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HISbox: The modular combiner box.
Modular & scalable
The modular design allows for precise configurations for different applications and performance areas. This enables combiner boxes to be flexibly adapted and efficiently scaled from private to commercial / industrial rooftop and ground-mounted systems.
Integrable
Combiner boxes from HIS can be seamlessly integrated into existing plant concepts and are compatible with all common inverter systems – for maximum planning freedom and secure system integration.
Reliable
Manufacturing of combiner boxes in Germany with high-quality components from European production, controlled supply chains and expert, personalized advice ensure consistent quality and reliable project implementation.
Combiner box for every system size
In utility scale plants, combiner boxes centrally combine strings, protect the DC side from overvoltages and short circuits, and enable efficient monitoring through string monitoring for quick fault localization.
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You know what system size you are planning - we will find the right configuration
The HISbox product family includes DC and AC combiner boxes for photovoltaic systems of all sizes. From residential to commercial & industrial to utility-scale projects, HIS offers suitable solutions for the merging of DC strings and the distribution of AC power.
DC Combiner Boxes
Fireman Switch: The Fireman Switch expands DC Combiner Boxes with a central safety feature for PV rooftop systems. It allows reliable DC disconnection in defined situations and, depending on the execution, can also automatically switch on and off via a motorized disconnect switch. In case of emergency, the DC lines are specifically de-energized so that emergency personnel can work safely and risks to people and buildings are effectively minimized.
HDC Disconnect Switches (CTS): HDC Disconnect Switches ensure safe DC disconnection within industrial PV systems, thus making a significant contribution to system safety. They consolidate multiple string outputs. DC circuits can be shut down in a controlled manner, significantly reducing risks during operation and maintenance work.
Overvoltage Protection Boxes (SPD): Overvoltage Protection Boxes are PV combiner boxes with overvoltage protection and integrate this directly on the DC side of the system. They target transient voltage spikes and thereby reduce the electrical load on connected components.
Questions about our DC solutions? We are happy to help you.
AC Combiner Boxes
Grid & Plant Protection (HNA / HECI): At the interface between photovoltaic system and public grid, reliable protection functions are crucial. Grid & Plant Protection systems with HNA technology monitor relevant grid parameters and ensure standard-compliant shutdown in case of deviations. This guarantees a secure grid connection and stable plant operation.
SCADA & Weather Stations: For transparent plant operation, reliable measurement data is essential. SCADA systems and weather stations record plant and environmental data in real time and make it centrally available. They form the basis for monitoring, analysis, and data-based operational management.
EMS Boxes: When energy flows need to be actively controlled, EMS Boxes are used on the AC side of the system. They take into account generation, consumption, and grid requirements, enabling flexible, demand-oriented operation. This makes it possible to exploit efficiency potentials in a targeted manner.
Backup Boxes: In the event of a grid failure, supply security becomes particularly important. Backup Boxes allow controlled switchover to an alternative power supply and ensure the power supply to critical consumers. This keeps operations stable even in exceptional situations.
Coffrets: Clear AC cabling is the foundation for safe and maintenance-friendly plant setup. Coffrets support structured cable routing and reliably protect electrical connections. This simplifies installation, service, and long-term operation.
NSHV (Low Voltage Main Distribution): For larger photovoltaic systems, a central power distribution is required. The NSHV consolidates inputs and outputs on the AC side and integrates defined switching and protection functions. This creates a scalable and robust AC infrastructure.
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Technical data and certifications
- IP65 (IEC 60529)
- IEC 61439-1
- IEC 61439-2
- EN 61439-2
- VDE-AR-N 4105:2018-11
- VDE-AR-N 4110
Security for your PV system
HISbox DC combiner systems stand for uncompromising safety. Each box is designed to reliably protect PV systems – during daily operation, in disturbances, maintenance, and emergencies. With high-quality components, well-thought-out construction, and flexibly expandable safety modules, comprehensive protection is created that impresses in every project size.
Robust housings made of glass fibre reinforced polyester (GRP) or polycarbonate – resistant to UV radiation, weathering and impact
High degree of protection up to IP65 and IK08
Pressure equalisation valves to prevent condensation
Functional earth terminals
Modular and touch-proof cable glands or PV connectors
Surge protection type 2+3 or type 1+2+3 (built-in or optional depending on model)
String protection with 10×38 mm or 10×85 mm fuses to prevent reverse currents
Cable glands or PV connectors
Surge protection type 2 or type 1+2 (integrated or optional depending on model)
String protection with 10×38 mm or 10×85 mm fuses to prevent reverse currents
Monitoring – Security through Transparency
Modern PV systems require precise monitoring. The monitoring options of HISbox increase both operational safety and system availability.
String current measurement
Main bus voltage and internal enclosure temperature
Arc fault detection
Insulation monitoring
On-site display via integrated LCD
Easy access to safety-critical measurement values
Do you know your protection and monitoring requirements? Request a suitable HISbox solution now.
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One system, maximum performance
HISbox combiner boxes redefine industrial string connection. Discover the other components of the HIS Connect system.
