WSDB-PV4/4 1000V 4 in 4 Out 4 String 32A Photovoltaic Array Solar PV Combiner Box for off Grid Solar Panel Energy System

Product Description

Technical Specifications
System Specifications Enclosure Parameters
Model No WSDB-PV4/4 (1000v) Enclosure WS-PN 36way
Include 8 PCS fuse + 4 PCS 4p 1000v isolator +4 pcs 3p 1000v spd +WSPN distribution box+solar connector+cable gland Material Type PC/ABS
Input 4 strings Degree of Protection IP65
Output 4 strings Degree of Resistance to lmpacts IK10
Maximum Voltage 1000V Dimension (WxHxD) 380*381*110 mm
Max DC Short Circuit Current Per Input (Isc) 32A Cable Input Entry MC4 2.5-6mm²
Maximum Current Output 32A Output Cable Gland PG9 2.5-16mm²
Certification CE - -
DC Isolator Switch (WISO-32) DC Surge Arrester (XlSPD-PV)
Rated lnsulation Voltage (Ui) 1000v Max Operation Voltage (Ucpv) 1000v
Rated Current (le) 32A Standard Compliance with EN61643-3
Standard Compliance with IEC60947-3 Nominal Discharge Current 20kA
Certification CE Maximum Discharge Current 40kA
Poles 4P Voltage Protection Level 3.8KV
- - Poles 3P
- - Certification TUV CE
DC Fuse Holder (WSPV-32B) Environment & Parameters
Rated Working Voltage 1000v Operating Temperature -25°C ~ +55°C
Fuse Link 10x38mm 15A Humidity 0-95%, no condensation
Certification CE TUV IEC Altitude 2000M
- - Installation Wall Mounting
Why Choose Our Combiner Box?
Every component inside the combiner box is manufactured in-house, ensuring its quality and stable, controllable performance.
Complete In-House Manufacturing Every single component is manufactured in-house for stable and controllable product quality.
Certified Components Fuse/MCB/SPD certificates include TUV, CB, IEC, CE, and ISO9001.
Rigorous Testing Every component and finished product undergoes comprehensive testing before shipment.
Strong Production Capacity With a capacity of up to 20,000 PCS per month to support large orders.
Deep Manufacturing Experience Extensive experience in producing over a thousand styles of combiner boxes.
High Cost Performance Lower cost structure as each component and process is managed internally.
Flexible Customization Supports string customization (Common 1-48 strings) and optional parameters up to 1500V.
Abundant Enclosure Options IP30-IP67 ratings with 14 series and 152 types of enclosures available.
Factory & Advanced Production Facilities
Factory Overview

11,532㎡ Factory

Spacious modern manufacturing facility with annual exports exceeding 20 million US dollars.

Injection Molding

31 Injection Molding Machines

Equipped with 605 sets of molds to guarantee high-performance plastic components.

Surge Protector Molding

Surge Protector Molding

30 dedicated surge molds covering every tiny interior component for precise fitting.

Fuse Housing Molding

Fuse Housing Molding

28 sets of fuse molds covering configurations from 15A to 960A and 500V to 1500V.

Distribution Box Molding

Distribution Box Molding

408 sets of molds, covering 15 series and 153 types of distribution boxes.

Solar Connector Molding

Solar Connector Molding

36 molds covering connector components such as male/female heads, nuts, and claws.

Quality Parts Warehouse

Quality Parts Warehouse

Built with high-quality precious metal parts including copper and pure silver.

Surge Production Line

Surge Production Line

Dedicated surge production capability supplying up to 50,000 units per week.

Connector Line

Automated Connector Line

Highly automated assembly lines producing up to 300,000 units per day.

Fuse Production Line

Fuse & Overvoltage Protection

Production line capability producing 50,000 fuses per week.

Circuit Breaker Line

Circuit Breaker Line

Specialized manufacturing lines producing 100,000 circuit breaker units per week.

Distribution Box Line

Distribution Box Line

High capacity production lines outputting 100,000 plastic boxes monthly.

Quality Control & Laboratory Testing
Surge Lightning Test

Lightning Strike Laboratory

Testing protection limits to ensure all surge protectors comply with standard ratings.

Fuse Testing

Fuse Performance Testing

Rigorous test cycles verifying current-limiting properties and disconnection accuracy.

Circuit Breaker Test

Circuit Breaker Testing

Ensures overload protection and instant short-circuit tripping works reliably.

Waterproof Test

Waterproof Testing

Execution of strict IP65 to IP67 ingress testing for reliable outdoor installations.

Flame Retardant Test

Flame Retardant Testing

Testing structural plastics to ensure they meet the UL94 V0 rating standard.

Connector Testing

Connector Testing

Verifying contact resistance, tensile strength, and long term anti-aging properties.

Assembly & Warehouse
Inventory Warehouse

4200㎡ Inventory Warehouse

Well-stocked inventory area optimized for rapid allocation and fulfillment of parts.

Assembly Process

Standardized Assembly

Optimized assembly processes configured for quick, precise, and error-free build cycles.

Combiner Box Line

Combiner Box Line

Capable of producing more than 20,000 completed combiner boxes every month.

Enclosure Options
IP40 WSMF

IP40 WSMF Box

Dustproof enclosure suitable for indoor AC combiner box installations.

IP65 WSHT

IP65 WSHT Box

Compact IP65 rated casing featuring a top and bottom open mechanism.

IP65 WSPN

IP65 WSPN Box

Compact row design opening left/right with a styled frosted window box.

IP65 WSHA

IP65 WSHA Box

Large internal volume enclosure with a left and right swing-opening design.

IP65 WSHAN

IP65 WSHAN Box

Modernized, compact box styling designed to meet current market demands.

IP66 WSKG

IP66 WSKG Box

Robust plastic buckle design, left/right swing open with IP66 protection level.

IP66 WSBG

IP66 WSBG Box

Secured with metal buckles, left/right swing open with IP66 protection level.

IP67 WSAG

IP67 WSAG Box

Plastic screw closure for high waterproofing; transparent or opaque lids.

IP65 Metal Box

IP65 Metal Box

Heavy-duty, high impact resistance metal box suitable for harsh environments.

Combiner Box Configurations & Types
MCCB Box

MCCB Protective Box

Protective enclosure option designed specifically to house and protect circuit breakers.

Isolator Box

Isolator Switch Box

Individual isolating cores and custom protection boxes available for single/multiple switches.

Fuse+MCB+SPD

FUSE+MCB+SPD Box

The standard system configuration providing comprehensive double-protection layout.

Fuse+SPD

FUSE+SPD Box

Economical configuration combining overcurrent protection with surge protection.

MCB+SPD

MCB+SPD Box

Combines overcurrent/short-circuit safety (MCB) with surge suppression (SPD).

Fuse+Isolator+SPD

Fuse+Isolator+SPD Box

Fuses for overcurrent, isolation switch for safe maintenance, and SPD for surges.

AC Combiner Box

AC Combiner Box

Designed for secondary distribution grid setups and inverter output side protection.

DC+AC Combiner Box

DC+AC Combiner Box

Combined DC protection (PV to inverter) and AC protection (inverter to load) in one unit.

500V Box

500V Combiner Box

Designed and optimized for solar power generation systems below 500V.

1000V Box

1000V Combiner Box

Standard rating configuration suitable for systems operating below 1000V.

1500V Box

1500V Combiner Box

High voltage configuration optimized for heavy systems operating up to 1500V.

1 String Box

1 String Combiner Box

Available in three configuration models: 1-in/1-out (500V, 1000V, 1500V).

2 String Box

2 Strings Combiner Box

Available in six configuration models (2-in/1-out, 2-in/2-out; 500V, 1000V, 1500V).

3 String Box

3 Strings Combiner Box

Available in six configuration models (3-in/1-out, 3-in/3-out; 500V, 1000V, 1500V).

4 String Box

4 Strings Combiner Box

Available in nine configurations (4-in/1-out, 4-in/2-out, 4-in/4-out; 500V, 1000V, 1500V).

5/6 String Box

5-6 Strings Combiner Box

Available in six configurations: 5/1, 6/6 in 500V, 1000V, and 1500V ratings.

6 String Box Variants

6 Strings Variants

12 custom models available: 6/1, 6/2, 6/3, and 6/6 configurations across all voltages.

7-48 Strings Custom

7-48 Strings OEM/ODM

Custom setups for any combinations of A/V specifications, string counts, and components.

Product Certifications
ISO9001

ISO9001 Certificate

Fuse TUV

FUSE TUV Certificate

Fuse CB

FUSE CB Certificate

Fuse CE

FUSE CE Certificate

MCB CB

MCB CB Certificate

MCB TUV

MCB TUV Certificate

MCB CE

MCB CE Certificate

SPD TUV

SPD TUV Certificate

SPD CE

SPD CE Certificate

Solar Connector CE

Solar Connector CE

Distribution Box CE

Distribution Box CE

Junction Box CE

Junction Box CE

Certification Showcase
Each of our main products is fully certified. We apply for new certifications annually to meet evolving regional criteria.
Exhibitions
We participate in about 6-7 global exhibitions every year.
Exhibition Space
Exhibition Showcase
Global Trade Show
Product Display Area
Booth Interaction
Exhibition Discussion
Our Professional Services
Free Videos & Pictures Introductory videos, product catalogs, and high-definition photos are provided to facilitate your sales.
Free Sample Service We provide free samples for quality evaluation and standard system compliance testing.
Free OEM Service We customize logo printings on products and supply digital pre-production configurations for confirmation.
Material-Based Pricing Target prices and specific bills of materials can be configured to match your target markets.
24/7 Rapid Response A dedicated sales team with structural English proficiency handles inquiries within minutes.
Up to 20-Year Warranty Connectors include a 20-year warranty, while other system components are backed by a 2-5 year warranty.
One-Stop Shopping Solution
We manufacture all DC protectors for photovoltaic systems ourselves. With 15 series and 152 types of distribution boxes ranging from IP30 to IP67, we cover all enclosure sizes to save you money and effort.
One Stop Solar Component Supply
Frequently Asked Questions
Q: When can I receive a quotation and detailed information after sending an inquiry?
A: All inquiries are processed promptly, and a detailed reply will be sent within 24 hours.
Q: Do you provide samples? Is it free or extra?
A: Yes, we offer product samples for quality evaluation free of charge. However, we do not pay the cost of freight.
Q: What is the typical lead time and delivery schedule?
A: Sample configurations require 3-5 days. Standard bulk orders exceeding 1,000 pieces typically require 7-15 days.
Q: What is the warranty period offered for your products?
A: We offer a three-year warranty period for our distribution and combiner box units. Connectors carry a warranty of up to 20 years.
Q: How does your factory control the quality of the products?
A: Our manufacturing follows IEC standards. We control quality through 4 main stages: raw material testing, production process logs, finished product performance testing, and final factory checks.
Q: What are your standard terms of payment?
A: For payments under $1,000 USD, 100% in advance. For orders of $1,000 USD and above, we accept 30% T/T in advance, with the remaining balance due before shipment.

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