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ES057S Energy Storage Battery Connector 80A-120A

ES057S Series Battery Energy Storage Connector is designed for high-voltage positive/negative connections between battery modules in energy storage systems, ensuring stable and reliable operation of Battery Energy Storage Systems (BESS). It is compatible with 100Ah and 200Ah battery cells.  

Featuring a push-to-release mechanism, this connector allows quick plug-and-play installation for enhanced efficiency. Available in 60A, 80A, and 120A current ratings, it supports wiring sizes of 10mm², 16mm², and 25mm², with a 5.7mm terminal diameter. The compact design requires only an Φ18mm panel cutout, making it ideal for high-density battery pack layouts.

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    Product specification

    Material
    Mechanical Performance
    Electrical Performance
    Environmental Performance
    General Requirements
    Housing Material PA66-GF
    Terminal Material Copper alloy,silver-plated
    Plugging Times  200 times
    Error-proofing  2 keying options, polarized to prevent reverse insertion
    Rated Current   63A-10mm²/80A-16mm²/120A-25mm²
    Rated Voltage  DC1500V
    Withstand Voltage  AC 6800V
    Insulation Resistance  ≥500MΩ
    Contact Resistance  ≤0.3mΩ
    Temperature Rise  ≤45K
    Ambient Temperature  -40℃~+125℃
    Salt Spray 96H
    Altitude 4000m
    Protection Rating  IPXXB IP67
    Flame Retardant Rating  UL94 V-0
    Certification UL 4128; EN 61984（TUV）

    Product Drawing

    socket
    socket

    Order Information

    Plug P/N

    Socket P/N

    Color

    Wire Range

    ES057S-03C25-1SYA-01

    ES057S-01M5-1SYA-01

    Black

    120A-25mm²

    ES057S-03C25-2SYB-01

    ES057S-01M5-2SYB-01

    Orange

    120A-25mm²

    ES057S-03C16-1SYA-01

    ES057S-01M5-1SYA-01

    Black

    80A-16mm²

    ES057S-03C16-2SYB-01

    ES057S-01M5-2SYB-01

    Orange

    80A-16mm²

    ES057S-03C10-1SYA-01

    ES057S-01M5-1SYA-01

    Black

     63A-10mm²

    ES057S-03C10-2SYB-01

    ES057S-01M5-2SYB-01

    Orange

     63A-10mm²
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    Product Description

    Design Advantage
    Process Advantage
    Control Advantage
    Application
    IMG_9721
    • 360° rotatable plug
      This feature is a critical design element for enhancing system longevity and reliability. The connector allows for a full 360° rotation after mating, which is far more than a simple convenience. This capability enables installers to freely adjust the cable's exit angle post-installation, guiding it into the most natural and optimal path within the often-crowded battery enclosure. By ensuring the largest possible bend radius, this rotation significantly mitigates mechanical strain, torsion, and stress on the cable and the termination points. This directly prevents premature failure caused by stress fatigue, protects cable integrity, and extends the service life of both the cable assembly and the connector itself.
    • Dual Anti-Mismating System
      Safety and error-proofing are paramount in high-voltage, high-current systems. This connector incorporates a robust two-layer protection strategy. First, a visual color-coding system using distinct black and orange housings provides immediate, intuitive identification for positive and negative poles, preventing mistakes at a glance. Second, this is reinforced by a physical polarized keying mechanism. The connector housing features a unique asymmetrical design that makes it physically impossible to mate incorrect poles together.
    IMG_9725
    IMG_9727
    • Comprehensive Safety Protection
      This connector is engineered with holistic safety as a core principle. It features a fully integrated finger-safe design that completely shrouds the live electrical contacts. This design serves a dual purpose: it effectively prevents accidental human contact with energized terminals, mitigating electrocution risk, and simultaneously blocks the ingress of foreign particles and debris (such as metal dust or tools) that could cause short circuits. This comprehensive protection is maintained throughout the connector's mating and unmating cycle, ensuring a safe operating environment for technicians.
    • Quick Installation
      Recognizing the need for efficiency in volume production, this connector is designed for rapid and tool-less installation. It incorporates an intuitive push-to-release mechanism that allows for fast, secure mating and unmating without the need for additional tools or complex procedures. This translates directly into increased production throughput, lower labor costs, and simplified maintenance operations.
    IMG_9729
    The ES057S Series Energy Storage Connector is designed for compact battery pack architectures requiring reliable inter-module connections. Supporting current ratings of 60A, 80A, and 120A, it accommodates cable sizes of 10 mm², 16 mm², and 25 mm² with a 5.7 mm diameter terminal.

    Its design focuses on high-density layouts: the connector requires only an Φ18 mm panel cutout, making it an excellent solution for compact modules and optimized battery racks. The push-to-release mechanism allows fast, tool-free installation and removal, improving service efficiency for operators and installers.

    The ES057S connector is compatible with 100Ah and 200Ah cells, providing flexibility across various module capacities. Its compact form does not compromise durability or safety—it delivers reliable connectivity in demanding environments while supporting modular scalability.

    Targeted applications include residential and commercial energy storage units, telecom backup systems, and small-to-medium BESS projects. With its small footprint, versatile current range, and efficient installation features, the ES057S offers manufacturers a practical, space-saving connector option that reduces assembly time and enhances overall system integration.

    Sanco provides one-stop manufacturing solutions, covering the entire process from product design, mold design and production, stamping and CNC machining, plating and spraying, to final assembly and inspection. Our dedicated teams in R&D (with 200 experts), production, and quality assurance ensure professional execution at every stage.

    Process Advantage

    Sanco testing center is equipped with standard test site, professional testing team, more than 100 sets of advanced testing equipment, can scientifically operate according to ISO/IEC/UL/GB/GJB and other laboratory accreditation standards, establish a sound quality management system.

    In March 2021, it was officially recognized by the China National Accreditation Service for Conformity Assessment (CNAS). It is conducive to improving its own management and technical capabilities, providing a full range of quality plans for products, and increasing customers' trust in Sanco and core market competitiveness.

    International CertificatesTest Equipments

    The ES057S quick-connect connector primarily covers residential energy storage systems, small-to-medium commercial & industrial energy storage, and telecommunications energy storage applications. It is compatible with 50-200Ah battery cells and suitable for power ranges of 5-100kW.

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    FAQ

    • Q: How many specifications do your energy storage connectors cover?

    • Q: How do I choose the right connector for my energy storage system?

    • Q: What are your competitive advantages? Why should I choose your products?

    • Q: What is the IP rating of your connectors?

    • Q: Are the connectors certified?