MC4 Connectors

A connector that latches and needs a tool to release, which is what a roof run wants. Match the type and the maker on both halves; the shape alone is not a guarantee.

Roam Gear Solar MC4 Connectors (Compatible Pair)

Regular price$6⁹⁵

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Roam Gear 15A MC4 Inline Fuse Holder and Spare Fuse

Regular price$16⁹⁵

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Roam Gear 25A MC4 Inline Fuse Holder and Spare Fuse

Regular price$18⁹⁵

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Roam Gear 10A MC4 Inline Replacement Fuse

Regular price$5⁰⁰

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Roam Gear 15A MC4 Inline Replacement Fuse

Regular price$5⁰⁰

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Roam Gear 20A MC4 Inline Replacement Fuse

Regular price$6⁰⁰

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Roam Gear 25A MC4 Inline Replacement Fuse

Regular price$6⁰⁰

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Rekcharge MC4 Crimping Tool

Regular price$40⁰⁰

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Rekcharge Solar Mc4 Connectors (Compatible Pair)

Regular price$5⁰⁰

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MC4 Connectors

Overview

MC4 Connectors Overview

About MC4 Connectors

On a roof, MC4 is the connector that locks.

An Anderson plug pulls apart by hand, which is what you want on a fridge lead. An MC4 clicks together and needs a tool to release, which is what you want on a roof. A connection that lives in sun and wind and vibration for years, that nobody will check, that cannot be allowed to work loose, wants a latch. MC4 has one.

It is also sealed and polarised. Sealed so rain and dust stay out of the contacts. Polarised, so the pairing is one way round by design. The MC4 shape is used by many manufacturers, but the connectors' own maker is clear that connectors of different makes should not be mated, so match the type and manufacturer on both halves rather than trusting that they click together. Check polarity as you terminate; the shape is not a substitute for that.

The parts here are the connector pairs for terminating your own cable, the inline fuse holders that sit in the panel lead and protect the roof run, the replacement fuses for them, and the crimp tool that makes the pin joint properly. MC4 pins need their own die because the barrel is small and the geometry is particular. Pliers do not do it.

Check what is already on your panels and leads, and buy the matching type. A pair that does not quite mate is a connector that arcs.

FAQs

MC4 Connectors FAQs

MC4 vs Anderson plug: Which is better for connector handle?

MC4 connectors are the better choice for permanent outdoor solar wiring because they feature a locking mechanism and a high level of weatherproofing. Anderson plugs are superior for quick disconnect applications such as portable battery boxes or linking accessories where you need to plug and unplug gear frequently.

Using MC4 leads on your roof racks provides a secure connection that will not vibrate loose or fail when exposed to heavy rain and UV light. Anderson plugs are genderless and designed for high current transfer but lack the specialized environmental seals found in MC4 hardware. Many travelers use a combination of both standards to manage their power system.

Check out our range of Anderson Plugs for your accessory links, or browse our Solar Adaptors to bridge the gap between these two standards.

Do I need a special crimping tool for MC4 connectors?

You should use a specialized MC4 crimping tool to maintain a safe and weatherproof connection. Unlike standard pliers or automotive crimpers, a dedicated solar tool is designed to compress the metal terminal around the wire in a specific shape that maximizes contact and fits perfectly inside the plastic housing.

Using the wrong tool can lead to high resistance points that generate heat or cause the wire to pull out of the plug. A proper crimper also helps you seat the terminal correctly to maintain the IP67 waterproof rating of the connector. This is a critical step for preventing moisture from entering your wiring and causing corrosion.

Find the right hardware for a professional finish in our Crimping Tools collection.

Are MC4 solar connectors completely waterproof?

MC4 connectors are IP67 rated, which means they are highly water resistant and can handle heavy rain and splashes. They feature internal rubber seals that lock out moisture and dust when the plugs are fully clicked together. This design is specifically built for permanent installation on caravan roofs and 4WD roof racks.

To maintain this protection, you must make certain the cable glands on the back of the plugs are tightened properly during assembly. While they are built for harsh conditions, they should not be left submerged in pooling water for long periods. Using UV stable cable ties to keep your solar leads off the roof surface helps protect the seals and keeps your power flowing without interruption.

Explore our range of solar hardware to find durable components for your off grid setup.