This single core solar extension cable 6.0mm2 cross section has been specially designed for solar panels to carry high current and have negligible power loss. It comes with waterproof MC4 connectors ("male" on one end, "female" on the other) which can be easily connected to similar MC4-type connectors coming with most solar panels, including Photonic Universe solar panels.
This cable is suitable for all weather conditions including cold and hot temperatures.