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MC4 Solar connectors and cables

Welcome to MC4 Solar

Welcome to MC4Solar.com

The go-to provider of MC4 solar equipment cables and connectors

We provide quantity discounts and FREE shipping to lower 48 USA 

All MC4 cables are assembled in our Fredericksburg, Texas office by solar professionals. The cable is UL registered high quality 10 AWG 19 strand copper made in the USA. All of our connectors are TUV rated industry standard. MC4 Solar was established to serve both solar industry professionals and DIY green energy users. All prices include FREE shipping in the lower 48 USA. Outside of the USA, please call or e-mail for shipping rates.


Solar Panel Cable and Connectors

You can expect FAST SHIPPING, and Professional SERVICE! We make going green affordable! FREE SHIPPING TO U.S. LOCATIONS!



MC4 connectors are single-contact connectors commonly used for connecting photovoltaic panels. MC4 stands for the manufacturer Multi-Contact and a 4 mm2 contact assembly pin. The MC4 connector is UL rated at 20A and 600V maximum, depending on the conductor size used. Standards efforts in Europe also allow 1000V versions.

While small solar panels used for charging a battery for example, may not require special connectors, larger arrays involve higher currents and voltages, and place special demands on both cables and connectors for safe operation. The MC4 connector incorporates a flexible watertight seal and is supplied as 'male' and 'female' type to minimise the chance of wrong connections.

For a proper seal, MC4s require the usage of a cable with the correct diameter. Normally double-insulated (insulation plus black sheath) and UV resistant (most cables deteriorate if used outdoors without protection from sunlight). Connection is made by use of a special crimping tool.

Application and safety

Constant spring pressure provides reliable low resistance contacts. However, it is very important to never connect or disconnect them under load, even on low-voltage (12-48V) systems. An electric arc may form which can melt and seriously damage contact materials, resulting in high resistance and subsequent overheating. This is partly because DC continues to arc, whereas commonly used AC more readily self-extinguishes at the zero-crossing voltage point. Large arrays of panels are commonly interconnected in series, made of strings of panels generating 17 to 34V each, with overall voltages up to 600V per string.

Interruption requires a special DC circuit breaker which allows to open the circuit without arc damage (120/230V AC switches and circuit breakers are not suited for higher DC voltage applications).



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