Wiring For Solar Panels

Proper connection of your solar modules to each other and to other components is crucial to the overall performance of your photovoltaic system.Without proper wiring, power from your solar array may be lost right at the source before it ever gets to your battery bank or inverter. The module interconnects and panel output cables listed below make it very easy to make clean, code-compliant,water-tight connections.

Note: Early on solar panels came with Multi-Contact Solarline 1 (also known as MC3) connectors which have a soft rubber insulator. In 2007, PV manufacturers began switching to Multi-Contact Solarline 2 (also known as MC4) locking connectors to meet future electrical code requirements. We carry both types of connectored cables as well as Tyco type connectos, so please make sure you are choosing the correct cable for your application. Also check out our article "MC Cable Types". Call our knowledgable sales team if you have any questions!

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Subcategories

Product Name ↓ Length Gauge Price
 10 AWG 2x33" Module Interconnect Cable Assemblies   10 AWG 2x33" Module Interconnect Cable Assemblies   33 in   10 AWG   $14.00 
 100' H4 Connector Cable #10 AWG   100' H4 Connector Cable #10 AWG   1200 in   10 AWG   $74.99 
 100' SMK Connector Cable #10 AWG   100' SMK Connector Cable #10 AWG   1200 in   10 AWG   $74.99 
 15' H4 Connector Cable #10 AWG   15' H4 Connector Cable #10 AWG   180 in   10 AWG   $22.89 
 15' SMK Connector Cable #10 AWG   15' SMK Connector Cable #10 AWG   180 in   10 AWG   $24.89 
 30' H4 Connector Cable #10 AWG   30' H4 Connector Cable #10 AWG   360 in   10 AWG   $32.99 
 30' SMK Connector Cable #10 AWG   30' SMK Connector Cable #10 AWG   360 in   10 AWG   $34.99 
 50' H4 Connector Cable #10 AWG   50' H4 Connector Cable #10 AWG   600 in   10 AWG   $47.99 
 50' SMK Connector Cable #10 AWG   50' SMK Connector Cable #10 AWG   600 in   10 AWG   $49.99 
 H4 Disconnect Key for H4 Connector Cable   H4 Disconnect Key for H4 Connector Cable       $11.00 
 H4 to MC4 Array Adapter Set (MF Pair)   H4 to MC4 Array Adapter Set (MF Pair)     10 AWG   $17.49 
 Kyocera 30 Inch Mc4 Pigtail Set for Kc J-Box   Kyocera 30 Inch Mc4 Pigtail Set for Kc J-Box   30 in     $34.99 
 MC Branch Coupler 1 Male to 2 Female Ends   MC Branch Coupler 1 Male to 2 Female Ends       $19.11 
 MC2/MC4 Branch Coupler 1 Female to 2 Male Ends   MC2/MC4 Branch Coupler 1 Female to 2 Male Ends       $18.88 
 MC2/MC4 Branch Coupler 1 Male to 2 Female Ends   MC2/MC4 Branch Coupler 1 Male to 2 Female Ends       $19.13 
 Multi-Contact 100' MC3 Connector Extension #10 AWG   Multi-Contact 100' MC3 Connector Extension #10 AWG   1200 in   10 AWG   $78.30 
 Multi-Contact 100' MC4 Connector Extension #10 AWG   Multi-Contact 100' MC4 Connector Extension #10 AWG   1200 in   10 AWG   $74.99 
 Multi-Contact 120' MC3 Connector Extension #10 AWG   Multi-Contact 120' MC3 Connector Extension #10 AWG   1440 in   10 AWG   $89.80 
 Multi-Contact 120' MC4 Connector Extension #10 AWG   Multi-Contact 120' MC4 Connector Extension #10 AWG   1440 in   10 AWG   $84.99 
 Multi-Contact 15' MC3 Connector Extension #10 AWG   Multi-Contact 15' MC3 Connector Extension #10 AWG   180 in   10 AWG   $23.06 

More Info on Wiring For Solar Panels

Wiring your solar panels to a combiner box. Now that many solar panels come with Multi-contact Solarline connectors, wiring modules in series is as simple as connecting the positive lead of one module to the negative lead of the next module and so on. If you plan on wiring the modules in parallel, you may be confused about what to do with the MC connector leads on the modules since you can't connect positive to positive using only the connectors. Here are two options:

  • Use MC connector cables, one per module. Measure the distance from the module to the combiner box. If it is 3 feet, you'll need a connector that is double that, like the Multi-Contact 6 FT MC3 Connector Extension #10 AWG. Plug the male and female ends of the MC connector in to the corresponding solar module leads. Cut the MC connector cable in half and run the bare ends of the connector to your combiner box. Repeat this process for each solar module. Do not cut the MC connector leads on your solar module! This may void the warranty.
  • Use branch cable couplers, one each MC Branch Cable Coupler F-2M and MC Branch Cable Coupler M-2F for each pair of modules being paralleled.
  • Still have questions? Please give us a call.

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