![]() The MC4-PAIRE KIT contains 1 male and 1 female MC4 solar panel connector. To extend the length of the wires of these solar panels for connection to a charge controller, combiner box or grid-connected inverter, an extension wire is required with corresponding Male and Female MC4 Connectors. The Positive (‘+’) wire has a Female MC4 Connector and the Negative (‘-‘) wire has a Male MC4 Connector. In most solar panels, the other end of each wire is terminated with an MC4 connector. One end of each wire is connected to the junction box of the panel. of Positive (‘+’) and Negative (‘-‘) wire. Today, most solar panels come with approximately 3 ft. A better solution is to work obtain written permission from the module manufacturer to replace the factory connectors with connectors to match the MLPE whips.MC4-2 SOLAR PANEL MULTI-CONTACT CONNECTORS EASY AND FAST INSTALLATION OF YOUR SOLAR PANEL WITH MC4-PAIRE CONNECTORS ![]() Adding additional hand-crimped connections to the system will increase the potential points of failure on the roof. If you find yourself in this situation, the use of jumpers (generic on one end, MC4 on the other) is not the best solution. If you choose this strategy only the leads at your string termination would require replacement.Īlthough rare, some electrical inspectors may take issue with generic connectors intermated with MC4 or H4 connectors of popular MLPE devices (see below). The connectors of choice could then be crimped to the module whips. If you prefer to not purchase additional generic PV connectors some manufacturers will provide warranty addenda allowing for the removal of factory PV connectors. These extra connectors will be used to maintain a UL rated connection on your DC home-run. ![]() Your account manager can assist you in identifying and procuring these connectors. If the system employs a standard string inverter the easiest remedy to the connector conundrum is to purchase extra connectors (or pre-wired whips) to match the connectors found on the modules. To maintain a code-compliant UL rated PV connection you have a couple options. Contact your CED Greentech account manager for confirmation. If you see “MC4 compatible” then you are most likely dealing with a generic connector. PV connectors make and model is commonly listed on module data sheets. Many inspectors have begun to notice this discrepancy which forces contractors to find a solution. Although these connectors are fully inter-matable with their MC4 and Amphenol H4 counterparts, in most cases the union between these connectors is NOT a UL rated connection. Furthermore, some string combiners and inverter DC wiring boxes are now offered in pre-wired configuration with PV connectors already in place. Today many module manufacturers have turned to generic PV connectors. In recent years, this required little forethought as the majority of modules came from the factory with common connectors like Staubli MC4 or Amphenol. To maintain code compliance it is imperative that PV connectors are UL rated for interminability. In systems using DC optimizers or microinverters, PV connectors are used to connect the module to the module-level device. PV connectors are also used to form the DC home-run to the inverter. ![]() These connectors are found on the positive and negative module whips and are used to connect modules into series strings. As we have discussed in previous articles, there are several types of PV connectors available today.
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