Solar Junction Box Components
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About solar junction box components
Where to Find Solar Junction Box Components Suppliers?
China remains the central hub for solar junction box components manufacturing, with key production clusters in Zhejiang and Guangdong provinces. Yueqing City in Zhejiang hosts a concentrated ecosystem of electrical component manufacturers, offering vertically integrated supply chains that span raw material processing, injection molding, terminal assembly, and waterproof sealing technologies. This regional specialization enables streamlined production of critical elements such as IP67-rated enclosures, copper busbars, diode housings, and cable glands.
The industrial cluster supports rapid prototyping and scalable output, with many suppliers operating under ISO 9001 quality management systems and producing to meet IEC 62790 and UL 1741 compliance standards. Local access to cold-rolled steel, engineering plastics (PC/ABS), and silicone rubber reduces material lead times by 15–20% compared to offshore alternatives. Buyers benefit from consolidated logistics networks, with Ningbo and Wenzhou ports facilitating efficient containerized shipments to global markets. Average production cycles range from 15–25 days for standard configurations, with expedited runs available for pre-stocked materials.
How to Choose Solar Junction Box Components Suppliers?
Procurement decisions should be guided by technical capability, compliance verification, and operational reliability metrics:
Quality & Compliance Verification
Confirm adherence to international standards including IEC 62790 (junction box safety), RoHS (hazardous substance restrictions), and UL certification where applicable. Request test reports for thermal cycling (–40°C to +90°C), dielectric strength (AC 4,000V), and ingress protection (IP65/IP67). For outdoor installations, UV-resistant housing materials and anti-corrosion coatings are essential.
Production Capacity Assessment
Evaluate supplier infrastructure based on the following indicators:
- In-house tooling and mold-making capabilities for custom enclosure designs
- Automated soldering or welding lines for diode and terminal integration
- Capacity to support CAD-based customization for flange dimensions, cable entry points, and labeling
- Monthly output exceeding 50,000 units for high-volume procurement stability
Cross-reference online transaction data with on-time delivery performance—suppliers maintaining ≥98% punctuality rates demonstrate stronger production planning and inventory control.
Transaction Risk Mitigation
Utilize secure payment frameworks with milestone-based disbursements tied to production milestones. Prioritize suppliers offering sample validation prior to bulk orders, with typical sampling lead times of 7–14 days. Conduct factory audits via video walkthroughs to verify CNC machining centers, environmental testing chambers, and final assembly lines. Ensure packaging meets export-grade requirements for shock and moisture resistance.
What Are the Best Solar Junction Box Components Suppliers?
| Company Name | Type | Main Products | Customization Options | On-Time Delivery | Avg. Response | Online Revenue | Reorder Rate |
|---|---|---|---|---|---|---|---|
| Yueqing Feeo Electric Co., Ltd. | Custom Manufacturer | Miniature Circuit Breakers, Surge Protection Devices, Solar Combiner Boxes | Material, size, logo, wiring diagram, label | 100% | ≤3h | US $620,000+ | <15% |
| Zhejiang Dabai Electric Co.,Ltd. | Custom Manufacturer | Waterproof AC/DC Combiner Boxes, PV String Boxes | Color, material, size, logo, packaging, wiring diagram | 100% | ≤3h | US $350,000+ | 26% |
| Wenzhou Pls New Energy Technology Co., Ltd. | Manufacturer | Solar Combiner Boxes, Isolating Switches, DC Enclosures | ABS/Plastic housing, switch configuration, voltage rating | 100% | ≤1h | US $40,000+ | 25% |
| Yueqing Qili Electrical Co., Ltd. | Multispecialty Supplier | PVC Junction Boxes, Electrical Enclosures | Dimensions, color, labeling, graphic printing | 100% | ≤2h | US $20,000+ | 25% |
| Yueqing Saip Electric Co., Ltd. | Custom Manufacturer | Electronics Enclosures, Push Button Switches, Solar Junction Boxes | Steel wire holes, silk screen logos, flange CAD drawings, rubber plugs | 94% | ≤5h | US $20,000+ | <15% |
Performance Analysis
Yueqing Feeo and Zhejiang Dabai lead in both volume capacity and compliance rigor, with 100% on-time delivery records and robust customization infrastructure. Their higher revenue volumes reflect established export operations across Europe and Southeast Asia. Wenzhou Pls New Energy stands out for responsiveness (≤1h average reply time) and niche expertise in isolating switch-integrated combiner boxes rated up to 1500VDC. While Yueqing Qili offers competitive pricing on PVC-based enclosures, its multispecialty profile suggests less dedicated focus on solar-specific reliability testing. Saip Electric maintains strong design flexibility but lags slightly in delivery consistency (94%) compared to top-tier peers.
FAQs
What certifications should solar junction box components have?
Essential certifications include IEC 62790 for safety and performance, TÜV or UL listing for market access in Europe and North America, and RoHS compliance for environmental standards. CE marking is commonly provided for export-ready batches.
What is the typical MOQ and pricing range?
Minimum order quantities vary from 2 to 100 pieces depending on model complexity. Standard combiner boxes range from $22–$46 per unit, while specialized versions with integrated fuses or surge protectors reach $60–$110. Bulk orders (≥1,000 units) typically qualify for 15–25% discounts.
Can suppliers customize junction box dimensions and materials?
Yes, most manufacturers offer full CAD-driven customization for enclosure size, cable entry positions, flange configurations, and material selection (e.g., PC, ABS, or metal alloys). Silk-screened labels, company logos, and color coding are standard options.
What are common lead times for samples and mass production?
Sample lead times average 7–14 days, depending on design complexity. Mass production cycles range from 15–25 days after deposit confirmation. Expedited production (10–15 days) may be available for repeat orders using existing molds.
Do suppliers support dropshipping or third-party logistics?
Larger suppliers offer FOB terms with coordination for sea or air freight consolidation. Some provide warehouse dispatch services through Ningbo or Shanghai ports. Direct-to-distributor shipping is feasible with proper documentation and labeling.
