AC Combiner Box – Reliable AC Power Consolidation for Demanding PV Systems

Sicherungs-Lasttrennleiste NH00, 3-polig, 160 A (SS100) in einer AC-Combiner-Box für Inverter mit 7 Anschlüssen
AC Combiner Boxes consolidate the power of multiple string inverters safely and efficiently. They reduce cable runs, create clear feed-in points and ensure a reliable, standards-compliant AC infrastructure in medium and large-scale PV systems.
Oliver Glenz
Oliver GlenzGet expert advice now
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Generatoranschlusskasten – HISbox: modular & skalierbar

Configurable

AC Combiner Boxes by HIS are available in several technical variants and can be configured regarding the number of inputs, protection technology and housing to meet the specific requirements of each project.

Generatoranschlusskasten – HISbox: sicher

Safe

NH fuse-switch technology or MCCB circuit breakers reliably consolidate AC power and effectively limit short-circuit, overload and overvoltage risks.

Generatoranschlusskasten – HISbox: langlebig

Durable

Robust GRP enclosures, high protection ratings and high-quality industrial components ensure high availability in daily operation – even under demanding environmental conditions.

AC Combiner Boxes – Reliable AC Power Consolidation for Demanding PV Systems

HISbox AC Combiner Boxes consolidate the power of multiple string inverters and create a safe, structured and standards-compliant AC infrastructure for commercial & industrial systems as well as utility-scale solar parks. They reduce complex cable runs, enable clear feed-in points and ensure high system availability – even with large inverter clusters and demanding operating conditions.

Through modular protection and switching technology such as NH fuse-switch disconnectors or MCCB circuit breakers, HISbox AC Combiners offer a robust safety concept that effectively limits short-circuit, overload and overvoltage risks. High-quality industrial enclosures, tested components and protection ratings up to IP65 ensure durable, reliable operation indoors and outdoors.

As leading industry providers demonstrate, modern AC combiner solutions focus primarily on system availability, installation efficiency and protection functionality. HISbox combines exactly these requirements with a flexible, project-oriented implementation: from safe AC distribution points and optimised installation concepts to the integration of surge protection and standards-compliant grid and plant protection technology.

This creates a resilient AC infrastructure that makes PV projects economical, safe and future-proof.

Oliver Glenz
Oliver Glenz

Request our AC combiner solutions for your PV project now

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Maximum power and protection for large PV systems: For large PV systems and demanding industrial installations, HIS offers AC Combiner Boxes for up to 1000 V AC. These use MCCB circuit breakers that combine high short-circuit capacity with a compact design.

Typical application areas:

  • Utility-scale solar parks

  • Systems with large inverter blocks

  • PV systems with increased grid requirements and high currents


Technical features:

  • Up to 1000 V AC rated voltage

  • MCCB circuit breakers (up to 160 A per input)

  • 2 to 4 AC inputs

  • High short-circuit capacity

  • Optional surge protection Type 1+2

  • UV and ozone resistant GRP enclosures with IP65

Expandable AC System Components

For a complete, consistently safe AC infrastructure. HISbox AC Combiner Boxes can be meaningfully combined with additional AC system components to build a consistently safe, standards-compliant and clearly structured AC infrastructure. These building blocks extend the system functionally and support planning, operation and grid compliance – especially in commercial & industrial and utility-scale projects.

Grid and plant protection units handle the safety monitoring of the grid interface. They continuously check relevant grid parameters and ensure a defined, standards-compliant disconnection in the event of a fault. They thus form the central protection instance between the PV system and the public grid and ensure a stable feed-in point.

Core functions:

  • Monitoring of voltage, frequency and other grid parameters

  • Automatic disconnection according to VDE-AR-N 4105 / 4110

  • Remote-controllable 4-pole disconnection point

  • Storage and evaluation of grid events

Oliver Glenz
Oliver Glenz

Get expert advice on our AC combiner solutions now

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Safety of AC Combiner Boxes

On the AC side of photovoltaic systems, protection and switching technology are the focus. The HISbox AC Combiner Boxes use robust industrial components and meet the requirements of EN/IEC 61439-2 – for safe, reliable operation even at high currents and demanding environmental conditions.

Monitoring and AC Combiner Boxes

While in the DC domain string monitoring is frequently used, monitoring on the AC side focuses primarily on system states and grid parameters. HISbox AC Combiners can be seamlessly integrated into SCADA systems, monitoring platforms or grid protection solutions and provide the necessary information for stable operation.

Oliver Glenz

Planning your AC infrastructure? We support you in selecting the right components

Get in touch
Oliver Glenz – Sales and Division Management
+49 (0) 6068 9314 430sales@his-renewables.com