High-Current Solutions for Battery Systems & Power Distribution
Energy Storage Connectors
- Supply 50A-350A current rating
- Used for power, signal, and data connections
- Ensures safe and reliable connections
- UL4128/TUV/CE/UL Certified
- Fast delivery, sample order 1-3 days, bulk orders, 7-9 days.
- Professional R&D team, support customization, ODM, OEM.
Energy Storage Connector Supplier & Manufacturer
AGX is a professional energy storage connector manufacturer in China, specializing in high-voltage DC connectors for battery energy storage systems (BESS), solar installations, and EV charging infrastructure. Our E-Series connectors feature rated currents from 50A to 350A with 1500V DC voltage rating, engineered with silver/tin-plated copper contacts and IP67 waterproof protection. All products comply with GB/T 33765 and IEC 62852 standards with TÜV certification, ensuring reliable performance in demanding renewable energy applications.
We offer comprehensive OEM/ODM services with flexible MOQ options and factory-direct pricing. Whether you need standard configurations or custom solutions, our engineering team provides full technical support from design to production. AGX welcomes partnerships with wholesalers, distributors, system integrators, and renewable energy contractors worldwide. Contact us for bulk pricing and tailored energy storage connector solutions.
What Are Energy Storage Connectors?
Energy storage connectors are specialized electrical components designed to safely connect battery modules, inverters, and power distribution systems in BESS (Battery Energy Storage Systems).
These high-voltage DC connectors handle currents from 50A to 350A at voltages up to 1500V DC, enabling reliable power transmission between battery packs and system components. Built with silver/tin-plated copper contacts and IP67 waterproof protection, they ensure minimal energy loss (contact resistance ≤1mΩ) and consistent performance in extreme temperatures (-40°C to +125°C). Professional-grade connectors feature UL94 V-0 fire rating, halogen-free materials, and tool-free crimping installation for quick system assembly and maintenance.
Why Choose Energy Storage Connector ?
High Voltage & High Current Capacity
Rated for 1500V DC and currents up to 450A, designed for large-scale battery energy storage systems (BESS) and utility-grade installations.
Low Contact Resistance (≤1mΩ)
Silver/tin-plated copper contacts minimize energy loss during transmission, ensuring efficient power flow and reduced heat generation in high-power applications.
Flexible Installation Options
Dual mounting configurations—front-lock for easy maintenance access, rear-lock for superior IP68 waterproof protection in extreme outdoor environments.
Fool-Proof Design
90° twisted mating face prevents accidental cross-connection with solar PV connectors. Color-coded seals enable quick identification and proper system assembly.
Tool-Free Crimping Connection
Push-to-connect design with audible “CLICK” confirmation enables fast, secure installation without specialized tools, reducing labor costs and installation time.
International Compliance & Safety
Compliant with GB/T 33765, IEC 62852, TÜV, and UL standards. UL94 V-0 fire rating, halogen-free materials, and 500+ mating cycles ensure long-term reliability.
Energy storage Connectors
in Various Applications
Our waterproof male and female connectors are trusted in diverse demanding applications:
Commercial & Industrial Solar System
Connect battery systems (50kWh-10MWh) in factories, warehouses, and commercial buildings for peak shaving, demand charge reduction, and backup power with reliable high-current connections.
Energy Storage Systems (ESS)
Link containerized battery systems and grid-scale storage units for frequency regulation and renewable integration. Handle extreme currents (200A-350A) with IP67 protection for outdoor utility installations.
Floating Solar Systems
Provide waterproof connections for solar+storage on reservoirs and coastal waters. Ensure corrosion-resistant performance with IP67 sealing and marine-grade materials for high humidity and saltwater exposure.
Repowering & Retrofit Projects
Enable battery integration in existing solar installations with modular quick-connect designs. Allow easy system upgrades, capacity expansion, and maintenance without major infrastructure changes.
Rooftop Solar+Storage Systems
Connect residential and commercial rooftop batteries (5-50kWh) to solar inverters for self-consumption and backup power. Deliver compact, UV-resistant connectors for long-term outdoor rooftop exposure.
Solar Power Plants
Integrate utility-scale battery storage (10MWh-100MWh+) with large solar farms for energy dispatch and grid compliance. Withstand desert temperature extremes (-40°C to +125°C), UV radiation, and dust exposure.
Energy Storage Connector
Wholesale by Types
| Technical Data | ||||
|---|---|---|---|---|
| Parameter | E50 | E70 | E100 | E120 |
| Plug type | E50 | E70 | E100 | E120 |
| Number of connections | 1 | 1 | 1 | 1 |
| Plug in force | 80N MAX | 80N MAX | 80N MAX | 80N MAX |
| Plug out force | <80N | <80N | <80N | <80N |
| Rated voltage | 1500V DC | 1500V DC | 1500V DC | 1500V DC |
| Rated current | 50A | 70A | 100A | 120A |
| Contact resistance | ≤1mΩ | ≤1mΩ | ≤1mΩ | ≤1mΩ |
| Insulation resistance | 500V, ≥500MΩ | 500V, ≥500MΩ | 500V, ≥500MΩ | 500V, ≥500MΩ |
| Colour | Orange/black/red | Orange/black/red | Orange/black/red | Orange/black/red |
| Contact material | Silver/tin plated copper | Silver/tin plated copper | Silver/tin plated copper | Silver/tin plated copper |
| Insulation material | PA66+GF | PA66+GF | PA66+GF | PA66+GF |
| Water seal material | Silicone (black) | Silicone (blue) | Silicone (black) | Silicone (blue) |
| O-ring material | Silicone (red) | Silicone (red) | Silicone (red) | Silicone (red) |
| Mating cycle | 500 Mating cycles | 500 Mating cycles | 500 Mating cycles | 500 Mating cycles |
| Outer cable diameter | 5.2-6.3mm | 6.2-7.3mm | 5.5-8.5mm | 8.5-10.5mm |
| Wire section | 10AWG (6mm²) | 8AWG (10mm²) | 6AWG (16mm²) | 4AWG (25mm²) |
| Cable stripping length | 10-12mm | 10-12mm | 12-14mm | 12-14mm |
| Connection mode | Crimping | Crimping | Crimping | Crimping |
| IP Rating (opposite insertion) | IP67 | IP67 | IP67 | IP67 |
| Operating temperature | -40°C~+125°C | -40°C~+125°C | -40°C~+125°C | -40°C~+125°C |
| Ambient temperature (storage/transportation) | -40°C~+80°C | -40°C~+80°C | -40°C~+80°C | -40°C~+80°C |
| Halogen free | Compliant | Compliant | Compliant | Compliant |
| Fire rating | UL94 V-0 | UL94 V-0 | UL94 V-0 | UL94 V-0 |
E-Series Energy Storage Connectors
| Product Model | Rated Current | Rated Voltage | Wire Section | Outer Cable Diameter | Applications |
|---|---|---|---|---|---|
| E50 | 50A | 1500V DC | 10AWG (6mm?) | 5.2-6.3mm | Residential solar+storage, small BESS |
| E70 | 70A | 1500V DC | 8AWG (10mm?) | 6.2-7.3mm | Commercial rooftop systems |
| E100 | 100A | 1500V DC | 6AWG (16mm?) | 5.5-8.5mm | Industrial BESS, energy storage containers |
| E120 | 120A | 1500V DC | 4AWG (25mm?) | 8.5-10.5mm | Large commercial installations |
| E150 | 150A | 1500V DC | Custom | Custom | Utility-scale projects |
| E200 | 200A | 1500V DC | Custom | Custom | Grid storage, solar power plants |
| E250 | 250A | 1500V DC | Custom | Custom | Utility-scale BESS |
| E300 | 300A | 1500V DC | Custom | Custom | Large solar+storage farms |
| E350 | 350A | 1500V DC | Custom | Custom | Mega-scale energy storage projects |
E-Series Energy Storage Connectors
| Product Model | Rated Current | Rated Voltage | Wire Section | Outer Cable Diameter | Applications |
|---|---|---|---|---|---|
| E50 | 50A | 1500V DC | 10AWG (6mm²) | 5.2-6.3mm | Residential solar+storage, small BESS |
| E70 | 70A | 1500V DC | 8AWG (10mm²) | 6.2-7.3mm | Commercial rooftop systems |
| E100 | 100A | 1500V DC | 6AWG (16mm²) | 5.5-8.5mm | Industrial BESS, energy storage containers |
| E120 | 120A | 1500V DC | 4AWG (25mm²) | 8.5-10.5mm | Large commercial installations |
| E150 | 150A | 1500V DC | Custom | Custom | Utility-scale projects |
| E200 | 200A | 1500V DC | Custom | Custom | Grid storage, solar power plants |
| E250 | 250A | 1500V DC | Custom | Custom | Utility-scale BESS |
| E300 | 300A | 1500V DC | Custom | Custom | Large solar+storage farms |
| E350 | 350A | 1500V DC | Custom | Custom | Mega-scale energy storage projects |
E50
E70
E100
E120
E150
E150
E200
E250
E300A
Product Video
How to Use Energy Storage Connectors？
Safety Reminders:
- Always de-energize the system before making connections
- Verify voltage and current ratings match system requirements
- Inspect connectors regularly for wear or damage
- Replace connectors that exceed 500 mating cycle lifespan
- Ensure proper cable strain relief to prevent mechanical stress
Step 01
Select Proper Installation Type
Front-Lock Socket: Use for indoor installations, maintenance-accessible areas, or where frequent disconnection is required.
Rear-Lock Socket: Choose for outdoor installations, marine environments, or applications requiring IP68 protection.
Step 02
Prepare the Cable
Strip cable insulation to the specified length (typically 10-14mm depending on model). Ensure wire section matches connector rating—450A connectors require heavy-gauge cables for safe current transmission.
Step 03
Crimping Connection
Insert stripped cable into connector terminal. Use recommended crimping tool to secure connection. AGX connectors feature tool-free push-in design for quick assembly without specialized equipment.
Step 04
Panel Mounting
Front-Lock: Insert connector through panel opening from front, secure with mounting hardware.
Rear-Lock: Install connector from rear of panel, lock into position for sealed installation.
Step 05
Mating Connection
Align male and female connectors carefully. Push together firmly until you hear an audible “CLICK”—this confirms secure mechanical and electrical connection.
Step 06
Verification
The check connector is fully seated with no gaps. Verify color-coded seals are properly positioned. For rear-lock installations, confirm IP68 seal integrity before energizing system.
Professional Manufacturing Process
How to Manufacture Energy Storage Connector ?
1
Raw Material Preparation & Injection Molding
High-grade PPO engineering plastic and tinned copper contacts undergo incoming quality inspection. Materials are tested for electrical properties, temperature resistance, and UV stability before entering production.
2
Precision Metal Contact Manufacturing
Automated injection molding machines create connector housings with 0.01mm tolerance precision. Multi-cavity molds ensure consistent dimensions and surface finish across all units.
3
Component Preparation & Integration
Tinned copper contacts are precisely inserted and secured using automated assembly equipment. Crimping force is monitored to ensure optimal electrical connection and pull-out strength.
4
Automated Assembly & Sealing
EPDM rubber gaskets and O-rings are installed using pneumatic presses. Each seal is checked for proper positioning to achieve IP67/IP68 waterproof rating.
5
CCD Visual Inspection & Quality Control
Every connector undergoes electrical testing including contact resistance, insulation resistance, and dielectric strength verification. Mechanical pull tests ensure locking mechanism reliability.
6
Comprehensive Performance Testing
Final inspection checks dimensional accuracy, surface quality, and functionality. Connectors are packaged in anti-static bags with protective caps for safe shipping.
Custom Energy Storage Connector
At AGX, custom energy storage connector orders are delivered within 7 to 15 days. We cater to all your custom engery storage connector needs for special events, architectural projects, and any other unique lighting requirements. Our custom options include:
Energy Storage Connector Customer Success Casesr
Still skeptical about switching connector suppliers? See what industry leaders achieved with AGX.
CASE STUDY:
Korea 26MW Solar Power Plant
“We needed 2.5 million connectors for harsh outback conditions. AGX delivered on time with zero field failures after 4 years of operation. Their quality saved us $2M in potential warranty claims.”
- Challenge: Extreme UV exposure and temperature cycling
- Solution: AGX Enhanced UV-Resistant MC4-1500V connector
- Results: 99.9% system uptime, 15% faster installation vs. previous supplier
CASE STUDY:
Italy 20KW Rooftop Solar System
“AGX helped us standardize on one connector across all installations. Their technical support and bulk pricing increased our profit margins by 23% while improving quality.”
- Challenge: Multiple connector types causing inventory and training issues
- Solution: Standardized AGX MC4 connector program with training
- Results: 40% reduction in installation time, zero warranty claims in 3 years
Why Energy Storage Connectors in Bulk from us?
Direct Factory Pricing
Cut out the middleman with manufacturer-direct pricing on all connector solutions. Enjoy wholesale rates regardless of order size, with volume discounts available for larger projects.
Variety of Connectors
With a diverse range of high-quality connectors available: in-line circular connectors, male and female connectors, LP series device connectors, waterproof junction boxes, MC4 solar connectors, energy storage connectors, and custom solutions.
Tough Protection Application
Engineered specifically for extreme environments, our IP68-rated waterproof connectors deliver superior protection against water, dust, chemicals, and salt spray. Ideal for marine applications, industrial machinery, and outdoor lighting installations.
Custom Available
Waterproof connectors tailored to your exact needs. Choose size, configuration, and even branding for perfect project fit.
Custom Available
Waterproof connectors tailored to your exact needs. Choose size, configuration, and even branding for perfect project fit.
Custom Available
Waterproof connectors tailored to your exact needs. Choose size, configuration, and even branding for perfect project fit.
Laboratory Quality Testing
All of our energy storage connector are not mass-produced until they have gone through multiple rigorous testing steps in our laboratory equipment. This ensures high performance and stability and the product’s long life.
Automatic Insertion and Extraction Tester
Temperature rise current tester
Voltage Tester
Horizontal plug-in test
DC Resistance + Insulation Resistance Tester
IP68 Waterproof Tester
Scorch Wire Tester
Leakage Trace Tester
Horizontal Vertical Flame Tester
Constant temperature and humidity tester
Our Certification
We always strive to provide our customers with the best possible customer experience when working with us. In addition to our excellent customer service, we want our customers to be confident that their waterproof junction boxes are safe and of the highest quality. To ensure the best performance, all our waterproof junction boxes have passed CE, RoHS certificates.
Ready to Partner with AGX for Your MC4 Connector Needs?
Energy Storage Connector FAQs
Frequently Asked Questions
General Questions
Q1: What types of energy storage connectors does AGX manufacture?
A: AGX produces a comprehensive range of high-voltage DC energy storage connectors, including our E-Series (50A-450A) with dual installation options (front-lock and rear-lock configurations). We specialize in connectors for battery energy storage systems (BESS), solar+storage applications, and utility-scale projects. All products comply with GB/T 33765, IEC 62852, and TÜV standards.
Q2: What is your minimum order quantity (MOQ)?
A: Our standard MOQ varies by product model. For our E-Series connectors (E50-E350), the MOQ typically starts at 100 sets. For customized OEM/ODM orders, MOQ depends on specific requirements. We offer flexible terms for distributors and system integrators with ongoing projects.
Q3: What certifications do your energy storage connectors have?
A: All AGX connectors are certified to international standards including GB/T 33765, IEC 62852, TÜV, and UL compliance. Our products feature UL94 V-0 fire rating, IP67/IP68 waterproof protection, and halogen-free materials. We provide full certification documentation and test reports with each order.
Technical Questions
Q4: What is the difference between front-lock and rear-lock connectors?
A: Front-lock connectors are installed from the front panel, ideal for indoor installations and applications requiring frequent maintenance access. Rear-lock connectors are installed from behind the panel and provide superior IP68 waterproof protection, recommended for outdoor installations, marine environments, or applications exposed to moisture and dust.
Q5: How do I select the right current rating for my application?
A: Select connector current rating based on your system’s maximum continuous current plus a 25% safety margin. For example, a 100A system should use a 120A-rated connector (E120). Consider factors including cable gauge, ambient temperature, and duty cycle. Our technical team can assist with proper sizing based on your specific application.
Q6: What is the operating temperature range of AGX connectors?
A: AGX energy storage connectors operate reliably from -40°C to +125°C, suitable for extreme climates including desert heat and arctic cold. Storage temperature range is -40°C to +80°C. This wide temperature tolerance ensures consistent performance across global installations.
Q7: What cable sizes are compatible with your connectors?
A: Each connector model supports specific wire gauges:
- E50: 10AWG (6mm²)
- E70: 8AWG (10mm²)
- E100: 6AWG (16mm²)
- E120: 4AWG (25mm²)
- E150-E450: Custom cable specifications available
Refer to our technical datasheets for detailed cable stripping lengths and crimping specifications.
Q8: How do I prevent cross-connection with solar PV connectors?
A: AGX energy storage connectors feature a 90° twisted mating face design that mechanically prevents mating with standard solar PV connectors. Additionally, our connectors use distinct color coding (different from PV orange) for visual identification. This fool-proof design ensures system safety and prevents installation errors.
Manufacturing & Customization
Q9: Do you offer OEM/ODM customization services?
A: Yes, AGX provides comprehensive OEM/ODM services including custom current ratings, cable lengths, connector colors, logo printing, and packaging design. Our engineering team works closely with clients from initial design through production and testing. Typical customization lead time is 4-6 weeks after design approval.
Q10: What is your production capacity and lead time?
A: Our manufacturing facility produces 50,000+ connector sets monthly with the ability to scale for large projects. Standard lead times:
- Stock items: 3-7 days
- Standard production: 2-3 weeks
- Custom orders: 4-6 weeks
- Urgent orders: Expedited production available upon request
- E150-E450: Custom cable specifications available
Q11: Can you provide samples for testing?
A: Yes, we provide pre-production samples for qualification testing. Sample lead time is typically 5-7 days. We offer free samples for qualified distributors and system integrators with active projects. Contact our sales team with your specific requirements and project timeline.
Quality & Reliability
Q12: What quality control processes do you follow?
A: AGX implements rigorous quality control at every production stage including incoming material inspection, in-process testing, and final product verification. Each batch undergoes electrical performance testing (contact resistance, insulation resistance, dielectric strength), mechanical testing (insertion/withdrawal force, vibration), and environmental testing (temperature cycling, humidity). We provide full test reports and certificates of compliance.
Q13: What is the expected lifespan of your connectors?
A: AGX energy storage connectors are rated for 500+ mating cycles and designed for 20+ years of service life in properly maintained systems. Actual lifespan depends on operating conditions, installation quality, and maintenance practices. Our silver/tin-plated contacts resist corrosion and maintain low contact resistance throughout the product lifecycle.
Q14: What warranty do you offer?
A: AGX provides a standard 5-year warranty covering manufacturing defects and material failures under normal operating conditions. Extended warranty options are available for large-scale projects. Warranty covers replacement of defective products and does not include installation labor or consequential damages.
Installation & Support
Q15: Are special tools required for installation?
A: No specialized tools are required. AGX connectors feature tool-free crimping installation with audible “CLICK” confirmation for secure connection. Standard cable stripping tools and torque screwdrivers (for panel mounting) are sufficient. We provide detailed installation manuals and video guides with each order.
Q16: Do you provide technical support and training?
A: Yes, AGX offers comprehensive technical support including installation guidance, troubleshooting assistance, and system design consultation. We provide on-site training for large projects and distributor partners. Remote support is available via email, phone, and video conference during business hours (GMT+8).
Q17: What should I do if a connector fails in the field?
A: Contact our technical support team immediately with photos, serial numbers, and failure description. We provide rapid response for field issues including troubleshooting guidance and expedited replacement shipping if needed. For systemic issues, we dispatch field engineers for on-site investigation and resolution.
Ordering & Logistics
Q18: What are your payment terms?
A: Standard payment terms:
- New customers: 30% deposit, 70% balance before shipment
- Established customers: Net 30-60 days with approved credit
- Large orders: Flexible terms negotiable
- Accepted methods: T/T, L/C, PayPal (for samples)
Q19: How do you handle international shipping?
A: AGX ships globally via sea freight, air freight, or express courier (DHL, FedEx, UPS) depending on order size and urgency. We handle export documentation, customs declarations, and provide full tracking. Shipping costs and delivery times vary by destination and order volume. FOB Ningbo is our standard term, CIF/DDP available upon request.
Q20: How can I become an AGX distributor?
A: We welcome partnerships with qualified distributors, wholesalers, and system integrators. Distributor benefits include preferential pricing, marketing support, technical training, and local inventory programs. Contact our sales team with your company profile, target markets, and estimated annual volume for partnership evaluation.
Submit Your Waterproof Connector Request
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To get the fastest response, submit your inquiries using the form. If you encounter any issues with submission, you can also email us directly at cindy@agxconnector.com
