connections and its Point of Connections (POCs). The scope of this document is limited to BESS specific requirements and operating conditions. Specific design or safety requirements of individual BESS subsystems are excluded from this document. LIEC 62933-4-3:2025 s’applique aux effets des conditions environnementales sur les systemes de stockage de l’energie sur batterie (BESS). Le present document examine ces effets et identifie les causes, les chaines des evenements et les effets finaux sur les BESS. Sur la base de ces effets, des mesures de prevention ou d’attenuation sont decrites. Les effets environnementaux types sur les BESS comprennent, mais sans s’y limiter, les effets de la foudre, des activites sismiques, de l’eau, de l’air, de la flore, de la faune et des etres humains. Les mesures decrites portent essentiellement sur l’ensemble des BESS, y compris toutes les connexions d’alimentation et de communication et leurs points de connexion. Le domaine d’application du present document se limite aux exigences et conditions de fonctionnement specifiques aux BESS. Les exigences specifiques en matiere de conception ou de securite des sous-systemes individuels des BESS sont exclues du present document.