Explore our core lineup of waterproof-certified mobile EV charging solutions engineered for outdoor, industrial, and commercial environments.
Recognized as a national-level "Key Little Giant" enterprise — specialized, refined, unique, and innovative — Shandong Longli Electronics Co., Ltd. stands at the forefront of waterproof electrical connector and mobile EV charger manufacturing in China.
The company is also honored as a provincial-level Gazelle Enterprise, a Hidden Champion, and a Manufacturing Single Champion in Shandong Province. With R&D centers operating in Linyi, Xi'an, and Jinan, Longli possesses comprehensive third-party service capabilities, including testing and inspection services, backed by CMA and CNAS certifications.
From ruggedized waterproof electrical links to intelligent mobile EV charging systems, Longli's product ecosystem addresses the most demanding industrial and commercial applications worldwide.
The convergence of electric mobility and ruggedized electrical infrastructure is reshaping industries globally. Here's what's driving the market forward.
Global EV sales surpassed 14 million units in 2023, with projections exceeding 40 million by 2030. This exponential growth is driving unprecedented demand for mobile EV chargers equipped with waterproof electrical links capable of operating in diverse outdoor and industrial environments.
Logistics fleets, construction sites, mining operations, and port facilities are rapidly integrating mobile EV charging infrastructure. These environments demand IP67-rated or higher waterproof electrical connections to ensure operational continuity under rain, dust, and mechanical stress conditions.
Next-generation mobile EV chargers are evolving beyond simple power delivery — they now integrate V2G (Vehicle-to-Grid) capabilities, real-time load balancing, and AI-driven energy management, all requiring ultra-reliable waterproof electrical link systems to maintain signal and power integrity.
Regulatory bodies across Europe, North America, and Asia are tightening standards for EV charging connectors. IEC 62196, GB/T 20234, and SAE J1772 compliance, combined with IP68 waterproofing requirements, are becoming baseline specifications for any commercial deployment.
DC fast chargers delivering 120kW to 350kW are entering mainstream deployment. At these power levels, waterproof electrical links must handle extreme thermal loads while maintaining contact resistance below 0.5mΩ — a challenge that separates engineering leaders from commodity suppliers.
Military-grade connector technologies — proven in aerospace, naval, and defense applications — are being adapted for civilian EV charging infrastructure, bringing unprecedented reliability to mobile EV charger waterproof electrical links in commercial and industrial settings.
Mobile EV chargers with waterproof electrical links are enabling transformative use cases across industries. Here are the most critical deployment environments.
Street-level and parking facility EV chargers face continuous exposure to rain, humidity, UV radiation, and temperature extremes. Waterproof electrical links rated IP65 or above ensure uninterrupted service, reduce maintenance costs, and extend equipment lifespan beyond 10 years in harsh outdoor conditions.
Electric bus depots, delivery van yards, and taxi fleets require high-density mobile charging solutions. Waterproof multi-connector hubs allow simultaneous charging of dozens of vehicles while withstanding washdown procedures, fuel spills, and mechanical impact common in fleet maintenance environments.
Heavy electric machinery — excavators, haul trucks, and drilling rigs — operating in mines and construction sites demand rugged mobile EV chargers. IP68-rated waterproof electrical links survive submersion, vibration, and abrasive dust, enabling 24/7 operations without connector failure.
Electric ferries, harbor tugs, and port equipment require shore power connections that withstand saltwater spray, tidal immersion, and corrosive marine atmospheres. Specialized waterproof EV charging links with stainless steel housings and double-sealed contacts are essential for safe, reliable port electrification.
Electric ambulances, fire trucks, and military support vehicles need mobile chargers deployable in any weather condition. Waterproof electrical links with quick-connect mechanisms allow rapid field deployment, ensuring emergency fleets maintain operational readiness even in flood, storm, or combat scenarios.
Electric tractors, autonomous farming robots, and rural EV fleets operate far from protected facilities. Portable mobile EV chargers with waterproof electrical links enable on-field charging, tolerating mud, irrigation water, and temperature swings from -40°C to +85°C across agricultural seasons.
Home EV chargers installed outdoors — on driveways, carports, and garden walls — must withstand years of weather exposure. Waterproof 7kW AC chargers with sealed cable management systems protect electrical links from moisture ingress, ensuring safe, code-compliant residential charging installations.
120kW+ DC fast chargers deployed along motorways experience extreme usage cycles — thousands of connector insertions per year. Waterproof electrical links with gold-plated contacts, spring-loaded sealing mechanisms, and reinforced cable strain relief maintain reliable performance across the full service life of the infrastructure.
What makes a truly reliable waterproof electrical link for mobile EV chargers? These are the critical engineering pillars.
Multi-stage silicone sealing systems prevent water and dust ingress under full immersion conditions, meeting IEC 60529 international protection standards for outdoor and marine EV charging applications.
Precision-engineered contacts in copper alloy with nickel or gold plating, combined with glass-fiber-reinforced polymer housings, deliver exceptional corrosion resistance in salt spray, chemical, and high-humidity environments.
Engineered to perform from -40°C to +105°C, these waterproof electrical links maintain stable contact resistance and insulation integrity across arctic winters and desert summers without performance degradation.
Rated for 10,000+ mating cycles with consistent electrical performance, ensuring mobile EV charger connectors withstand the demanding daily usage of commercial fleet and public charging operations throughout their service life.
As electric vehicle infrastructure expands into outdoor, industrial, marine, and extreme-environment applications, the integrity of every electrical connection becomes the single most important factor determining system safety, reliability, and total cost of ownership. A compromised electrical link doesn't just cause downtime — it creates fire hazards, data loss, and safety risks for users and operators alike. Investing in properly certified, rigorously tested waterproof electrical links is not optional — it is the foundation of any serious mobile EV charging deployment strategy.
Powering mobile EV charger and waterproof connector solutions at industrial scale
Decades of R&D investment powering the next generation of waterproof EV charging technology
The company has undertaken more than 60 research projects, including the Torch Program of the Ministry of Science and Technology, provincial major science and technology projects, and provincial key R&D programs. It has received 25 scientific and technological awards, including provincial science and technology awards and provincial SME technological progress awards.
Over 20 achievements have passed provincial appraisals, with two reaching international advanced levels and twelve achieving domestic leading levels — a testament to the engineering excellence embedded in every waterproof electrical link and mobile EV charger product.
The company primarily offers seven major categories of products, including military connectors, smart grid connectors, new energy vehicle connectors, railway locomotive connectors, mining connectors, petroleum connectors, and marine connectors — encompassing over 130 series and thousands of specifications. These products serve aviation, aerospace, military electronics, power grids, new energy, railways, telecommunications, petroleum, and coal mining sectors.
Over 20 achievements have passed provincial appraisals, with two reaching international advanced levels and twelve achieving domestic leading levels.
Awarded Science and Technology Progress, Patent Star Enterprise, and Famous Trademark. Numerous products listed in the National Torch Program, validating our leadership in waterproof EV charging connector technology.
Over 10 senior engineers and 100 R&D professionals across regional R&D centers and 12 technical departments — continuously advancing waterproof electrical link technology for mobile EV charger applications.
Certified to ISO9001:2015 & IATF16949:2016, with CQC and MA certifications. Equipped with advanced testing labs and complete quality processes ensuring every waterproof electrical link meets the highest performance standards.
Products exported to more than 20 countries, with long-term stable partnerships with military, grid, and new energy clients — proving the reliability of our mobile EV charger waterproof electrical link solutions at global scale.
From portable AC charging guns to high-power DC fast chargers — all engineered with waterproof electrical link technology for reliable performance in any environment.
