In photovoltaic (PV) systems, reliable connectors are crucial for efficient energy transmission and long-term system stability. Staubli MC4 and MC4-Evo2 are industry-standard connectors, each offering unique advantages for different applications. This guide helps PV EPCs, installers, distributors, wholesalers, and system integrators choose the right connector to maximize system performance and return on investment.
Advantages of MC4-Evo2: Higher Performance & Superior Durability
Enhanced Voltage Support: Supports 1500V DC (compliant with IEC, UL, and JET certifications), ideal for high-voltage PV power plants.
Increased Current Capacity: Rated current up to 69A (for 10mm² cables), significantly exceeding traditional MC4 capabilities. Suitable for high-power PV modules and high-power-density systems.
2. Low Contact Resistance for Improved Energy Transmission
Contact resistance ≤0.2 mΩ, minimizing transmission losses and improving overall system efficiency.
3. Excellent Environmental Resistance
IP68 protection rating (when mated, waterproof for 1 hour at 1m depth), ensuring reliability in extreme weather conditions.
UV-resistant, ammonia-resistant, and salt mist corrosion-resistant, making it ideal for coastal, high-humidity, and high-pollution environments.
4. Compatibility & Easy Installation
Fully compatible with traditional MC4, allowing seamless upgrades to existing systems without replacing all connectors, reducing retrofit costs.
Flexible installation, supporting on-site crimping or pre-assembly with standard crimping tools, simplifying the installation process.
5. Certified Safety & Reliability
Certified by IEC, UL, JET, cTÜVus, and complies with international standards such as UL 6703 and IEC 62852 to ensure long-term operational safety.
UL94-V0 flame retardant rating, salt mist resistance at severity level 6, suitable for harsh environments.
Multiple model options, supporting 2.5-10 mm² cable cross-sections for various PV system requirements.
Advantages of MC4: Proven, Cost-Effective, and Highly Compatible
1. Industry Standard with High Market Acceptance
As the most widely used PV connector, MC4 ensures compatibility with most PV modules and inverters, making maintenance and replacements easier and more cost-effective.
2. More Cost-Effective
Traditional MC4 connectors are more affordable, making them ideal for budget-conscious projects or PV systems with lower performance requirements.
Selection Guide: How to Make the Right Choice?
Selection Scenario | Recommended Connector | Reasoning |
Large-scale PV plants, 1500V high-voltage systems | MC4-Evo2 | Supports higher voltage, reduces system losses, and improves long-term profitability |
Extreme environments (high UV, salt mist, ammonia exposure) | MC4-Evo2 | IP68 protection, corrosion-resistant, and ensures long-term stability |
High-power modules (high-current applications) | MC4-Evo2 | Supports up to 69A, reducing power losses |
Existing MC4-based systems requiring compatibility | MC4-Evo2 | Fully compatible with MC4, enabling easy system upgrades |
Small-scale PV projects (residential, commercial rooftops) | MC4 | More cost-effective and easy to install |
Budget-conscious projects requiring mainstream compatibility | MC4 | Economical choice, widely available in the market |
For specific model details, supplier information, or technical specifications, feel free to contact us for expert advice and tailored solutions!
