Technical description
MC4 Connector – Brief Introduction
The MC4 connector is the industry-standard DC connector for photovoltaic (PV) systems, used to connect solar panels in series or parallel circuits. "MC" stands for Multi-Contact (the original manufacturer, now Stäubli), and "4" refers to the 4mm diameter of the contact pin.
Key features:
Tool-free, plug-and-play connection with a snap-lock design
IP67 rated – waterproof and dustproof for outdoor use
Rated current: up to 30A (4mm² copper core); rated voltage: 1000V / 1500V DC
Male (+) and female (−) versions prevent incorrect polarity connection
Flame-retardant (UL94 V-0) and UV-resistant housing
Typical applications: Stringing solar panels, DC inputs of inverters, and combiner boxes in solar power systems.
Related fasteners
T Type Clamp
The T-type fixture is a high-strength fastening accessory specially designed for rooftop photovoltaic installation. Made of premium Zn-Al-Mg steel or stainless steel, it features excellent corrosion resistance, weather resistance and structural stability. With a professional T-shaped force-bearing structure, it provides uniform stress and firm locking, effectively preventing solar modules from shaking, shifting and loosening under wind load. Easy to install and highly versatile, it matches most PV mounting rails, mid clamps and end clamps, widely used for color steel tile rooftops, residential & commercial PV systems, solar sunrooms and carports.
M Type Water Gutter
M-type PV water gutter is a BIPV waterproof & drainage accessory, made of Zn-Al-Mg steel. It is installed under PV panel seams to channel rainwater and avoid roof leakage, compatible with solar clamps and mounting rails.