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Modular & scalable
The modular design allows tailored configurations for different applications and power ranges. This means combiner boxes can be flexibly adapted and scaled efficiently from residential to commercial and industrial rooftop and ground-mounted plants.
Integrable
HIS combiner boxes integrate seamlessly into existing system concepts and are compatible with all common inverter systems – for maximum design freedom and safe system integration.
Reliable
Manufacturing of the combiner boxes in Germany with high-quality components from European production, controlled supply chains and well-founded, personal advice ensure consistent quality and reliable project delivery.
A combiner box for every plant size
In utility-scale plants, combiner boxes centrally combine strings, protect the DC side against overvoltages and short circuits, and enable efficient monitoring through string monitoring for fast fault localisation.
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You know which plant size you are planning – we find the right configuration
The HISbox product family comprises DC and AC combiner boxes for photovoltaic systems of every scale. From residential to commercial & industrial through to utility-scale projects, HIS offers suitable solutions for combining DC strings and distributing AC power.
DC Combiner Boxes
Fireman Switch: The fire safety switch extends DC combiner boxes with a central safety function for rooftop PV systems. It enables reliable DC disconnection in defined situations and, depending on the version, can also switch off and back on automatically via a motorised disconnector. In an emergency, the DC cables are selectively de-energised so that emergency responders can work safely and risks to people and buildings are effectively minimised.
HDC Disconnect Switches (CTS): As DC disconnect switches for industrial PV systems, HDC Disconnect Switches ensure a standards-compliant DC disconnection and thus make a significant contribution to plant safety. They combine several string outputs. DC circuits can be switched off in a controlled manner, which significantly reduces risks during operation as well as service and maintenance work.
Overvoltage Protection Boxes (SPD): Overvoltage Protection Boxes are PV combiner boxes with integrated DC surge protection at string level. They limit transient overvoltages in a targeted manner and thus reduce the electrical stress on connected components.
Questions about our DC solutions? We are happy to help.
AC Combiner Boxes
Grid & Plant Protection (HNA / HECI): At the interface between the photovoltaic system and the public grid, reliable protection functions are crucial. Grid & Plant Protection systems with HNA technology monitor relevant grid parameters and ensure a standard-compliant shutdown in the event of deviations. This guarantees a safe grid connection and stable plant operation.
SCADA & Weather Stations: Robust measurement data is essential for transparent plant operation. SCADA systems and weather stations capture plant and environmental data in real time and make it centrally available. They form the basis for monitoring, analysis and data-driven operational management.
EMS Boxes: When energy flows are to be actively controlled, EMS boxes are used on the AC side of the plant. They take generation, consumption and grid requirements into account and enable a flexible, demand-oriented mode of operation. This allows efficiency potentials to be specifically exploited.
Backup Boxes: In the event of a grid outage, security of supply becomes especially important. Backup boxes enable a controlled switchover to a backup supply and secure the power supply of critical loads. This keeps operation stable even in exceptional situations.
Coffrets: Clear AC wiring is the basis for a safe and maintenance-friendly plant layout. 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, central power distribution is required. The NSHV bundles feed-ins and outgoing circuits on the AC side and integrates defined switching and protection functions. This creates a scalable and robust AC infrastructure.
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Request nowOur customers and partners
- IP65 (IEC 60529)
- IEC 61439-1
- IEC 61439-2
- EN 61439-2
- VDE-AR-N 4105:2018-11
- VDE-AR-N 4110
Safety for your PV system
HISbox DC combiner systems stand for uncompromising safety. Every box is designed to reliably protect PV systems – in daily operation, during faults, maintenance and in emergencies. With high-quality components, well-thought-out construction and safety modules that can be flexibly added, an all-round protection emerges that is convincing in every project size.
Robust enclosures made of glass-fibre-reinforced polyester (GRP) or polycarbonate – weather-, UV- and impact-resistant
Protection rating up to IP65 and IK08
Pressure-equalisation valves to prevent condensation
Functional earthing terminals
Modular and touch-safe cable glands or PV connectors
Surge protection type 2+3 or type 1+2+3 (integrated or optional depending on the model)
String protection with 10×38 mm or 10×85 mm fuses for protection against reverse currents
Cable glands or PV connectors
Surge protection type 2 or type 1+2 (integrated or optional depending on the model)
String protection with 10×38 mm or 10×85 mm fuses for protection against reverse currents
Monitoring – safety through transparency
Modern PV systems require precise monitoring. The HISbox monitoring variants increase both operational safety and plant availability.
Current measurement in the strings
Busbar voltage and internal temperature in the enclosure
Arc fault detection
Insulation monitoring
On-site display via a built-in LCD screen
Easy access to safety-critical measured values
You know your protection and monitoring requirements? Request the right HISbox solution now.
Request nowOne system, maximum performance
HISbox combiner boxes redefine industrial string combining. Discover the other components of the HIS Renewables system.
Power delivered
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