Solar module connector | MC4 | 30 A | 1500 V DC | for cable 2.5–10 mm² | IP67 | VECAS MC4-315

Solar module connector | MC4 | 30 A | 1500 V DC | for cable 2.5–10 mm² | IP67 | VECAS MC4-315

MC4-315 is an MC4-standard DC connector, designed for interconnecting solar modules, inverters and batteries in photovoltaic (PV) systems. The connector is rated for 1500 V DC voltage and 30 A continuous current, so it suits both residential and industrial-scale solar power plants. Used outdoors – from roof-mounted modules to ground-mounted PV parks, wherever a sealed, reliable contact is required.

Main point:
In a PV circuit, every connector is a potential point of contact resistance, overheating or moisture ingress, and a failure is often only noticed after a long period of operation under the open sky. MC4-315 addresses this with a sealed Snap-In construction and tin-plated copper contacts: contact resistance stays low (≤ 0.5 mΩ) throughout the service life, and in the mated state IP67 keeps moisture and dust away from the contact surface. It is a standard choice wherever compatibility with the MC4 system of multiple manufacturers is required, rather than a unique connector type suited to only one project.

What makes MC4-315 useful?
The connector allows a safe DC contact to be assembled quickly, without soldering or special assembly tools (apart from the cable terminal crimping pliers), between a module, connecting cable and inverter. Since it is an MC4-standard connector, it is compatible with most manufacturers' MC4-type connectors on the market, making repair, expansion or module replacement easier without recabling the whole string.

• Reliable electrical contact – tin-plated copper contacts keep ≤ 0.5 mΩ resistance even in extreme weather conditions.
• Fast, safe mating – the Snap-In mechanism locks the parts without extra tools or soldering.
• Resistance to UV and weathering – housing material designed for long-term outdoor operation, under the open sky.
• Protection against water and dust (IP67) – the mated contact suits outdoor installations without an additional protective enclosure.
• Compliance with international standards – UL and EC certification confirms safety and quality requirements.
• Designed for direct current – built specifically for DC circuits, not adapted from an AC connector.

• Solar photovoltaic power plants (PV systems) on roofs and on the ground
• Interconnection of solar modules and inverters
• DC power circuit installations
• Mobile energy systems – campers, boats, portable solar generators
• Industrial DC networks
• Connecting battery banks to a PV system's DC side

When installing a 10 kW rooftop solar power plant with several module strings, each module is connected to its neighbour via a pair of MC4-315 connectors, and the string end is routed to the inverter's DC input. Since the system's DC-side operating voltage can reach 1000–1500 V and the current in one string up to 30 A, MC4-315's parameters cover this load without extra safety margin calculation. Once mated outdoors, the IP67 protection allows the connector to remain uncovered under the module frame for the entire service life.

• Before installation, make sure the PV system is disconnected from voltage and the modules are not exposed to direct sunlight.
• Use a cable cross-section from the permitted 2.5–10 mm² range – a different cross-section may not ensure a firm contact.
• Crimp the terminal with pliers designed for the purpose, so contact with the copper surface is even around the whole perimeter.
• When mating the parts, check that a clear Snap-In locking click is heard – only then is IP67 sealing guaranteed.
• Do not mate parts of MC4-type connectors from different manufacturers unless you are certain of their full mutual compatibility.
• When operating outdoors, periodically inspect the connectors for mechanical damage or housing deformation, especially after strong wind or ice.

Quick selection guide

Is MC4-315 suitable for a 1000 V DC system?
Yes – the connector is rated up to 1500 V DC, so it also covers lower-voltage systems up to 1000 V.

What cable cross-section can be used?
From 2.5 mm² to 10 mm², depending on the current and cable length in the specific circuit.

Can it be mated with other manufacturers' MC4 connectors?
The connector is compatible with MC4-standard components, but when mixing parts from different manufacturers, it is recommended to check the exact fit.

Can the connector be left unmated outdoors?
An unmated connector has only IP2X protection, so the cable end should be protected from moisture and dust until mated.

What is the connector's protection class when mated?
IP67 – protection against dust and brief immersion in water.

Is the connector suitable for AC circuits?
No, MC4-315 is designed only for direct current (DC) circuits.

Solar module connector | MC4

MC4-315 is an MC4-standard DC connector, 30 A, 1500 V DC, for 2.5–10 mm² cable, with IP67 protection in the mated state. Used for connecting solar modules, inverters and batteries in photovoltaic systems, mobile energy systems and industrial DC networks, wherever a reliable, sealed, quickly installed contact is required.