The ES103 Series Battery Energy Storage Connector is specifically designed for high-voltage positive/negative connections between battery packs in energy storage systems, ensuring reliable operation of Battery Energy Storage Systems (BESS). As a representative high-performance battery connector, this product features a large 10.3mm diameter terminal, delivering exceptional current-carrying capacity: it supports multiple configurations including 250A-50mm², 280A-70mm², 330A-95mm², and 350A-120mm² to meet diverse current and wiring requirements. Structurally, this energy storage connector incorporates a secondary lock buckle mechanism, enabling quick and secure mating/unmating operations while utilizing a 4-position polarized keying system to effectively prevent mismating and significantly enhance installation reliability. The product is certified to UL 4128 and EN 61984 (TUV) international safety standards, providing safe and efficient connectivity assurance for energy storage systems.