Solar connectors play an important role in solar power systems. Also known as photovoltaic (PV) connectors, they are used to connect solar panels and other solar equipment together. You can connect them to the ends of PV wire — typically via crimping — after which you plug the solar connectors into panels and equipment. Here are some common features of solar connectors.
UV Resistant
Most solar connectors are resistant to ultraviolet (UV) light. Solar power systems, of course, are installed outdoors where they are regularly exposed to direct sunlight. Sunlight consists of powerful UV rays that can degrade unprotected cables and equipment. Fortunately, solar connectors are available in UV-resistant thermoplastics like polyphenylene.
Waterproof
You can rest assured knowing that most solar panels are waterproof. Along with sunlight, solar power systems are regularly exposed to water in the form of rain, condensation and humidity. To ensure a safe and reliable connection, solar connectors are typically waterproof.
Some solar connectors are IP67 rated, whereas others are IP68 rated. The former can withstand being submerged in water up to 1 meter for a limited time, whereas the latter can withstand being submerged in water beyond 1 meter for a limited time.
Positive Locking Mechanism
Many solar connectors have a positive locking mechanism. This feature is designed to prevent accidental disconnection. Even if you tug and pull on a solar connector, it won’t disconnect from the panel or equipment — assuming it has a positive locking mechanism. You can still disconnect them, but you’ll have to use a special key or tool. With a positive locking mechanism, you don’t have to worry about solar connectors accidentally disconnecting and causing electrical arcs or fires.
Strain Relief
Another common feature of solar connectors is strain relief. It typically consists of a compression nut that, when twisted, tightens around the PV wire. Strain relief is designed to protect the PV wire from excessive stress while maintaining a secure contact point. It absorbs mechanical stress so that the PV wire remains secure and intact.
Contact Pin
All solar connectors have a contact pin. It’s a long and thin piece of metal that serves as the contact point. Contact pins are available in male and female versions. The male version is typically thinner, which allows it to fit inside the female version. Regardless, contact pins are designed for high electrical conductivity and low resistance, making them an essential feature of solar connectors.