Roof Cable Management

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It is important that the cables connecting your solar panels on your roof are the proper gauge for safety and efficiency.  It is important that everything on the roof is UV protected and can withstand all types of weather for decades.  AM Solar provides high-quality RV solar cables, cable management, and combiner boxes.  We offer a large variety of plugs, adapters, and connection kits for any RV solar power system.

The proprietary AM Solar combiner box is designed to meet the challenges of the most complicated off-grid solar application just as easily as it can handle wire routes for a simple solar array on a van conversion.  This is the most advanced mobile solar combiner box on the market.

Best Sellers

These are our most popular roof cable management items.

  • AM Solar Roof Combiner Box (C-Box)

    A mobile solar combiner box is what houses cable connections from individual solar panels or strings of solar panels.  It also covers the roof penetration where conductors are fed down to the solar charge controller. This is the culmination of 15 years of...

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  • Zamp Roof Combiner Box (C-Box)

    For small to medium-sized solar-charging systems: UV resistant, low profile, will accommodate a number of connection styles* 5 1/4" W x 4 5/8" D x 1 7/8" H Up to 6GA output cable Up to 4 inputs 2 ATP input plugs 2 knockouts...

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  • Zamp ATP Prep Kit - Male

    Zamp ATP Prep Kit - Male

    This kit allows Zamp panels with ATP connectors to splice onto 10ga cable.

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  • Zamp ATP Prep Kit - Female

    Zamp ATP Prep Kit - Female

    This kit allows Zamp panels with ATP connectors to splice onto 10ga cable.

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  • Roof Wire Transition Kits

    These transition kits contain all the hardware needed to manage your rooftop wire runs from one plug type at the solar modules, to another at the Combiner Box or series pair. These kits do not come with UV protected 10/2 wire. That wire...

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  • Zamp 2 Pole Plug ATP 2 to 1 Parallel

    Zamp 2 Pole Plug, ATP 2 to 1 Parallel

    Zamp two to one ATP parallel combiner cable adapter specifically designed for the Zamp DJ190 panel. AM Solar Part Number: PLUG-ATP-2-1-PARLEL

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  • Zamp 2 Pole Plug ATP 2 to 1 Series

    Zamp 2 Pole Plug, ATP 2 to 1 Series

    Zamp two to one ATP series combiner cable adapter specifically designed for the Zamp DJ190 panel. AM Solar Part Number: PLUG-ATP-2-1-SERIES

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  • Zamp 2 Pole Plug ATP 2 to 1 Series Long

    Zamp 2 Pole Plug, ATP 2 to 1 Series Long

    Zamp two to one ATP series combiner cable adapter specifically designed to series connect to ATP style panels AM Solar Part Number: PLUG-ATP-2-1-LNGSER

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Combiner and Roof Penetration Options

A combiner box houses the parallel connections that are necessary when multiple solar panels are used in a system.  A combiner box also provides an easy access point for future panel additions and is typically located near or over the roof penetration.  The weather tight strain reliefs used in the connections to the combiner boxes come with the SunRunner Panel Kits or can be purchased separately.  With just one or two panels it may make sense to use MC4 connectors and a clamshell to cover the roof penetration.

  • AM Solar Roof Combiner Box (C-Box)

    A mobile solar combiner box is what houses cable connections from individual solar panels or strings of solar panels.  It also covers the roof penetration where conductors are fed down to the solar charge controller. This is the culmination of 15 years of...

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  • MC-4 Comparable T-Branch Connectors

    This connector set combines the MC-4 type cable outputs of two solar panels in parallel.mc

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  • Cable Gland, 2.5” Round, Grey

    Cable Gland, 2.5” Round, Grey

    A waterproof (IPX6 & IPX7 rating) cable routing device with a UV stable Glass Filled ABS plastic housing.  Common applications for this cable gland are to accommodate one of our 10/2 duplex roof cables, or 2 x 10GA PV cables, or 2 x...

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  • Clamshell Roof Penetration Cover

    The clamshell is used on Essential kits to cover a roof penetration when not using a standard combiner box.

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  • Roof Wire Transition Kits

    These transition kits contain all the hardware needed to manage your rooftop wire runs from one plug type at the solar modules, to another at the Combiner Box or series pair. These kits do not come with UV protected 10/2 wire. That wire...

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  • Extra Busbars 21-BUSS

    Extra Busbars

    Add more busbars to your AM Solar V2 combiner box. AM Solar Part Number: 21-BUSS

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  • Zamp 2 Pole Plug, PV 2 to 1

    Zamp two to one combiner cable adapter. This is a parallel connector (amperage increases, voltage maintains). AM Solar Part Number: PLUG-2POLEFLAT-2-1

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  • Zamp Roof Combiner Box (C-Box)

    For small to medium-sized solar-charging systems: UV resistant, low profile, will accommodate a number of connection styles* 5 1/4" W x 4 5/8" D x 1 7/8" H Up to 6GA output cable Up to 4 inputs 2 ATP input plugs 2 knockouts...

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External Receptacles

External Receptacles are ideal for single panel or portable panel systems where the panel isn’t permanently attached.

  • Zamp 2 Pole Plug Roof Wall

    Zamp 2 Pole Plug, Roof/Wall

    Ideal for adding a mobile panel.  This port attached to the external wall or roof of an RV and is compatible with Zamp connectors. AM Solar Part Number:  PLUG-2PF-RW

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  • Zamp 2 Pole Plug, Battery Side

    Zamp 2 Pole Plug, Battery Side

    Splice this connector onto the battery side of factory pre-wire leads or the AM Solar roof cable.  The connector is compatible with Zamp equipment. AM Solar Part Number:  PLUG-2POLEFLAT-BATTSIDE, PLUG-2PF-B

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  • Wall Mount Receptacle for Portable Panels (Male) 8ga

    Wall Mount Receptacle for Portable Panels (Male) 8ga.

    The heavy duty design and locking connection make this receptacle ideal for mounting to the outside of a vehicle for connecting to a portable panel system.  Only mates with Extension Cord Plug for Panel (Female) AM Solar Part Number:  PLUG-PRTBL-BATT-8GA

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  • Zamp Bracketed Solar Port (SAE)

    Zamp Bracketed Solar Port (SAE)

    Zamp’s bracketed SAE solar port is weather resistant and designed to be mounted on a towbar or bumper. Connect it to your battery with the included inline fuse and 12 AWG wire with ring terminals. This port is compatible with any Zamp Solar...

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Panel Cable Plugs

Panel Cable Plugs are ideal for portable panels or panels that aren’t permanently mounted.

  • Zamp 2 Pole Plug, PV Side

    Zamp 2 Pole Plug, PV Side

    Splice this connector onto solar panel leads or the AM Solar roof cable.  The connector is compatible with Zamp pre-wire systems. AM Solar Part Number:  PLUG-2POLEFLAT-PVSIDE

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  • Zamp 15' Extension w/ 2 Pole plugs

    Zamp 15' Extension w/ 2 Pole plugs

    15' extension cable for use with Zamp panels AM Solar Part Number:  CABLE-10GA-2-15EXTNSN

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  • Extension Cord Plug for Panel (Female) 8ga

    Extension Cord Plug for Panel (Female) 8ga.

    The heavy duty design and locking connection make this plug ideal for splicing onto the leads of a portable panel system.  Only mates with Wall Mount Receptacle for Portable Panels (Male) AM Solar Part Number:  PLUG-PRTBL-PANEL-8GA

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Strain Reliefs

Strain reliefs allow cables to enter or exit the combiner box while preserving a weathertight seal. Strain reliefs can be used for the standard 10/2 roof cable, MC4 solar cable or system core cable exiting the combiner box and going down a vent.

  • Roof Wire Harness Acc. Kit

    This kit contains all the hardware needed to manage a 10/2 solar panel cable and connect it into a combiner box. AM Solar Part Number:  92C-ROOF

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  • Liquid Tight Strain Relief for 10/2 cable

    Liquid Tight Strain Relief for 10/2 cable

    This part enables a liquid tight seal for our custom 10/2 roof cable entering a combiner box or a single conductor exiting a combiner box.  Can also be used for 2ga output cables.  Cable Range of .230"-.546" AM Solar Part Number:  STRN-1/2LN

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  • Liquid Tight Strain Relief 1

    Liquid Tight Strain Relief 1/2" for 2 PV wires

    This part enables a liquid tight seal for the positive and negative leads of 10ga. PV wire entering our combiner box from the solar panel.  The weather tight gland has 2 holes which will accommodate wire from .25-.27" in diameter. AM Solar Part...

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  • Liquid Tight Strain Relief for Output Cables

    Liquid Tight Strain Relief for Output Cables

    This part enables a liquid tight seal for our 6ga through 4ga cable exiting a combiner box when not using a roof penetration.  Cable Range of .170"-.450" AM Solar Part Number:  STRN-L-STD

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Roof Wire Splices

Roof cable can be attached to a solar panel by two methods, cut the factory lead(s) off and directly splice to 10/2 roof cable (which may void the solar panel warranty), or keep the MC4 connectors and use additional MC4 connectors to attach to roof cable.

  • Panel Prep Kit

    This kit contains everything you need to attach our 10/2 UV resistant output cable to a standard solar panel.

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  • MC-4-Comparable Pigtail Connector Kit

    Add MC-4-comparable connectors with a simple butt splice and heat shrink. AM Solar Part Number:  93C-MC4PIG

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  • Zamp ATP Prep Kit - Female

    Zamp ATP Prep Kit - Female

    This kit allows Zamp panels with ATP connectors to splice onto 10ga cable.

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  • Zamp ATP Prep Kit - Male

    Zamp ATP Prep Kit - Male

    This kit allows Zamp panels with ATP connectors to splice onto 10ga cable.

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Roof Splice Components

Splices are an alternative to MC4 connectors. The roof wire attachment points keep wire runs neat.

  • Butt Splices

    Butt Splices

    Crimp on butt splices AM Solar Part Number:  SPLICE-10-BUTT-HS SPLICE-14-BUTT-SD SPLICE-18-BUTT-HS

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  • Wire Nut Kit

    This kit is used when connecting the AC cables in a Magnum inverter system. AM Solar Part Number:  92C-WNUT

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  • Roof Wire Attachment Point

    Use multiple Roof Wire Attachment Points to secure the 10/2 cable between your Solar Panel and the Combiner Box.  Once in place, bury the assembly in Dicor sealant to protect it from the elements. What you get: 1x Wire tie base with VHB...

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Roof Cable

Roof wire comes in two varieties, the round cable for entering combiner boxes and the dual cables for smaller systems using clamshells. Remember: Black is Positive and White is Negative.

  • Roof Wire - AMS Custom 10ga Duplex

    Custom designed for AM Solar with a UV resistant jacket and a round profile that creates a tight seal through a liquid tight strain relief, this cable goes from solar panels to the combiner box. Price is per foot.

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  • 10ga PV Black Wire

    10ga PV Black Wire

    Used to make MC-4 extension cable from solar panels to a combiner box or charge controller.  Sunlight & moisture resistant, flexible (19 copper strands), .265” diameter. Sold as black wire by the foot. AM Solar Part Number:  CABLE-10GA-PV1-BLK

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Roof Cable Management: Frequently Asked Questions

  • What is roof cable management for RV solar?

Roof cable management for RV solar refers to the organization and securing of electrical cables on the roof of a recreational vehicle (RV), where solar panels are installed. This process ensures that cables are neatly arranged and protected from environmental damage, reducing the risk of electrical faults. Effective cable management also improves the aesthetic appeal of the solar installation and makes maintenance easier.

  • What is the cable requirement for RV solar panels? 

The cable requirement for RV solar panels primarily depends on the system’s voltage and current, as well as the distance between the solar panels, charge controller, and battery bank. Typically, larger gauge wires are necessary for higher current or longer runs to minimize voltage drop and ensure efficient power transfer. It’s essential to use UV-resistant, weatherproof cables specifically designed for outdoor use and solar applications to withstand environmental conditions and ensure safety and durability.

  • What cable is recommended for RV solar panels? 

For RV solar panels, it is recommended to use photovoltaic (PV) wire or cable that is rated for outdoor use, UV resistant, and capable of handling the expected current and voltage of the solar system. This typically includes multi-stranded copper wire with a thick insulation layer, often specified as 10 AWG (American Wire Gauge) or larger, depending on the system’s size and the distance between components. The cable should also meet relevant electrical standards, such as UL 4703 for PV wire, to ensure safety, efficiency, and durability in various environmental conditions.

  • How can I protect the cables from UV damage?

To protect cables from UV damage, use UV-resistant cable ties and conduits that are specifically designed to withstand prolonged exposure to sunlight. Applying a protective sleeving over the cables can also provide an additional layer of UV protection. Regularly inspecting the cables for signs of wear and replacing any damaged components promptly can further extend the lifespan of your RV solar system.

  • What are the best practices for routing cables on an RV roof?

Best practices for routing cables on an RV roof include planning the shortest and most direct path to minimize cable length, using conduits to protect cables from environmental exposure, and securing cables at regular intervals to prevent sagging or movement. It’s also important to avoid sharp bends that could damage the cables and to keep cables away from sharp edges or moving parts on the roof. Ensuring there’s enough slack for thermal expansion but not so much that cables become loose is also crucial.

  • What are the consequences of poor cable management in RV solar systems?

Poor cable management can lead to a range of issues, including reduced efficiency of the solar system due to loose or damaged connections, increased risk of electrical fires from short circuits, and potential damage to the RV’s roof or solar panels from improperly secured cables. Additionally, exposed or dangling cables can present a tripping hazard and detract from the appearance of your RV.

  • How does cable management affect the performance of RV solar systems?

Proper cable management ensures that electrical connections between solar panels, charge controllers, and batteries are secure and efficient, reducing energy loss and improving the overall performance of the system. It prevents potential voltage drops and power losses that can occur with loose or damaged cables, ensuring that the solar system operates at optimal efficiency.

  • How do you protect solar panel wires?

To protect solar panel wires, it’s crucial to use conduit (either rigid or flexible) that shields the cables from physical damage and weather exposure. UV-resistant cable ties and clips can secure the wiring to the solar panel frame or mounting structure, preventing movement that could lead to wear. Additionally, ensuring that all wiring is correctly sized, insulated, and installed with proper connectors minimizes the risk of electrical faults and increases the system’s longevity.

  • How do you run solar panel cables through a roof? 

To run solar panel cables through a roof, first, identify the most direct route to the interior connection point, keeping the distance short to minimize voltage drop. Use a waterproof cable gland or a roof entry plate to seal the penetration point, ensuring it is watertight and UV-resistant to protect against water leaks and environmental damage. Finally, secure the cables inside conduit for added protection as they run from the roof to the system’s charge controller or battery bank, using appropriate fasteners to keep the installation neat and safe.

  • Should I wire my RV solar panels in series or parallel? 

Whether to wire RV solar panels in series or parallel depends on your system’s voltage requirements and shading conditions. Wiring panels in series increases the voltage while keeping the current constant, which is beneficial for systems with a higher voltage requirement and minimal shading. Conversely, wiring panels in parallel maintains the voltage but increases the current, making it suitable for systems that experience partial shading, as it minimizes the impact of reduced output from one or more panels.

  • Temperature Sensor for BMV-712

    Support from AMSolar is definitely 5 stars. 1st line of support for Victron equipment provided through distributors. AMSolar likely one of the best when it comes to RVs.

    Tom B

  • Zamp 2 Pole Plug, PV Side

    AM Solar is my “go to” website and store for all my solar needs. They provide technical advice to help ensure you are choosing the correct components. Their parts and connectors are high quality and come with heat shrink cabling to ensure a water tight connection.

    Bryan S

  • Liquid Tight Strain Relief for 10/2 cable

    Tight fit on the cables (my 10 AWG cables have extra thick insulation so it was harder to get the wire in but it did work!

    Bob S

  • VE SmartSolar MPPT 150/85-Tr VE.Can

    Hands down the best source for your RV solar needs. From the very knowledgeable CSR who answered the phone to the solar technician. They reviewed my current system then gave recommendations for improvements.

    Ken I

  • Zamp ATP Prep Kit – Male

    This is a nice kit to have. Everything needed to attach your panel to the zamp box. Very slick. Highly recommend.

    Steve S

  • AM Solar Roof Combiner Box (C-Box)

    Well layed out and easy access for running wires inside. The top of the box has a seal and overlays the bottom half giving good moisture control. This new version is greatly improved.

    Pamela D

  • Dicor Sealant

    I visit a lot of industrial manufacturing and assembly facilities in my job as an environmental engineer. Sometimes it evident that a facility has an organized mind at work setting things up. I get that feeling with AM Solar. Keep up the good work guys.

    Dan M

  • Dicor Sealant

    I enjoy doing business with AM Solar. All the employees have been there a long time. They know and use the products the sell. They are knowledgeable and very helpful. They are the first company I turn to for my Airstream solar needs.

    Keith W

  • VHB Tape, two 5″ Strips

    I enjoy doing business with AM Solar. All the employees have been there a long time. They know and use the products the sell. They are knowledgable and very helpful. They are the first company I turn to for my Airstream solar needs.

    Keith W

  • TEROSON MS 5510 Sealant (legacy)

    This is the 2nd large order I have made from AM Solar. They are absolutely the best. Garret went above and beyond helping me, a do it yourselfer, know what I needed to buy. The kits are especially helpful with all the small accessories.

    Scott M

  • TEROSON MS 5510 Sealant (legacy)

    I enjoy doing business with AM Solar. All the employees have been there a long time. They know and use the products the sell. They are knowledgeable and very helpful. They are the first company I turn to for my Airstream solar needs.

    Keith W

  • Roof Wire Harness Acc. Kit

    I enjoy doing business with AM Solar. All the employees have been there a long time. They know and use the products the sell. They are knowledgeable and very helpful. They are the first company I turn to for my Airstream solar needs.

    Keith W