MC4 Connectors

MC4 connectors are single-contact electrical connectors commonly used for connecting solar panels. The MC in MC4 stands for the manufacturer Multi-Contact (now Stäubli Electrical Connectors) and the 4 for the 4 mm diameter contact pin. MC4s allow strings of panels to be easily constructed by pushing the connectors from adjacent panels together by hand, but require a tool to disconnect them to ensure they do not accidentally disconnect when the cables are pulled. The MC4 and compatible products are universal in the solar market today, equipping almost all solar panels produced since about 2011.

MC4 connectors are used in the solar panel industry. They are IP67 rated and you will need one per wire (i.e. a pair for +/-).

Available for cable sizes:

8AWG
10AWG
12AWG
14AWG

IP67 Rated Panel mount connector available.

Jaycar part numbers PS5100 & PS5102.

Tools

Rhino MC4 Solar Crimping Tool
MC Crimper PV-CZM
Spanner PV-MS
Test Pin PV-PST
Socket Wrench Insert PV-WZ-AD/GWD
Socket Wrench Insert PV-SSE-AD4

MC4 Crimper