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Precision-engineered high-voltage junction boxes designed specifically for commercial and industrial EV charging infrastructure.
A High-Voltage (HV) Junction Box is a mission-critical electrical distribution component installed within EV charging stations to manage, protect, and route high-voltage power between the grid supply, power modules, and charging outlets. As EV charging infrastructure scales from single-unit installations to mega charging hubs handling hundreds of simultaneous sessions, the HV Junction Box has evolved from a passive enclosure into an intelligent, safety-certified power distribution node.
The global EV charging infrastructure market is projected to exceed USD 280 billion by 2032, driven by government mandates, automaker electrification commitments, and surging consumer EV adoption. Within this ecosystem, the HV Junction Box sits at the heart of every charging station — from residential Level 2 chargers to 350kW ultra-fast DC public stations.
Fully sealed enclosures rated for dust-tight and high-pressure water immersion, enabling reliable outdoor installation across all climate zones from arctic cold to desert heat.
Supports next-generation ultra-fast charging architectures operating at 800V and 1000V+ vehicle platforms, future-proofing your charging infrastructure investment.
Integrated manual service disconnects (MSD), fuse holders, surge protection devices (SPD), and arc fault detection circuits ensure personnel and equipment safety at all times.
Plug-and-play busbar modules and configurable circuit layouts allow rapid adaptation for 50kW to 360kW+ charging power levels without full redesign cycles.
Precision-engineered copper busbars with optimized cross-sections minimize resistive losses. Optional active cooling integration supports continuous high-current operation in high-ambient environments.
Embedded sensor interfaces support real-time temperature, current, and insulation resistance monitoring, enabling predictive maintenance and remote diagnostics via IoT platforms.
By 2030, the International Energy Agency (IEA) estimates that over 40 million public charging points will need to be installed globally to support projected EV fleets. This unprecedented infrastructure buildout is creating massive demand for high-quality, certified HV Junction Boxes at every installation level.
Commercial charging operators — including BP Pulse, ChargePoint, Ionity, and EVGO — are deploying charging hubs with 20 to 100+ simultaneous charging points, each requiring robust high-voltage power distribution. Industrial logistics operators are converting entire truck fleets to battery-electric, demanding megawatt-scale depot charging systems where HV Junction Boxes manage power flows exceeding 1MW per installation.
The HV Junction Box is no longer a passive component. The integration of digital intelligence, advanced materials, and modular architectures is reshaping what these devices can do:
Sanco's R&D team of 200+ engineers is actively developing next-generation HV Junction Box solutions incorporating these technologies, with over 200 core patents protecting our innovations in high-voltage connection systems.
From urban fast-charge corridors to remote industrial depots, Sanco HV Junction Boxes deliver reliable high-voltage power distribution across every deployment environment.
High-density city charging stations serving passenger EVs require compact, multi-outlet HV Junction Boxes managing power distribution from a single 500kW+ transformer to 8–16 individual charging points with independent circuit protection.
Heavy-duty electric truck charging depots operating at 350kW–1MW per vehicle demand industrial-grade HV Junction Boxes with enhanced thermal management, robust mechanical connections, and 24/7 continuous operation capability.
Shopping centers, hotels, and airports deploying Level 2 and DC fast chargers require weatherproof HV Junction Boxes with aesthetic enclosure options and simplified installation for non-specialist facility teams.
Battery Energy Storage System (BESS) integrated charging stations — combining solar PV, grid power, and battery storage — require bidirectional HV Junction Boxes capable of managing complex multi-source power flows safely.
Electric bus fleets charging overnight at transit depots need high-reliability HV Junction Boxes with remote monitoring integration, ensuring every vehicle departs at full charge without manual intervention.
Motorway charging stations experience extreme temperature ranges, high humidity, and continuous high-power operation. Sanco's IP67-rated HV Junction Boxes with -40°C to +85°C operating range ensure uninterrupted service.
With 2,700 employees, 4 factories, and 200+ R&D engineers, Sanco is a national high-tech enterprise that integrates R&D design, manufacturing, sales service, and after-sales support for connectivity system products, dedicated to becoming a leader in the field of connection technologies and products.
We specialize in the R&D and manufacturing of electrical connection systems for automotive, rail transit, industrial, communication, and energy storage applications, including: high-voltage connectors, MSDs, laminated busbars, injection-molded busbars, signal connectors, rectangular and circular connectors, CCS, and various precision components.
Our HV Junction Box product line for EV charging stations represents the convergence of 25+ years of high-voltage engineering expertise with cutting-edge smart manufacturing capabilities — delivering solutions trusted by global Tier 1 OEMs and charging infrastructure operators across 25 countries.
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We specialize in the development and manufacture of electrical connection systems for automotive, rail transportation, industry, communications, and energy storage.
Our streamlined customization process takes your HV Junction Box requirements from concept to certified mass production with full engineering support at every stage.
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Requirement Alignment
Drawing Release
Submit Quotation
Prototype Production
Sample Approval Documentation
Mass Production
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With four production bases spanning 270,000m² and equipped with world-class precision machining systems, we've established industry-leading manufacturing capabilities that form the solid foundation for exceptional HV Junction Box product quality.
Product Design
Tooling
Cold Heading
Extruded Copper Busbar
Flexible Busbar
Various Welding
Coating & Electroplating
Laminated Busbar
Stamping
CNC
Injection Molded
Automatic Assembly
Explore our comprehensive range of high-voltage junction box solutions engineered for every EV charging deployment scenario.
Partner with Sanco for certified, scalable, and intelligent HV Junction Box solutions. Our engineering team is ready to support your next EV charging project — from initial specification to mass production.
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