Shop Solar MC4 Connectors – Waterproof PV Wiring Connectors ▾

Solar MC4 connectors are the industry-standard waterproof electrical connectors used to join solar panel strings and extend DC wiring throughout a PV system. At US Solar Supplier, we carry MC4-compatible connectors, Y-branch connectors, T-connectors, and cable couplers from reputable manufacturers, all rated for the outdoor UV exposure, temperature extremes, and DC voltage levels of residential and commercial solar systems.

Properly specified and installed MC4 connectors ensure watertight, low-resistance electrical connections that maintain system performance and safety for the lifetime of the installation. Our connectors are available in male and female configurations in single and multi-branch formats for string combiner and array wiring applications. Shop solar connectors at US Solar Supplier for competitive wholesale pricing and fast nationwide delivery.