The Sealing cap for the sockets on the Port is part of the Solar Join system. The cap serves to seal off sockets that are not used on the Port 2, 3, 4 or T Port. This keeps the inside of the Port waterproof and protected from weather conditions at all times.
The IP44 Solar join system allows you to operate at a maximum distance of 10m between the lamps and the solar panel. This makes it easy to use.