String combiner boxes for photovoltaic systems

String combiner boxes for photovoltaic systems

It is necessary to use string combiner boxes to provide ideal protection for PV systems against lightning strikes and overvoltages. Our turnkey string combiner boxes, which can be connected immediately, are reliable system solutions that protect the inverter directly from DC and AC voltage inputs. Overvoltage couplings are diverted directly to the ground potential.

More information

Ask a question for additional information about these products

Your advantages

  • All sets in dust- and water-jet-proof housings (IP65)
  • Fast installation and startup with preassembled string combiner boxes
  • Simplified connection of the protective potential conductor with sufficient connection options in the string combiner box
  • Creation of customer-specific solutions at short notice
  • Maintenance-free connection of PV strings with SUNCLIX or Push-in connection technology
  • For all photovoltaic sets with SUNCLIX connection technology, the required connectors are already included as standard
  • Standard-compliant switchgear and controlgear assembly due to the use of DIN EN 61439
Preassembled PV set

Preassembled PV sets reliably protect rooftop systems

String combiner boxes for photovoltaic systems

With its preassembled sets, Phoenix Contact offers reliable system solutions that protect the inverter directly upstream of the DC and AC voltage inputs.

Surge voltage couplings are discharged directly to the ground potential. Due to our coordinated scope of supply, new versions can be made available very quickly.

Example fire department emergency shutdown

Safety during maintenance and in the case of danger

Fire department emergency shutdown and switch disconnector

We offer a fire department emergency shutdown or switch disconnector as well as surge protection in a single device. An emergency switching off switch can be used to disconnect the photovoltaic system remotely. This provides maximum possible safety during maintenance and in the case of danger.

Product example of photovoltaic connectors in use

Easy cabling: the solar connectors are assembled without using special tools

Photovoltaic connectors

To connect the PV strings, the string combiner boxes are equipped with either our SUNCLIX panel feed-throughs or with cable glands on Push-in terminal blocks. SUNCLIX connectors from Phoenix Contact and Push-in terminal blocks combine the advantages of easy installation with reliable and maintenance-free connection.

Further information
Surge protection and PV accessories
String combiner boxes need to be used in order to provide optimum protection for the various parts of rooftop systems against lightning strikes and surge voltages. Phoenix Contact offers an extensive portfolio of various ready-to-install, directly connectable string combiner boxes for your rooftop systems.
View and download the e-paper
Electrician in a PV rooftop system talking to a Phoenix Contact employee who is holding a surge protective device