DC Combiner Box Photovoltaics
- Error discrimination with a system
- Single-string monitoring for up to 24 inputs
- Electronic DC disconnection: Up to 480 A at 1,500 V DC
- Integrated fault manager with remote access
- Modern communication interfaces: Modbus TCP/IP, RS485, Ethernet, USB
- Robust IP66 sheet steel housing
- Energy supply via PV string with night buffering
- MC4-EVO2 connections and copper busbar outlet
Efficiency, availability and safety - rethought.
With the new Q3 Super Multi Box, we offer an intelligent solution for free-field photovoltaic systems with central inverters. The innovative box not only performs the tasks of a classic DC combiner, but goes far beyond this with its patent-pending fault discrimination technology.
Particularly in large PV systems, a single fault in the string can lead to a complete partial failure - with considerable yield losses and lengthy service calls. The Q3 Super Multi Box provides a remedy here.
Super Multi Box – the smart DC Combiner Box for utility-scale PV systems and solar parks – now with a groundbreaking new feature! 🚀
The Super Multi Box is an intelligent DC combiner box designed for large-scale photovoltaic systems and solar parks. It combines several essential functions in a single compact unit: individual string monitoring, an integrated fireman’s switch, state-of-the-art communication interfaces – and a technological innovation being unveiled for the first time at Intersolar.
Systematic fault discrimination
At the heart of the Super Multi Box lies the PV String Fault Discriminator. In the event of a fault – such as insulation failure or arc detection – all strings in the box are initially disconnected. The system then automatically reconnects each string one by one until the faulty string is identified. This defective string is then permanently isolated, allowing the remaining strings to continue operation.
The result: no complete system failure, no days of fault tracing in the field.
“Insulation faults are not uncommon in ground-mounted systems. This new Q3 technology saves us days of troubleshooting – and that means real cost savings!”
🚨 Integrated fireman’s switch
The integrated DC fireman’s switch enables rapid on-site disconnection, enhancing both fire safety and serviceability. This solution is ideal for PV installations with stringent safety requirements.
The Super Multi Box offers:
🔌 Plug & Play connection via MC4-EVO2 connectors
📶 Support for Modbus and Ethernet communication
🖥️ Remote access and configuration via intuitive GUI software
⚡ T1+T2 surge protection up to 1,500 V DC
📡 Optional communication buffering via LMP battery cells
With its robust construction, clear functional separation, and high degree of integration, the Super Multi Box is aimed at installers, system planners, and operators who value efficiency, safety, and ease of maintenance.
Q3 ENERGIE – Smart DC system engineering, made in Germany.
PV String Fault Discriminator
Individual String Current Monitoring
Integrated Fireman’s Switch
Plug & Play
Monitoring
Combiner up to 24 Strings
Universal Communication Interfaces
Remote Maintenance
T1+T2 Surge Protection
Technical Specifications – Super Multi DC Combiner Box
| Switching principle | |
| Connections | |
| Number of strings | |
| Standards | |
| Enclosure | |
| - - Material | |
| - - IP rating | |
| - - Impact resistance | |
| - - Compliance / Certification | |
| - - Mounting location | |
| - - Dimensions (L x W x D) | Enclosure size variations forthcoming based on the number of connected strings. |
| - - Weight | |
| Voltage | |
| - - Rated insulation voltage | |
| - - Max system voltage | |
| - - Control electronics supply | |
| - - Max string current (Isc) | |
| - - String fuses | |
| Surge protection | |
| - - Category | |
| - - Remote Signalling contact | |
| - - Compliance | |
| Communication | |
| Operating temperature | |
| Humidity | |
| Options | |
PV String Fault Discriminator
– The core feature of the Super Multi Box
Individual String Current Monitoring
– Including additional software-based string protection
COMBINER
Supports up to 24 input strings in a robust steel enclosure, self-powered via DC/DC converter from PV modules
UNIVERSAL COMMUNICATION
Optional communication buffered via LMP battery cell
Fireman’s Switch
Additional disconnect device for emergency, maintenance, or service operations
Plug & Play Install via MC4-EVO2 connectorsation
Fast and straightforward installation
Remote Maintenance
Fully configurable via software
Surge Protection T1+2
Up to 1,500 V DC with additional fuse protection
MONITORING
GUI software for system monitoring, operational data logging, and remote fault diagnostics
Pressemeldungen zu unserer Super Multi Box - Smart DC Combiner
Stringboxen und Generatoranschlusskasten von Q3
Unsere Generatoranschlusskasten sorgen für ein hohes Maß an Sicherheit schon bei der Installation und gewährleisten eine saubere und übersichtliche Verdrahtung (Verstringung) von PV-Modulen auf dem Dach oder im Freifeld. Oft müssen mehrere Strings parallel verschalten werden, um bei vernünftigen Systemspannungen eine geeignete Leistung hin zum Wechselrichter zu transportieren. Die einzelnen Strings werden direkt bei den Modulen in der Stringbox verschalten und mit lediglich zwei Leitungen (Plus und Minus) mit dem Wechselrichtereingang verbunden. Jeder Generatoranschlusskasten enthält standardmäßig ein Druckausgleichselement für einen effektiven Schutz gegen Kondenswasserbildung.
Unser Portfolio im Bereich Anschlusstechnik, Stringboxen, Generatoranschlusskasten (GAK)
Stringbox Simple
extrem niedriger Aufbau, bis 5 Eingänge
Stringbox Easy
extrem kompakt, bis 18 Eingänge
Duo-/Trio-Channel
Stringbox mit galvanisch getrennten Leiterplatten
Stringbox BIG
Generatoranschlusskasten für Großanlagen/Parks
AC Unterverteilung
kundenspezifische Variante mit ÜSS T1+T2
Sonderboxen
kostenoptimiert - nutzenoptimiert
Generatoranschlusskasten "groß"
mit Überspannungsschutz
Generatoranschlusskasten "klein"
mit Überspannungsschutz
Stringbox Chile, DC Sicherungen im Pluspol 15 A/1 kV, ÜSS T2, 4 Polanschlüsse auf Eingangsseite, Federzug 10 mm², Abgangsseite Plus- und Minus-Federzug 35 mm², Einführung über Gummitüllen, allpoliger DC Switch
Stringbox BIG in Kunststoffgehäuse, 16 Strings 15 A, Sicherungen im Pluspol, Strommessung i‘checker 4, gebündelte Strings. ÜSS T2, Fernmeldekontakt, ÜSS 24 VDC Bus, DC Trennschalter 315 A/1 kV
Projektbeispiel REC Rumänien, Stringbox mit Trennklemmen und CU/AL Brücke
ÜSS Box Duo mit 2 ÜSS T1+T2, Sicherungen 15 A im +&- Pol, Eingänge über MC4 Einbaustecker, Ausgänge über Klemmtechnik, Zuführung PE Leiter bis 16 mm² über M20 Membran, Federzugklemme grün/gelb
GAK mit 50 A-Sicherungen und DC-Freischalter
ÜSS Box mit Klemmtechnik und CU/AL Brücke
6x DC-Freischalter in einem Gehäuse
Batterieanschlusskasten
DC-Freischalter 450 A
PV Strangsicherungen
Einzelstringstrommessung
ferngesteuerter DC-Freischalter