An MC4 connector is a type of connector that is often used in photovoltaics (PV) to connect solar panels. "MC" stands for "Multi-Contact" and the "4" refers to the diameter of the pin in millimetres used in these connectors. These connectors are specially designed for use in solar power systems and provide a secure, waterproof connection between the solar panels and between the panels and other components of the system, such as the inverter or charge controller.
MC4 connectors are known to provide very good electrical conductivity and are resistant to the harsh environments they are typically exposed to, such as extreme temperatures and humidity. Their design allows for easy and quick installation, making them a preferred choice for many solar installations. Another advantage of MC4 connectors is that they are reverse polarity protected. This means that they cannot be connected incorrectly, which increases safety during installation.
For LILIE solar panels, compatible with item no. 322/885.