Before we dive into the comparison between 4mm and 6mm solar cables, let's briefly understand what these cables are and why they are essential in a solar power system. Solar cables are specially designed wires used to connect various components of a solar panel system. They carry electrical energy produced by the solar panels to the inverter and then to your home's electrical system. These cables are subjected to outdoor conditions, including sunlight, temperature fluctuations, and moisture. Hence, they need to be durable and designed to withstand such elements. solar cable 4mm