Feb 07, 2020 · They are available in 'male' and 'female' types built to be snapped together. There are many types of PV connectors, Amphenol, H4, MC3, Tyco Solarlok, PV, the SMK and the MC4. They come in T-, U-, X- or Y- Joints. The MC4 is the most commonly used connector in the solar system industry. Most modern panels are built to use the MC4 connector.