DC Combiner Boxes for photovoltaic systems The DC Combiner Box collects and distributes the string currents from the solar panels. Furthermore, the DC Combiner Box monitors the system performance and protects the individual panels against damage caused by surge voltages.

DC Combiner Box in a solar application

The challenge


Two people in an open-field PV system

Maximum availability

Specialists who design and build photovoltaic systems face the challenge of achieving maximum availability and performance of photovoltaic systems. The important factors here are collecting and distributing string currents, protecting the individual modules against damage from lightning and overvoltage, and monitoring the performance of the system.

The solution


DC Combiner Box application

Tailor-made solution concepts for free-field photovoltaic systems

The DC Combiner Boxes from Phoenix Contact meet these requirements and also feature space-saving housing. Our monitoring system for photovoltaic strings enables you to respond immediately to malfunctions and power losses, even when individual strings fail.

String combiner boxes
Product overview

Gain an overview of our connectable string combiner box product portfolio and find the right DC Combiner Box for your solar park here.

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DC Combiner Box application

Typical structure of our DC Combiner Boxes

Interactive image map: Front view of an example string combiner box
Connection technology
The maintenance-free connection with spring connection technology enables the quick and safe connection of PV strings.
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Connection technology
String monitoring
The DC Combiner Box puts PV string monitoring front and center. It enables the system status to be continuously recorded and the string currents and voltages to be measured. Indirect current measurement using Hall effect technology prevents power losses and the coupling of surge voltages into the monitoring system. The data can be used to alert the system operator to any potential malfunctions as early as possible. This ensures high system availability and optimizes the yield of the power generating system.
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String monitoring
Power supply
DC/DC converters ensure the direct, autonomous supply of power to the string monitoring units within the system. This means that an additional 230 V AC supply is not required.
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Power supply
System protection
Surge protection and fuses are used to protect the string combiner boxes against external influences such as residual currents and lightning. This ensures high system availability.
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System protection
Wireless communication
Inadequate grounding concepts lead to coupling on the signal lines. Wireless communication solutions ensure that monitoring communications are not impaired by such couplings. With their flexible installation, wireless solutions are particularly suitable for retrofit projects.
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Wireless communication

Your advantages

  • Reliability and durability with a temperature-optimized design
  • Low installation and maintenance costs and flexible networking with wireless communication
  • Continuous availability with standardized items in multiple versions in stock
  • Compatible and individual with configuration in accordance with customer requirements

Contact


Group photo of the experts for solar power
Ihre Experten für Solarenergie
Global Industry Management Renewable Energy
We will be happy to support you on your path to a sustainable power supply.
Maintenance personnel with tablet in hand in discussion in a solar park

Partnership and cooperation

Phoenix Contact is a global market leader based in Germany. We are known for producing forward-thinking products and solutions for the comprehensive electrification, networking, and automation of all sectors of the economy and infrastructure. With these innovative products and solutions, we are paving the way to a climate-neutral and sustainable world. Our wide-ranging and innovative product portfolio provides you with future-oriented solutions. Our global network spanning more than 100 countries means that we are always close to your project.

Frequently Asked Questions


Conversation between two people in a solar park
Maintenance personnel with tablet in a solar park
Man in front of screens with Solarworx software library
Control cabinets in the solar park
Conversation between two people in a solar park

We ensure proximity to customers and partners through an international network of sales subsidiaries. At all our locations, our employees are working with a passion for technology and innovation on driving forward toward a sustainable world for everyone. This international presence means that Phoenix Contact DC Combiner Boxes are available globally and with short lead times.

Maintenance personnel with tablet in a solar park

The continuous monitoring of the system status and measurement of the string currents and voltages ensures maximum system availability. This can result in reduced downtimes.

Man in front of screens with Solarworx software library

The data generated by the monitoring devices is transmitted to a central PLCnext Control via RS-485 communication. The Solarworx library also features preprogrammed function blocks for reading the data held by the PLCnext Control. The library contains function blocks for various manufacturers of supported string monitoring devices.

Find out more about inverter communication
Control cabinets in the solar park

The DC Combiner Boxes have various interfaces. Integration into your overall system is therefore flexible. Our industry experts will be happy to advise you on all options.
Electrification, networking, automation: We are your key partner for sector coupling. Find out more about further solutions from Phoenix Contact for monitoring and control in your solar park. Our inspiring solutions for feed-in management, data logging, weather data acquisition, and other facets of photovoltaics enable you to design a sustainable power supply.

Find out more about our solutions for solar power
Solar park control cabinets

How are the DC Combiner Boxes integrated into the solar park?

The DC Combiner Boxes have various interfaces. Integration into your overall system is therefore flexible. Our industry experts will be happy to advise you on all options.
Electrification, networking, automation: We are your key partner for sector coupling. Find out more about further solutions from Phoenix Contact for monitoring and controlling in your solar park. Our inspiring solutions for feed-in management, data logging, weather data acquisition, and other facets of photovoltaics enable you to design a sustainable power supply.

Products


Product overview
Still haven’t found the right product?

Feel free to contact us. We will consult with you to find the ideal solution together.

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