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HISbox® C&I – combiner box for commercial and industrial applications
Commercial and industrial PV systems place precise demands on safety, standard compliance and long-term availability. The HISbox® C&I is configured for each project – ready for immediate use, from planning to commissioning from a single source.
Standard-compliant
The HISbox® C&I is supplied in compliance with IEC 61439-2, with a fireman switch with UVR function integrated as standard. Preset country programs enable fast commissioning.
Configurable
The right solution for every plant: multi-MPPT, single-MPPT with 10, 12, 14 or 16 strings and a monitoring variant. Together, we find the equipment that suits your project.
Durable
The HISbox® C&I is designed for a high return on investment over the entire service life of the plant – protection rating up to IP65, operationally reliable from -20 °C to +55 °C, tested and future-proof.
Fireman switch – because there is no time to lose in an emergency
PV modules generate electricity as long as light falls on them – even in the event of a fire or power failure. DC lines therefore remain live and pose a direct risk to emergency services. The HISbox® C&I integrates the UVR function (230 V AC) as standard. It automatically shuts off the DC voltage, creating the conditions for safe firefighting.
Three shutdown modes: Manually via emergency stop, automatically in the event of a power failure and temperature-controlled in the event of overheating. This provides safety in every emergency situation.
Compatible and low-maintenance: Tested according to EN 60947-3. High-quality components keep maintenance effort low.
Automatic reactivation: After an emergency, the system reactivates automatically as soon as all safety conditions are met.
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Your HISbox® C&I is configured to suit your project. Talk to us about your plant.
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Modular configuration – for every plant constellation
The HISbox® C&I covers the full range of commercial PV systems. In engineering, we rely on proven standard solutions where they make sense and configure for each project where the plant requires it. Here you will find an overview of the most important components.
HDC 1000V Fireman Switch with UVR: Standard variant for C&I: multi-MPPT variant for up to 12 MPPTs, 2 strings per MPPT, 20 A per string, rated current 40 A per MPPT (6-MPPT variant: 30 A). Undervoltage release (UVR) with control voltage 110–240 V AC, SPD type 2 (type 1+2 optional), protection rating IP65.
DC Combiner 1000V Multi-MPPT: For plants with several inverter MPPTs. The basic equipment corresponds to the HDC and is designed for larger rooftop systems.
DC Combiner 1000V Single-MPPT: For central inverter topologies with up to 16 strings and max. 250 A. Optionally with external operating handle (IP65).
DC Combiner Monitoring 1500V with remote operation: For increased monitoring requirements. Hall sensor monitoring for current, voltage and temperature, communication via RS485, LoRa or WiFi, remote opening via remote control.
HNA Grid Protection: Grid and plant protection up to 135 kVA. Preset country programs, LC display and storage of the last 300 grid faults with time stamp.
HISbox Smart Power & Metering: Integrated AC combiner with real-time monitoring and interface for direct marketing. VDE 4105 compliant, automatic and manual operation.
String monitoring (Hall sensor): Can be retrofitted to existing HISbox® infrastructure. Measures current, voltage and temperature per string and communicates via RS485, LoRa or WiFi.
Arc Fault Detection (AFCI): Can optionally be combined with the HISbox® Fireman Switch. Detects arc faults and increases fire protection.
In commercial PV systems, the DC infrastructure is part of the operating building, which is why failures have a direct impact on self-consumption and operating costs. The right combination of protection, monitoring and standard compliance therefore ensures economical operation.
From the box to the cable – DC infrastructure from a single source
The HIKRA® TECH 1500V solar cable is developed for continuous use in commercial PV systems. It is TÜV-certified, UV-stable, suitable for underground laying and designed for a service life of 25 years. The continuous metre marking facilitates installation and simplifies subsequent maintenance work. For larger C&I projects, HISkon+® supplies factory-assembled DC cable harnesses that are cut to the exact length and ready to plug in.
"Strong connections are our speciality – and that starts with the smallest unit. Our HIKRA solar cables are the lifelines of your photovoltaic system. They stand for what defines us: reliable technology that keeps energy flowing."
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You know what plant size you are planning – we will find the right configuration
Experience that counts.
We have been working closely with installers, project managers and operators in the photovoltaic industry for more than 25 years. This experience goes into every HISbox®, from configuration to standard compliance for more than 60 countries.
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Smart monitoring in combiner boxes
Detect problems at an early stage, optimize yields and reduce maintenance costs - intelligent combiner boxes (GAKs) are evolving from simple protection devices to the digital control center of modern PV systems. A development that is fundamentally changing the monitoring of solar parks.
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Safety first
In the solar industry, safety is paramount - especially when it comes to protecting human life. An often overlooked but crucial component is the fireman switch in the combiner box (GAK). It plays a key role in protecting emergency services and securing PV systems in the event of an emergency.
Frequently asked questions about the HISbox® C&I
The earlier we are involved, the better standard compliance, country programs and communication interfaces can be integrated into engineering from the outset. The process leads from the enquiry through engineering support and digital order management to production and then tested delivery ex works.
Yes, the HISbox® C&I infrastructure can be retrofitted. String monitoring based on Hall sensor technology can be installed in existing boxes without replacing the basic infrastructure. Communication takes place via RS485, LoRa or WiFi, depending on the project requirements.
For commercial PV systems, a fireman switch is mandatory depending on the country and building. The UVR function (230 V AC) is integrated as standard in all HISbox® C&I variants. It is tested according to EN 60947-3, works with three shutdown modes and reactivates automatically once the emergency has been resolved.
We supply DC combiners, grid protection (HNA Grid Protection), AC combiners or Smart Power & Metering, as well as solar cables (HIKRA) and optionally pre-assembled cable harnesses (HISkon+®). Everything comes from one engineering and production process. This reduces the number of interfaces, responsibilities are clearly defined and the coordination effort for project managers is reduced.
From planning to commissioning from a single source. Describe your project to us and we will get back to you with a suitable configuration.
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