This DC photovoltaic adapter cable pair is designed for direct current (DC) connections between solar PV strings equipped with MC3 and MC4 connectors and devices featuring a cylindrical DC connector, such as inverters, test instruments, or service equipment.

The set consists of two adapter cables:

• One adapter with MC4 male connector

• One adapter with MC3 female connector

Both cables are terminated on the device side with cylindrical DC connectors and are clearly identified by color coding—red for positive (+) and blue for negative (−) polarity—reducing the risk of polarity errors during installation and servicing.

The MC4 connector features an integrated safety locking system and is marked with the warning “STOP / Do not disconnect under load”, ensuring a secure, vibration-resistant, and reliable electrical connection suitable for photovoltaic environments.

These adapter cables are ideal for professional photovoltaic installations, as well as for maintenance, commissioning, testing, and diagnostic activities. They enable compatibility between MC3- and MC4-based systems, commonly found in photovoltaic installations of different generations.

Key Features

• Adapter cable pair for DC photovoltaic systems

• MC3 female and MC4 male to cylindrical DC connectors

• Clear polarity identification (red + / blue −)

• Secure MC4 locking system with safety warning

• Reliable and vibration-resistant connection

• Designed for professional PV use

Typical Applications

• DC-side connection between PV strings and inverters

• Interface with test and measurement equipment

• Maintenance and diagnostic operations

• Compatibility between MC3 and MC4 PV systems