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: For the past few years, modules have come with Multi-Contact Solarline 1 connectors which have a soft rubber insulator. In 2007, PV manufacturers began switching to Multi-Contact Solarline 2 locking connectors to meet future electrical code requirements. We carry both types of connectored cables, so please make sure you are choosing the correct cable for your application. Call our knowledgable sales team if you have any questions!

Continue reading about How to wire panels in parallel and more!

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Grounding and Wiring Accessories
Grounding and Wiring Accessories

Products

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    Product Name   Length ↓   Gauge   Price 
 MC BRANCH COUPLER F to 2M   MC BRANCH COUPLER F to 2M       $19.95 
 MC BRANCH COUPLER M to 2F   MC BRANCH COUPLER M to 2F       $19.97 
 MC Solarline2 Male to Solarline1 Female   MC Solarline2 Male to Solarline1 Female       $11.60 
 MC2 to MC1 Adapter Kit   MC2 to MC1 Adapter Kit       $21.61 
 Key for MC Solarline 2 Locking Connector   Key for MC Solarline 2 Locking Connector       $10.95 
 MC2 BRANCH COUPLER F to 2M   MC2 BRANCH COUPLER F to 2M       $18.85 
 MC2 BRANCH COUPLER M to 2F   MC2 BRANCH COUPLER M to 2F       $19.80 
 MC Solarline2 Locking Sleeve   MC Solarline2 Locking Sleeve       $2.75 
 Kyocera 20 Inch Mc Pigtail Set for Kc J-Box   Kyocera 20 Inch Mc Pigtail Set for Kc J-Box   20 in     $23.00 
 Kyocera 30 Inch Mc Pigtail Set for Kc J-Box   Kyocera 30 Inch Mc Pigtail Set for Kc J-Box   30 in     $26.40 
 Kyocera 30 Inch Mc4 Pigtail Set for Kc J-Box   Kyocera 30 Inch Mc4 Pigtail Set for Kc J-Box   30 in     $30.99 
 10 AWG 2x33" Module Interconnect Cable Assemblies   10 AWG 2x33" Module Interconnect Cable Assemblies   33 in   10 AWG   $16.58 
 10 AWG 36"-F Module Interconnect Cable Assemblies   10 AWG 36"-F Module Interconnect Cable Assemblies   36 in   10 AWG   $15.12 
 10 AWG 36"-M Module Interconnect Cable Assemblies   10 AWG 36"-M Module Interconnect Cable Assemblies   36 in   10 AWG   $15.12 
 10 AWG 2x39" Module Interconnect Cable Assemblies   10 AWG 2x39" Module Interconnect Cable Assemblies   39 in   10 AWG   $13.11 
 6' MC1 Connector #10 AWG Male/Female   6' MC1 Connector #10 AWG Male/Female   72 in   10 AWG   $22.00 
 6' MC2 Connector #10 AWG Male/Female   6' MC2 Connector #10 AWG Male/Female   72 in   10 AWG   $20.00 
 8' MC1 Connector #10 AWG Male/Female   8' MC1 Connector #10 AWG Male/Female   96 in   10 AWG   $23.00 
 15' MC1 Connector #10 AWG Male/Female   15' MC1 Connector #10 AWG Male/Female   180 in   10 AWG   $26.00 
 15' MC2 Connector #10 AWG Male/Female   15' MC2 Connector #10 AWG Male/Female   180 in   10 AWG   $24.99 

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 6' MC1 Connector #10 AWG Male/Female. 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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