Introduction to and installation of the waterproof Solar connectors
Introduction to and installation of the waterproof mc4 connectors
MC4 Connector Introduction
Solar cell module cable connector is designed for connecting internal and external photovoltaic system modules. The connector adopts internal drum reed, male head, junction box and cable, and PPO material. The shell has strong resistance to aging and ultraviolet resistance; meets the requirements of harsh outdoor environmental conditions, and is connected by inserted and fixed self-locking structure. The female head is fixed with a stable self-locking mechanism, and is perfectly engaged with the MC4. This product has passed the TUV certification
Why use thewaterproof mc4 connectors
Because the photovoltaic system has been operating in extreme temperature changes in extreme cold for a long time. Because the MC4 connector must be able to maintain a stable working performance in such a harsh environment. Not only to withstand high temperature and moisture water but also to touch the safety protection, current through the high current capacity. In addition to the above requirements, low contact resistance is also a relatively important consideration index.
The Mc4 connector parameter
Rated voltage：1000V DC
Rated current：30A ( 4.0mm2 , 6.0mm2)
Test voltage：6kV(50Hz,1min.)
Contact material：Tin-plated Copper Alloy
Contact resistance：≤0.3mΩ
Insulation material：PPO
Locking system：Snap-in
Operating Temp. Range：-40°C to 90°C
Overvoltage category：CAT III
Protection Degree：IP68
Flame class:UL-94-V0
Type of termination:Crimping
Contact system:Stamped
Cable OD range:Ø4.5mm – 7.8mm
How to install thewaterproof mc4 connectors
MC4 is the name of the connection type on all new solar panels, providing an IP67 waterproof and dust proof safe electrical connection. MC4 will not connect with older MC3 type connectors.
The MC4 connectors work best with 4mm and 6mm solar cable.
When you buy any new solar panel (usually over 30 Watts) it will be already fitted with two 500 - 900mm leads with MC4 connectors attached for you to get the power safely out of the solar panel.
You can buy pre cut leads from 2 Metres to 10 Metres, We sell these, but a more efficient way is to buy the cable which you can cut to the exact length you need and then attach MC4 connectors.
