MC4 Solar Connector – 30A, 1000V IP68 Connector for PV Systems
PV4 Photovoltaic Connector for 4mm² and 6mm² Solar Cables, Designed for Secure, Weather-Resistant and Reliable Connections in Residential, Commercial and Utility-Scale PV Installations
What Is an MC4 Solar Connector?
MC4 is the connector format most commonly used to join solar panels in photovoltaic systems. The name comes from the original Stäubli design, and the format has become the de facto standard across the industry: a single-pole connector with a male and a female half, a positive locking mechanism, and field-installable crimp termination. Our PV4 series is built to this MC4 connector format, which means it works with standard MC4-style equipment when both sides are properly certified for interoperability.
Three ratings matter most when you evaluate an MC4 solar connector:
MC4 Solar Connector Specifications
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| Parameter | Value |
|---|---|
| Model | MC4 (PV4 Series) |
| Product Type | IP68 PV Solar Connector |
| Rated Current | 30A |
| Rated Voltage | 1000V AC |
| Wiring Range | 4mm² / 6mm² |
| Housing Material | Flame-retardant plastic, UL 94 V-2 |
| Contact Material | Copper Alloy |
| Working Temperature | T100 |
| Ingress Protection | IP68 |
| Certifications | CE, RoHS |
| Pole Options | 2P / 3P |
The datasheet with dimensions and available certification documents can be found in our solar energy connector downloads .
How to Choose the Right MC4 Solar Connector
The connector is only part of the decision. The cable size you pair with it affects voltage drop, conductor temperature, installation flexibility, and long-term performance, so the connector and cable should be selected as one system.
| Application | Recommended Cable | Why |
|---|---|---|
| Residential rooftop strings (15–25A typical) | 4mm² | Suitable for many mainstream residential PV string applications while keeping cable routing and installation relatively simple. Always verify conductor ampacity and voltage-drop requirements for the actual system. |
| Commercial and utility arrays with long DC runs | 6mm² | The larger conductor can reduce cable resistance, voltage drop, and conductor heating over longer DC cable runs. |
| Hot climates and high-irradiance sites | 6mm² | A larger conductor may provide additional thermal and voltage-drop margin where high ambient temperatures require cable ampacity derating. Final cable size should follow the project design and applicable electrical standards. |
| 1500V DC PV systems | Not This Model | This 1000V model should not be used in a 1500V DC PV circuit. Select a photovoltaic connector specifically rated for the system’s maximum DC voltage. |
What to Check Before You Buy MC4 Solar Connectors
Buyers who order the wrong connector usually miss one of these five critical checkpoints:
1
System voltage versus connector rating 1000V vs 1500V
This connector is rated 1000V. Do not install it in a 1500V string. The connector voltage rating must be suitable for the maximum system voltage, including the cold-temperature open-circuit voltage correction used in the PV system design.
2
Current versus module Isc 30A Rating
This model is rated 30A, but always verify connector current capacity against the actual PV module and system design. Higher-current modules and parallel circuit configurations can increase current requirements, so adequate electrical and thermal margin should be maintained.
3
Cable size and crimp tooling 4mm² / 6mm²
Use the correct crimp die and tooling specified for 4mm² or 6mm² solar cable. An incorrect or incomplete crimp can increase contact resistance and generate excessive heat, reducing connection reliability. Follow our technical guide on how to crimp MC4 connectors before installation. For production or project-level quality control, verify the crimp using the terminal manufacturer’s specified pull-force and crimp-quality requirements.
4
International certifications CE & RoHS
This product is supplied with CE and RoHS compliance documentation. If your utility, EPC, commercial project, or local authority requires TÜV or UL certification, confirm the required certification and product version before placing an order.
5
Cross-brand interoperability Mating Validation
“MC4-compatible” does not automatically mean that connectors from different manufacturers can be safely intermated. Contact geometry, dimensional tolerances, sealing interfaces, materials, and certification conditions may differ even when the external locking design appears similar. Before mixing connector brands, verify manufacturer documentation and applicable project requirements. You can also review our engineering notes on MC4 connector mating cycles .
Critical Field Safety Directive
Never mate or unmate a PV connector under electrical load. Isolate the PV circuit and follow the applicable electrical safety and lockout procedures before connecting, disconnecting, inspecting, or servicing PV connectors.
REQUEST AN MC4 SOLAR CONNECTOR SAMPLE
As a waterproof connector manufacturer, PVLinkTech provides samples so you can test product quality, fit, and performance before placing an order.
Free Sample Request
Tell us about your project and our team will help you select the right waterproof connector sample.
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Where the MC4 Solar Connector Is Used
Engineered for harsh environments and high DC voltage systems, MC4 connectors ensure consistent power delivery and IP68-rated weatherproofing across all solar installations.
Solar Panel String Interconnection
This is the core job of the connector: joining panel to panel in series so the array delivers one string voltage to the inverter. The connector sits outdoors for the life of the system, sealed against rain and condensation, so seal integrity and contact quality decide whether the string stays at rated output from the first season to the last.
Combiner Box to Inverter DC Input
Between the combiner box and the inverter, DC runs can be long and the cable larger. Here the 6mm² configuration earns its keep by keeping voltage drop and contact temperature down on the final leg of the DC circuit.
Off-Grid & Portable Solar Systems
Rooftop contractors are not the only buyers. Off-grid cabins, mobile solar kits, and temporary installations all use the same MC4 format, and the same crimp discipline applies whether the array is permanent or seasonal. For portable kits, a connector that mates and unmates cleanly over many setup cycles is worth more than a marginally cheaper alternative.
Solar-Powered Lighting & DC Distribution
Street and area lighting systems distribute DC power to luminaires, and IP68 connectors protect those joints in enclosures that are rarely opened. The failure mode is the same everywhere: a degraded contact raises resistance, resistance raises temperature, and heat accelerates oxidation until the connection fails. That is why contact quality and a clean crimp matter more than any other factor. When a connector does fail in the field, the cause is usually visible. Our guide on diagnosing MC4 connector failures walks through what burnt contacts, melted housings, and water ingress actually mean, so you can stop the same failure from repeating.
Why Buy MC4 Solar Connectors from Our Factory
We manufacture MC4-style solar connectors in our own facility and focus our quality control on the areas that directly affect connection reliability: crimp quality, sealing performance, and contact resistance . Each production batch is inspected before shipment, and available compliance and test documentation can be provided according to the ordered product configuration.
For OEM and ODM Projects We Offer:
Customization & Branding
Custom logo, cable color, cable length, and packaging options for distributors, equipment manufacturers, installers, and private-label projects.
Pre-Crimped Assemblies
Pre-crimped and pre-assembled solar cable sets are available to reduce field termination work and improve installation consistency.
Sample Qualification
Sample orders are available for engineering evaluation, fit checks, electrical testing, and project qualification before volume purchasing.
Supply Chain Support
Production support for distributors, installers, EPC projects, and equipment manufacturers, with stable production planning and batch traceability.
If you are sourcing MC4 solar connectors for a project, send us your system voltage, cable size, required connector configuration, and quantity. We can review the application requirements and provide the appropriate product configuration and factory quotation.
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Frequently Asked Questions
Technical specifications, certifications, and compatibility guide for our solar connectors.
MC4 is a connector format originally defined by Stäubli. Our PV4 series follows the MC4 format, but safe interoperability between different brands depends on documented, certified compatibility on both sides. If your project requires mating with a specific brand, send us the details and we will confirm before you order.
No. This connector is rated 1000V. For 1500V architectures, use a connector rated for 1500V, such as our energy storage connectors, or follow the 1500V BESS connector selection guide.
4mm² and 6mm². Use the matching crimp die and follow the crimping procedure in our how to crimp MC4 connectors guide.
CE and RoHS. The housing is flame-retardant to UL 94V-2. If your project requires other marks, confirm before ordering.
Mating cycle life depends on contact plating and crimp quality. Our PV4 series is rated for over 100 cycles, and the exact figure for your configuration is in the datasheet. More detail in MC4 connector mating cycles.
Yes. Standard products are available in small quantities for testing and qualification.
Yes. We customize logo, cable color, cable length, and packaging, and we supply pre-assembled cable sets.
