Q/A

  • What are mc4 connectors?

    Mc4 connectors are electrical connectors used for connecting solar panels in a system. The MC stands for the manufacturer Multi-Contact. The 4 refers to the 4mm diameter of the contact pin. Modern solar modules use mc4 connectors because of their simplicity and ease in installation. In the past, modules were built with a junction box that required an installer to manually attach wires to the terminal posts. This is still sometimes used, but it’s becoming more of rarity. Mc4 connectors, which come in both male and female types, makes it easy to wire your solar array on your own.

  • How do I connect mc4 connectors?

    Connecting mc4 connectors is very simple. First, you’ll want to make sure that no current is flowing. Cover your solar panels to make sure they are not generating any electricity while installing or disconnecting. Then, it’s just a matter of simply aligning the female connector with the male connector and securing. The Renogy solar panel mc4 assembly tool makes connections and disconnections quick and painless.

  • What is the difference between mc3 and mc4 connectors?

    MC3 connectors are a mostly obsolete type of single contact connector. Most new panels use mc4 connectors.

  • How do I disconnect mc4 connectors?

    If you need to disconnect mc4 connectors, use the Renogy solar panel mc4 assembly tool. The mc4 assembly tool is designed to make the assembly and disassembly of connections as easy as possible. This tool can assist in the connections or disconnection of the mc4 connectors from one another or assist in the addition or removal of another mc4 connectors from a bare wire. You simply align the mc4 tool with mc4 connections along the middle, and then press down and pull the mc4 connections away from each other.