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Avoid Cross-Connection of Solar Cable Connectors


The generation of safe and clean electrical power relies on high safety standards and high-quality components that guarantee a reliable performance. Stäubli Electrical Connectors over 25 years of experience in producing highly efficient and safe PV Connectors that play a key role in a long-term durable and reliable protection against hazards. For quality and safety reasons, Stäubli dissociates itself from cross-connecting components of 3rd party suppliers, being advertised as “MC4 compatible”. Cross-connection endangers the safety, performance and efficiency of a PV installation and puts at risk operators and installations as well as the return on investment (ROI) and the levelized cost of energy (LCOE). Even renowned test laboratories (e.g., TÜV and UL) cannot confirm the long-term stability of cross-connections.


Stäubli Electrical Connectors assesses the cross-connection of components from different manufacturers as a risk/hazard for safe use. Currently valid PV standards (IEC 60364-7-712:2017; E343181) state that “male and female connectors […] shall be of the same type from the same manufacturer” and that UL certification for connectors only applies if products from the same product family have been mated. Hence, Stäubli products of the MC4 family mated with third-party connectors lose all relevant IEC and UL certification in their end-use application. Furthermore, the law does not regulate liability in the event of damage; expensive court proceedings may be at stake.

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Cross-connection severely endangers the safe operation of a PV plant: mating components of incongruous quality and/or equipped with different core technologies entails various risks and leads to performance losses. Stäubli further disclaims any participation in tests from independent test institutes that are misleading and wrongly indicate compatibility. Stäubli Electrical Connectors considers the efforts from third-party suppliers to verify their connector product by an independent third-party (e. g. TÜV) as Stäubli/MC4 compatible as inappropriate and not beneficial to the PV industry. Stäubli has not recognized any products from third-party suppliers as being compatible with the original MC4 family and does not intend to do so in the future.


Choose Your MC4 Solar Cable Connectors From ECS

ECS stock a wide range of genuine Stäubli Multi Contact (MC4) connecters to suit your PV installation. Available online 24/7 through our Express store, you can purchase on account or cash sale and enjoy real-time pricing and stock checking. And don’t forget about our fast freight-free delivery on orders over $100 (some T’s & C’s apply).

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The Original, Multi Contact (MC4) Solar Cable Connector by Stäubli


MC4 Plugs & Sockets (#2232)
MC4 Plugs & Sockets

MC4 Panel Receptacles (#2233)
MC4 Panel Receptacles

MC4 Tools & Accessories (#2236)
MC4 Tools & Accessories

MC4 Y Branch Plugs & Sockets (#2234)
MC4 Y Branch Plugs & Sockets

MC4 Solar Leads (#1572)
MC4 Solar Leads

MC3 To MC4 Adaptors (#2235)
MC3 To MC4 Adaptors

How to assemble Stäubli MC4 solar power connectors | Assembly Instructions

Stäubli Electrical Connectors, the Solution Provider for the Photovoltaic Industry. Founder of the most widely used and trusted photovoltaic connector worldwide the MC4 and MC3. Since 1996, the MC renewable connector portfolio meets the market needs. The products are globally certified, have Plug and Play System in order to reduce the installation time, they are as well reliable in all environments and efficient due to the MULTILAM technology inside.

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