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Custom Marine Products provides most electrical components needed to install a complete solar system including MPPT controllers and DuoRacer Dual Output Series listed on other pages.
Note: we carry wire with MC4 connectors already installed in 50 foot and 60 foot sections.
Complete marine solar system wiring diagram
Complete Solar System
#10 (or #8) AWG Marine Grade PV Wire
​#10 (or #8) AWG Marine Grade PV Wire
​MC4 Solar Line Connectors
​MC4 Solar Line Connectors
MC4 T-branch Connectors 2 to 1
MC4 T-branch Connectors 3 to 1
MC4 T-branch Connectors

​#10 (#8 too, call us) AWG Marine Grade PV Wire

​#10 AWG Marine Grade PV Wire on a spool
​The proper wire from the solar panels to the controller and the controller to the batteries is important to minimize voltage drop and thus obtain maximum performance from your solar panel.  Our wire is made for the marine environment and will provide optimal power throughput with minimal voltage drop.  We install MC4 connectors on the wire so no special tools will be required for installation.
Marine Grade PV Wire Specifications:
Conductor: Stranded Tined Copper (
84 Strands)
Insulation: Halogen free cross linked polyolefin
Sheath: Halogen free cross linked polyolefin
Nominal Cross-Section: 6mm²
Rated Temperature: -40~﹢90℃
Rated Voltage: DC:1.8kV --AC:0.6/1kV
Finished cable O.D. 6.37 ±0.1mm
Conductor resistance(20℃):≤3.39Ω /km
Rated Current: 25~32A
Weathering Resistance: UV
Burning Behavior: (IEC60332-1)
Wire Diameter:  #10   .25 in. with sheath  (6mm)
                           #8     .4 in. with sheath   (10mm)


Special Order Per Foot Available

Picture

​MC4 Solar Line Connectors

Our solar panels are factory wired with one meter long pigtails and waterproof  MC4 solar connectors.  Thus, you will need a pair of connectors to connect the wire to the solar panel.  Upon request, we will install the connectors to the wire ordered so no tools will be required.
​Rated voltage: DC 1000V
Junction temperature current:16A
Contact resistance:<0.3mΩ
Safety class: class Ⅱ
Waterproof grade: IP 65
Temperature range :-40℃~+85℃
Cable standard: 2.5/4/6mm²
Flame retardant grade: UL94-V0
Insulation material: PPO
Composite contact material: Copper, Tin Plated

​MC4 Compatible Line Connectors

​One male and one female connector for standard solar wire.  Can be pre-installed on the wire ordered upon request.
Price per pair

MC4 T-branch Connectors

MC4 T-branch connectors are used to wire multiple panels in parallel.  We offer 2-1, 3-1 and 4-1 T-branch connectors.  With these waterproof connectors, it is easy to plug the panels together with no special wiring, junction boxes or tools. 

Shop All Wire and MC4 Connectors
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Efficiently Powering Your Vessel/Van. Call/email/chat any time, we're happy to help you work through designing your solar system.
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Call 773-965-2546 or email [email protected]
Article On How To Size Your Solar Panels For Your Boat
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  • Home
  • All Marine Solar Panels
    • All Marine Solar Panels
    • Flexible Marine Solar Panels >
      • Flexible Marine Solar Panels
      • Flexible Panel Bimini Solar System Kits
      • Flexible Solar Panel Mounting Kits
    • Semi-Rigid Walk On Marine Solar Panels >
      • Semi-Rigid Walk On Marine Solar Panels
      • Semi-rigid Solar System Kits
      • Semi-rigid Panel Mounting System
    • Rigid Marine Solar Panels >
      • Rigid Panel Specifications
      • Rigid Solar System Kits
      • Mounting System - Top Of Pole
    • Van Solar Panels
    • Stern Rail Mounted Solar Panels
    • Discounted Solar Panels
    • Portable Solar Panels
    • Shop Our Store
  • Products
    • All Marine Solar Panels
    • LiFePO4 Lithium Batteries >
      • LiFePO4 Lithium Batteries
      • Lithium Trolling Motor Battery
      • Mobility Scooter Batteries
      • Portable Power Stations
    • Solar Controllers >
      • Victron MPPT Controllers
      • DuoRacer Dual Output Series
    • Accessories >
      • Wire & MC4 Connectors
      • Outboard Motor Lifting Crane >
        • Lift Crane Features and Specs
      • Solar Water Heating System For Boats
    • Victron Energy Products >
      • Victron MPPT Controllers
      • Victron Batteries
      • Victron Electrical Components
      • Inverters and Inverter Chargers
    • Shop Our Store
  • Reviews
    • Reviews
    • Gallery of Installations
  • Handy Info
    • System Design
    • Solar System Installation Pointers
    • Manuals & Information
  • Support
    • FAQ
    • Troubleshooting
    • Contact Us
    • Solar System Installers
    • Battery Exchange Plus
    • Handy Products We Don't Carry
    • Freight Forwarders for International Shipping
    • About us
    • Call (248)453-2433
    • Return Policy
    • Shipping Rates
  • Blog
  • Shop Our Store