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China PV AC Combiner Box with Stainless Steel Enclosure Manufacturer, Supplier, Factory
Summary: Taili, a professional China manufacturer with 38 years of low and medium voltage power distribution equipment production experience, supplies industrial-grade PV AC Combiner Box with Stainless Steel Enclosure for harsh-condition photovoltaic projects. Different from conventional cold-rolled steel and galvanized steel enclosures, this model adopts integrated stainless steel shell molding process, featuring natural corrosion resistance, oxidation resistance and structural stability. With standard IP65 protection and IP66 cable plug protection, the equipment maintains stable mechanical structure and complete electrical performance in coastal, high-humidity, dusty and chemically corrosive environments. Supported by strict factory testing and 20–30 year service life design, it is a durable and low-maintenance power convergence device for long-term outdoor photovoltaic operation.
Structural Characteristics of Stainless Steel Enclosure
The enclosure material determines the long-term operational stability of outdoor combiner boxes. The PV AC Combiner Box with Stainless Steel Enclosure adopts industrial-grade stainless steel plate as the base material, with physical and chemical properties far exceeding conventional carbon steel materials, suitable for long-term exposed outdoor operation.
1. Corrosion & Rust Resistance: The stainless steel material has stable chemical properties, which can resist rainwater erosion, salt spray corrosion in coastal areas and slight chemical gas corrosion, avoiding shell rust, perforation and structural damage.
2. High Structural Rigidity: Integrated bending and seamless welding process improves the overall compression and impact resistance of the box body, preventing shell deformation caused by external extrusion, strong wind and hail impact.
3. Surface Anti-Aging Performance: Passivation treatment is adopted on the surface, no paint spraying is required, and it will not fade or peel off after long-term ultraviolet radiation, maintaining stable sealing and appearance integrity.
4. Easy Daily Maintenance: The smooth surface of stainless steel is dust-proof and easy to clean, which can keep the interior and exterior of the box clean for a long time and reduce the hidden danger of circuit failure caused by dust accumulation.
Enclosure Material Contrast Table
In outdoor photovoltaic engineering applications, different box materials bring obvious differences in service life, maintenance cost and environmental adaptability. The following table intuitively compares the practical performance of PV AC Combiner Box and other conventional materials.
| Performance Item | Cold Rolled Steel Enclosure | Hot-Dip Galvanized Steel Enclosure | Stainless Steel Enclosure |
| Anti-Rust Ability | Poor, easy to rust after water wetting | Medium, galvanized layer will age and fall off | Excellent, natural anti-rust without coating |
| Salt Spray Resistance | Not applicable for coastal areas | Short-term resistance, easy to corrode in long-term salt fog | Long-term salt spray corrosion resistance |
| UV Aging Resistance | Paint fades and peels easily | Surface coating ages gradually | No fading, no aging deformation |
| Service Life | 5-10 years | 10-15 years | 20-30 years consistent design life |
| Later Maintenance Frequency | High, need regular anti-rust painting | Medium, regular surface inspection required | Low, basically maintenance-free shell |
| Applicable Scenario | Indoor & dry environment | Ordinary outdoor environment | Coastal, humid, dusty, corrosive outdoor environment |
Complete Technical Parameters
The electrical performance of PV AC Combiner Box with Stainless Steel Enclosure fully conforms to Taili’s industrial standard specifications, and all parameters are verified by professional electrical testing equipment to ensure stable and consistent batch performance.
| Model | BWX-AC4 | BWX--AC6 | BWX-AC8 |
| Input ways | 1-4 | 5-6 | 7-8 |
| Input voltage | AC690V | ||
| Input current | 0-1000A | ||
| Output current | 250A | 400A | 630A |
| Rated working voltage Un | 480VAC | ||
| Protective voltage Up | ≤3.2kV | ||
| Standard throughput In(8/20μs) | 20kV( Optional according to customer requirements) | ||
| Max ,throughput capacity Imax(8/20μs) | 40kV( Optional according to customer requirements) | ||
| Corresponding time | ＜25ns | ||
| Temperature and humidity | Operating temperature:-40~+85℃，humidity 95%, non-condensing , non-corrosive gas locations | ||
| Altitude | ≤4000m | ||
| Enclosure material | Stainless steel customized enclosure | ||
| IP class | IP65 | ||
| Cable plug IP class | IP66 | ||
| Size (W.H.D) | 800*600*200mm | 800*800*200mm | 800*1000*200mm |
Applicable Engineering Scenarios for Stainless Steel Shell
The structural durability of PV AC Combiner Box makes it more targeted in harsh outdoor photovoltaic projects, solving the problem of frequent equipment replacement caused by shell corrosion and aging in special environments.
1. Coastal Photovoltaic Power Stations: Effectively resist high salt spray and high humidity environment, avoid shell corrosion and sealing failure, and ensure long-term stable operation of seaside photovoltaic projects.
2. Industrial Zone Photovoltaic Projects: Adapt to slightly corrosive industrial gas and dust environment, prevent box body damage and internal circuit pollution, and improve system operation safety.
3. Desert & Gobi Photovoltaic Power Stations: Resist strong ultraviolet radiation and wind and sand erosion, no shell aging and deformation, and reduce outdoor equipment maintenance pressure.
Factory Quality Control & Durability Certification
All PV AC Combiner Box products are produced in accordance with ISO9001 quality management system standards. The stainless steel shell undergoes strict salt spray test, ultraviolet aging test and structural pressure resistance test before leaving the factory. The company’s 10 professional quality inspectors conduct full-process inspection on material cutting, welding, sealing and assembly processes to ensure no welding gap, no structural deformation and stable IP65 protection performance.
The product enjoys a 2-3 year factory warranty, and the stainless steel shell can maintain stable structural performance for 20-30 years. It is a high-cost-performance and long-life supporting device for long-term operation of outdoor photovoltaic power stations.
Product Technical FAQ
Q1: Does the stainless steel enclosure affect the internal heat dissipation of the combiner box?
A1: No. Taili’s PV AC Combiner Box adopts a standardized heat dissipation structural design. The stainless steel material has good thermal conductivity, and the reserved heat dissipation gap and convection structure inside the box can effectively export operating heat. The shell material will not cause heat accumulation, and the internal electrical components can operate within a normal temperature range for a long time.
Q2: Is stainless steel enclosure necessary for coastal photovoltaic projects?
A2: It is necessary. Conventional iron and galvanized boxes are prone to salt spray corrosion, welding seam rust and sealing failure in coastal high-salt environments, which will lead to water and moisture entering the box and cause circuit failure. PV AC Combiner Box with Stainless Steel Enclosure has natural salt spray corrosion resistance, which can effectively avoid environmental damage to the equipment and meet the long-term operation requirements of coastal photovoltaic projects.
Q3: Will the stainless steel shell be deformed by strong wind or external impact?
A3: No. The product adopts thickened stainless steel plate and integral seamless welding process, with high overall structural strength. It has passed professional impact resistance and wind pressure resistance tests, and can resist outdoor strong wind, hail and accidental extrusion impact, maintaining complete box structure and stable sealing performance.
Q4: What is the difference in later maintenance between stainless steel enclosure and ordinary enclosure?
A4: The ordinary enclosure needs regular anti-rust treatment, paint repair and dust cleaning every year, with high maintenance cost. PV AC Combiner Box has no rust and peeling problems, and the smooth surface is easy to clean. Daily maintenance only needs simple dust inspection, which greatly reduces the later operation and maintenance workload and maintenance cost of photovoltaic power stations.
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