{"id":7519,"date":"2026-01-28T17:49:30","date_gmt":"2026-01-28T16:49:30","guid":{"rendered":"https:\/\/q3-energie.de\/pv-connection-technology-products-firefighter-switches-generator-junction-boxes-ac-dc-boxes\/qfire-big-firefighter-switch\/"},"modified":"2026-07-10T08:53:49","modified_gmt":"2026-07-10T06:53:49","slug":"qfire-big-pv-firefighter-safety-switch","status":"publish","type":"page","link":"https:\/\/q3-energie.de\/en\/products\/qfire-big-pv-firefighter-safety-switch\/","title":{"rendered":"QFire BIG Firefighter Switch"},"content":{"rendered":"\n
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Feuerwehrschalter QFire BIG f\u00fcr gro\u00dfe PV-Anlagen<\/h1>\n\n\n\n
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Generatornahe Abschaltung mehrerer PV-Strings \u2013 projektspezifisch geplant, galvanisch getrennt nach IEC 60947-3.<\/strong><\/h3>\n\n\n\n
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Modularer Systemaufbau \u2192<\/a><\/div>\n\n\n\n
QFire BIG Steuerbox f\u00fcr gro\u00dfe PV-Anlagen \u2192<\/a><\/div>\n\n\n\n
QFire BIG Schaltbox DC-Abschaltung \u2192<\/a><\/div>\n\n\n\n
QFire projektspezifisch statt Standardl\u00f6sung \u2192<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
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String-Level Remote DC Disconnection for Large PV Systems<\/h2>\n\n
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QFire BIG ist eine stringbasierte, fernsteuerbare DC-Trennl\u00f6sung f\u00fcr gewerbliche und industrielle PV-Anlagen im IEC-Umfeld. <\/strong><\/p>\n\n\n\n

Das System ist f\u00fcr Aufdachanlagen, Industriegeb\u00e4ude, Logistikd\u00e4cher und komplexe Photovoltaikanlagen ausgelegt, bei denen mehrere PV-Strings, lange DC-Leitungswege oder mehrere Generatorfelder sicher abgeschaltet werden m\u00fcssen.<\/p>\n\n\n\n

Die QFire BIG Schaltboxen werden generatornah installiert und trennen die angeschlossenen PV-Strings galvanisch nach IEC 60947-3. Je nach Projekt k\u00f6nnen bis zu 24 PV-Strings in einer Schaltbox verarbeitet werden. Die Auslegung erfolgt passend zur Anlage \u2013 mit Blick auf Stringanzahl, Systemspannung, Stringstrom, Dachstruktur, Leitungsf\u00fchrung und gew\u00fcnschtes Abschaltkonzept.<\/p>\n\n\n\n

Zus\u00e4tzlich kann QFire BIG projektspezifisch in ein AC-seitiges Abschaltkonzept eingebunden werden. \u00dcber den Statuskontakt der QFire Steuerbox lassen sich externe Komponenten wie NA-Schutz, Wechselrichter-Freigabe oder bauseitige Sch\u00fctzsteuerungen ansteuern. So k\u00f6nnen DC-seitige Generatorfreischaltung und AC-seitige Abschaltlogik bei gro\u00dfen PV-Anlagen gemeinsam geplant werden.<\/p>\n\n\n\n

QFire BIG ist kein Moduloptimierer und keine klassische Rapid-Shutdown-L\u00f6sung auf Modulebene. Der Fokus liegt nicht auf Leistungsoptimierung am einzelnen Modul, sondern auf der sicheren DC-Stringabschaltung und Generatorfreischaltung f\u00fcr professionelle PV-Anlagen \u2013 zum Beispiel im Brandfall, bei Wartungsarbeiten oder im Serviceeinsatz.

Dank zentraler Steuerbox, projektspezifischen DC-Schaltboxen, der optionalen Clusterl\u00f6sung und externer Not-Aus-Anbindung l\u00e4sst sich QFire BIG flexibel in unterschiedlichste Anlagenkonzepte integrieren. Das System eignet sich insbesondere f\u00fcr:<\/p>\n<\/div>\n\n\n\n

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QFire BIG auf einen Blick<\/h3>\n\n\n\n
Anwendung<\/strong><\/td>Kundenspezifische Anschlussboxen<\/td><\/tr>
Funktion<\/strong><\/td>DC-Stringabschaltung \/ PV-Generatorfreischaltung<\/td><\/tr>
Trennung<\/strong><\/td>galvanisch nach IEC 60947-3<\/td><\/tr>
Systemspannung<\/strong><\/td>bis 1.500 V DC<\/td><\/tr>
Stringstrom<\/strong><\/td>bis 20 A Isc pro String<\/td><\/tr>
Stringanzahl<\/strong><\/td>
bis 24 PV-Strings pro Schaltbox<\/td><\/tr>
Erweiterungen<\/strong><\/td>Not-Aus, Schl\u00fcsselschalter, Brandmeldeanlage, Statuskontakt, SPD, Sicherungen, Cluster, Einbindung in AC-seitige Abschaltkonzepte<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n
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Large Industrial and Commercial Roofs<\/strong><\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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Multiple Roof Areas<\/strong><\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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Expandable PV Projects<\/strong><\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n
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Multiple Inverters & MPP Trackers<\/strong><\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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Complex System Structures<\/strong><\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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Increased Safety Requirements<\/strong><\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n
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The modular system architecture is particularly suitable for complex roof structures, multiple generator fields, and large PV capacities with many strings. Depending on system size, switching units for 2 to 24 strings are available \u2013 with system voltages up to 1,500 V DC and up to 20 A per string. <\/p>\n\n\n\n

For extensive sites, multiple QFire systems can be controlled together via the QFire Cluster Control Box. This allows central disconnection of multiple buildings or separate generator fields. <\/p>\n\n\n\n

Surge protection, external emergency stop buttons, key switches, status contacts, and online monitoring via QFire.LIVE are optionally available.<\/p>\n<\/div>\n<\/div>\n\n

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QFire BIG is a firefighter switch for large PV systems with multiple generator fields, complex roof structures, and high safety requirements.<\/h3>\n<\/div>\n<\/div>\n\n
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QFire BIG in PV System Planning<\/h2>\n\n
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Which PV firefighter switch is suitable for commercial PV systems?<\/h3>\n\n\n\n
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In commercial and industrial PV systems, a simple DC disconnect switch at the inverter is often not sufficient, especially when long DC cable routes, multiple roof areas or specific requirements from the fire safety concept have to be considered. The key points are where the PV strings are disconnected, which voltages and currents are present, and how the shutdown should be triggered in an emergency. <\/p>\n\n\n\n

QFire BIG is designed for exactly these types of systems. The switch box is installed close to the PV generator and disconnects the connected PV strings by galvanic isolation according to IEC 60947-3. This allows the DC cables from the switch box towards the inverter to be disconnected in a controlled way \u2013 manually via the control box, via external emergency stop or key switches, via a fire alarm system or, depending on the system design, AC-coupled in case of grid failure. <\/p>\n\n\n\n

For planners and installers, the important point is this: QFire BIG is not treated as a standard off-the-shelf device, but is configured project-specifically according to the number of strings, roof structure, cable routing, protection concept and required accessories.<\/p>\n<\/div>\n\n\n\n

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What is needed for DC string disconnection in large PV systems?<\/h3>\n\n\n\n
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In large PV systems, DC string disconnection should be considered early in the planning phase. The most relevant factors are the maximum DC system voltage, the short-circuit current per string, the number of strings, the allocation to MPPTs, the cable routes from the PV generator to the inverter and the requirements from the fire safety concept. <\/p>\n\n\n\n

QFire BIG is configured precisely for these conditions. Depending on the project, several strings can be combined in one switch box and disconnected close to the generator. Optional components such as surge protection, PV fuses, status contacts, external shutdown points or cluster solutions for multiple roof areas can be integrated. <\/p>\n\n\n\n

The aim is not to place as many components as possible somewhere in the system, but to create a clear and serviceable DC structure: traceable string routing, a defined disconnection point, clear status indication and a solution that fits the actual PV system.<\/p>\n<\/div>\n\n\n\n

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How can multiple PV strings be disconnected safely?<\/h3>\n\n\n\n
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Multiple PV strings are best disconnected at the point where they are routed from the generator towards the building or inverter. This is exactly where QFire BIG is used. The switch box is installed close to the generator and disconnects the connected DC string cables by galvanic isolation. <\/p>\n\n\n\n

Depending on the configuration, several PV strings can be handled in one QFire BIG switch box. This makes it possible to create a structured shutdown concept even for larger rooftop systems, without having to treat every single string with a separate standalone solution. Operation is carried out centrally via the control box or via integrated external shutdown points. <\/p>\n\n\n\n

For large systems with several building sections or roof areas, the shutdown concept can also be planned using cluster technology. This keeps operation clear and manageable, even when the DC structure of the PV system is more complex. <\/p>\n<\/div>\n<\/div>\n\n

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Combining DC and AC shutdown in the system concept<\/h2>\n<\/div>\n<\/div>\n\n\n\n
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In large PV systems, industrial projects and megawatt installations, the shutdown concept often has to be considered as a complete system. QFire BIG disconnects the PV strings on the DC side close to the generator by galvanic isolation according to IEC 60947-3. In addition, the status contact of the QFire control box can be used project-specifically to integrate external AC-side components \u2013 for example a grid and system protection relay, an inverter enable signal or a site-specific contactor control. <\/p>\n\n\n\n

This is particularly relevant for large rooftop systems, installations with several inverters, hybrid systems with battery storage or projects with special requirements regarding fire safety, grid connection and operational safety.<\/p>\n<\/div>\n\n\n\n

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More information on combined DC and AC-side shutdown can be found in our technical explanation of QFire PV generator disconnection.<\/p>\n\n\n\n

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DC and AC-side shutdown with QFire \u2013 technically explained \u2192<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n
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Modular System Design of Generator Disconnection for Large PV Systems and Rooftop Installations<\/h2>\n\n
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QFire BIG enables galvanic isolation of PV strings between the generator field and inverter. Typical components are: <\/p>\n\n\n\n

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Separation of control [2] and DC switch boxes<\/strong> [1]<\/strong><\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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Expandable through additional switch boxes<\/strong><\/strong><\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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Integration of fire alarm system and\/or external emergency stop button [3]<\/strong><\/strong><\/strong><\/strong><\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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Central or cluster-based disconnection <\/strong><\/strong><\/strong><\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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The QFire BIG system has a modular design and consists of a central control box, optional cluster control boxes, and DC switch boxes for up to 24 strings per box. The switch boxes are custom-built and can optionally be equipped with surge protection and fuses. <\/p>\n\n\n\n

Optional components are:<\/strong>\u25a0 Fire alarm system connection\u25a0 Integrated surge protection\u25a0 Integrated fuses in positive and\/or negative pole\u25a0 External emergency stop button\u25a0 Cluster technology for multiple roof areas\u25a0 Online monitoring\u25a0 Delay circuit (time-delayed disconnection of large systems)<\/p>\n<\/div>\n\n\n\n

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In case of disconnection, all strings are galvanically isolated so that the lines from the installation location of the firefighter switch toward the inverter become de-energized.This separation of control and switching function enables flexible adaptation to system size, roof structure, and safety requirements.<\/strong><\/h3>\n<\/div>\n<\/div>\n\n
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Galvanische Trennung der DC-Strings<\/h2>\n\n\n\n
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Der QFire Feuerwehrschalter trennt im Ausl\u00f6sefall alle angeschlossenen PV-Strings galvanisch und zweipolig nach IEC 60947-3. Dadurch werden Plus- und Minusleiter jedes Strings zuverl\u00e4ssig vom Wechselrichter getrennt \u2013 f\u00fcr maximale Sicherheit im Brand- und Einsatzfall.<\/p>\n\n\n\n

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Klare Abgrenzung zu Motorschalter-L\u00f6sungen<\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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Zweipolige Trennung von Plus und Minus<\/strong><\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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sichere Unterbrechung der DC-Verbindung<\/strong><\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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DC-seitige Abschaltung direkt am String statt nur netzseitiger Trennung<\/strong><\/strong><\/strong><\/h3>\n<\/div>\n\n\n\n
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geeignet f\u00fcr Systemspannungen bis 1.500 V DC und bis zu 20 A pro String<\/strong><\/strong><\/strong><\/h3>\n<\/div>\n<\/div>\n\n\n\n
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Bei der galvanischen Trennung wird die elektrische Verbindung zwischen PV-Generator und Wechselrichter vollst\u00e4ndig unterbrochen. Nach der Ausl\u00f6sung sind die Leitungen ab der QFire-Schaltbox spannungsfrei. Dieses Prinzip reduziert DC-Gefahren im Brandfall deutlich und sorgt f\u00fcr maximale Sicherheit bei Einsatzkr\u00e4ften und Servicepersonal.

Dieses Schaltprinzip erh\u00f6ht die Sicherheit im Brand- und Einsatzfall erheblich, da gef\u00e4hrliche Gleichspannungen zuverl\u00e4ssig unterbrochen werden. Gleichzeitig ist die galvanische Trennung unabh\u00e4ngig von der Anlagenkonfiguration, der Stringl\u00e4nge oder der Anzahl der angeschlossenen Generatorfelder wirksam.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n

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QFire BIG control box for large PV systems<\/h2>\n\n\n\n
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Central Control and Coordinated Disconnection of PV Strings<\/strong><\/p>\n\n\n\n

The QFire control box operates with independent system logic. This ensures that the disconnection function remains clearly defined and reliably controllable even with complex system structures, multiple roof areas, or long cable runs. <\/em><\/p>\n<\/div>\n<\/div>\n\n\n\n

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Central System Logic<\/strong>Central evaluation of all control signals and coordinated control of switch boxes<\/p><\/div>\n\n\n\n

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Flexible Disconnection Triggering<\/strong>Control via firefighter button, external emergency stop, fire alarm system, or AC-coupled via the power grid<\/p><\/div>\n\n\n\n

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Clear Separation of Control and DC Switching<\/strong>No DC load switching in the control box, resulting in clean system architecture<\/p><\/div>\n\n\n\n

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Status and Remote Signaling Contacts<\/strong>Feedback of operating and switching states for integration into higher-level systems<\/p><\/div>\n\n\n\n

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Cluster-Capable for System Structures with Multiple Roof Areas<\/strong>Cluster control box for large or distributed systems<\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n

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The control box forms the central control element of the QFire BIG generator disconnection. It handles the complete evaluation logic of incoming control signals and coordinates the control of connected switch boxes. In case of triggering, the control box ensures defined, safe disconnection of all connected DC strings \u2013 regardless of number, distance, or system size. Through the clear separation of control and DC switching function, the electrical structure remains clear and compliant with standards. The control box itself does not switch DC loads but functions as a higher-level logic and interface layer. This makes the system particularly suitable for larger and complex PV systems with multiple generator fields or future expansion requirements. <\/strong><\/h3>\n<\/div>\n<\/div>\n\n
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QFire BIG Firefighter Switch: Cluster Technology for Large PV Systems<\/h2>\n\n\n\n
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Star-shaped connection of multiple Switch Boxes<\/strong><\/p><\/div>\n\n\n\n

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Simultaneous Disconnection of Up to 5 Roof Areas<\/strong><\/p><\/div>\n\n\n\n

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Nearly Unlimited Scalability<\/strong><\/p><\/div>\n<\/div>\n\n\n\n

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Cluster technology enables central disconnection of multiple generator fields via a common control logic.<\/strong><\/p>\n<\/div>\n\n\n\n

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QFire BIG cluster control box for central shutdown of distributed generator fields<\/h2>\n\n\n\n
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Additionally: Higher-Level, Star-Configured Disconnection Structure<\/strong><\/p>\n\n\n\n

For large and complex photovoltaic systems with multiple roof areas or generator fields, the cluster control box extends the QFire BIG system with a higher-level, star-configured disconnection structure.<\/em><\/em><\/p>\n<\/div>\n<\/div>\n\n\n\n

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Star-Configured System Structure<\/strong><\/strong>Central connection of multiple switch boxes or system areas via a defined cluster topology<\/p><\/div>\n\n\n\n

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Coordinated Disconnection of Multiple Roof Areas and Generator Fields<\/strong><\/strong>Coordinated disconnection of spatially separated generator fields via a common triggering instance<\/p><\/div>\n\n\n\n

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Large Distances Achievable<\/strong><\/strong>Reliable disconnection even with long cable runs<\/p><\/div>\n\n\n\n

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Unambiguous Disconnection Logic Even for Complex Systems<\/strong><\/strong>Clear assignment of generator fields and disconnection areas for maximum operational safety<\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n

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The cluster control box supplements the functions of the QFire BIG generator disconnection for systems with multiple roof areas, halls, building sections, or widely distributed generator fields. It functions as a higher-level distribution and coordination unit and enables star-configured connection of multiple switch boxes or system segments. The cluster structure allows even large and spatially complex PV systems to be shut down reliably and simultaneously. The shutdown logic remains clearly defined \u2013 regardless of the number of connected switch boxes or the overall size of the installation. This makes the QFire BIG firefighter switch system with cluster control box particularly suitable for industrial, commercial and logistics facilities, as well as for projects with future expansion requirements. <\/strong><\/h3>\n<\/div>\n<\/div>\n\n
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\"Technische<\/span>
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Triggering Methods and Interfaces<\/h2>\n\n\n\n
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Disconnection via the Central Control Box<\/strong><\/p><\/div>\n\n\n\n

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Connection to Fire Alarm Systems (FAS)<\/strong><\/p><\/div>\n\n\n\n

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External Emergency Stop Buttons and Key Switches<\/strong><\/p><\/div>\n\n\n\n

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AC-Coupled Disconnection in Case of Power Failure<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n

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Plug + Play Installation<\/h2>\n\n\n\n
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Pre-Configured Control Connections<\/strong><\/p><\/div>\n\n\n\n

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Matching Mating Connectors Included in Delivery<\/strong><\/p><\/div>\n\n\n\n

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Pre-Wired Interfaces<\/strong><\/p><\/div>\n\n\n\n

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Reduced Wiring and Installation Effort<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n

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QFire BIG switch box for modular DC shutdown with galvanic isolation<\/h2>\n\n\n\n
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For Safe Disconnection Up to 1,500 V DC \/ 20 A per String<\/strong><\/p>\n\n\n\n

The QFire BIG firefighter switch boxes provide galvanic isolation of the PV strings directly at the generator field. They form the central DC switching function of the system and ensure safe, standards-compliant disconnection of the connected strings during shutdown. Through the modular design, the switch boxes can be flexibly adapted to different system structures \u2013 from small partial generators to large PV systems with multiple roof areas and high string counts.<\/em><\/p>\n<\/div>\n<\/div>\n\n\n\n

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String Count + Modularity<\/strong><\/strong><\/strong>\u25a0<\/strong> Standard 2 to 24 strings per switch box\u25a0<\/strong> Flexible string reductions possible (e.g., 8 inputs \u2192 4 outputs)\u25a0<\/strong> Expandable through combination of multiple switch boxes<\/p><\/div>\n\n\n\n

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Galvanic Isolation According to Standards<\/strong><\/strong><\/strong>\u25a0<\/strong> Galvanic DC isolation of each individual string\u25a0<\/strong> Certified according to IEC \/ DIN EN 60947-3\u25a0<\/strong> Suitable for VDE-AR-E 2100-712\u25a0<\/strong> Safe DC disconnection up to 1,500 V DC \/ 20 A per string<\/p><\/div>\n\n\n\n

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Enclosure + Protection Rating<\/strong><\/strong><\/strong>\u25a0<\/strong> Suitable for weather-protected outdoor areas\u25a0<\/strong> 2\u201316 strings: Polycarbonate enclosure, choice of gray or transparent cover, IP66 \/ IP67, IK08\u2013IK10\u25a0<\/strong> 18-24 strings: Robust sheet steel enclosure, IP66, IK10<\/p><\/div>\n\n\n\n

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Connectors and Connection Variants<\/strong><\/strong><\/strong>\u25a0<\/strong> Standard MC4-Evo2 (St\u00e4ubli)\u25a0<\/strong> Alternatively Sunclix, Amphenol, or terminal technology<\/p><\/div>\n\n\n\n

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Surge Protection & PV Fuses (Optional)<\/strong><\/strong><\/strong><\/strong>\u25a0<\/strong> Optional integrated Q3 DC surge protection T1+T2 up to 1,500 V DC, other manufacturers available on request\u25a0<\/strong> Optional PV fuses in positive and\/or negative pole<\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n

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Each switch box in the system provides galvanic isolation of the connected PV strings directly at the installation location.<\/h3>\n<\/div>\n<\/div>\n\n
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Warum ist QFire BIG keine Moduloptimierer- oder Rapid-Shutdown-L\u00f6sung?<\/h2>\n\n\n\n
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QFire BIG is not a module optimizer solution and not a conventional module-level rapid shutdown solution. This distinction is important because these systems follow a different technical approach. <\/strong><\/p>\n\n\n\n

Module optimizers, microinverters and MLPE systems operate directly at the individual module or module string and are often associated with power optimization, monitoring or rapid shutdown. QFire BIG is designed differently: the system disconnects PV strings close to the generator via a switch box and is designed for commercial and industrial PV systems with multiple strings, clear cable routing and a defined shutdown concept. <\/p>\n\n\n\n

The focus is not on module optimization, but on safe DC string disconnection and PV generator disconnection. QFire BIG disconnects the DC strings by galvanic isolation according to IEC 60947-3 and is integrated into the project-specific system planning. <\/p>\n<\/div>\n<\/div>\n\n

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QFire BIG Firefighter Switch: Project-Specific Instead of Standard Solution<\/h2>\n\n\n\n

The QFire BIG switch boxes are designed, planned, and manufactured project-specifically. String count, connection technology, protective components, enclosure sizes, and interfaces are individually tailored to the respective system structure. This creates not an off-the-shelf standard solution, but a technically sound, standards-compliant, and future-proof disconnection solution \u2013 Made in Germany.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n

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String Count<\/h3>\n\n\n\n

\u25a0<\/strong> Switch boxes from 2 to 24 PV strings\u25a0<\/strong> Flexible string reductions between input and output<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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Connectors and Connection Variants<\/h3>\n\n\n\n

\u25a0<\/strong> Standard: MC4-Evo2 from St\u00e4ubli\u25a0<\/strong> Alternatively H4, Sunclix, or terminal technology possible<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n

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DC Surge Protection<\/h3>\n\n\n\n

\u25a0<\/strong> Optional integrated surge protection\u25a0<\/strong> Standard: Q3 surge protection T1+2 up to 1,500 VDC\u25a0<\/strong> Alternative surge protection manufacturers available on request<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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PV Fuses<\/h3>\n\n\n\n

\u25a0<\/strong> Optional integrated PV fuses\u25a0<\/strong> In positive and\/or negative pole possible<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n

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Projektanfrage Feuerwehrschalter QFire BIG<\/h2>\n\n\n\n
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Sie m\u00f6chten das QFire BIG System projektspezifisch auslegen, technische Details pr\u00fcfen lassen oder die passende Systemkonfiguration f\u00fcr Ihre Photovoltaikanlage ausw\u00e4hlen?<\/strong>


\u00dcber das nachfolgende Anfrageformular erfassen wir alle relevanten Projektdaten strukturiert und nachvollziehbar.<\/p>\n<\/div>\n\n\n\n

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Gerne k\u00f6nnen Sie Verschaltungspl\u00e4ne, Stringpl\u00e4ne oder weitere technische Unterlagen direkt mitsenden. Auf dieser Basis pr\u00fcfen wir die technischen Rahmenbedingungen, legen das QFire BIG System passend zu Ihrem Projekt aus und stimmen die Komponenten gezielt ab.
Sollten R\u00fcckfragen erforderlich sein, melden wir uns bei Ihnen. Andernfalls erhalten Sie direkt ein projektspezifisches Angebot.<\/em><\/p>\n\n\n\n

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Projektanfrage starten \u2192<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n
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Projektanfrage Feuerwehrschalter<\/h2>\n\n\n
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Projektbezogene Anfrage zur Auslegung des QFire Systems. Auswahl der Komponenten und Erstellung eines Angebots.<\/p>\n\n\n\n

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Projektanfrage Feuerwehrschalter QFire starten \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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Technische Unterlagen Feuerwehrschalter<\/h2>\n\n\n
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Datenbl\u00e4tter, Zertifikate und technische Dokumentationen zu QFire BIG und LITE, Steuerboxen, Schaltboxen sowie Zubeh\u00f6r.<\/p>\n\n\n\n

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Technische Unterlagen zum Feuerwehrschalter \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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\"Wann<\/span>
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Funktionsweise + Technik QFire<\/h2>\n\n\n
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Technische Grundlagen zur DC-seitigen Abschaltung, Systemaufbau, Ausl\u00f6searten, galvanischer Trennung und normkonformer Umsetzung.<\/p>\n\n\n\n

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Funktionsweise + Technik Feuerwehrschalter \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
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\"FAQ<\/span>
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FAQ zum Thema Feuerwehrschalter<\/h2>\n\n\n
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Antworten auf h\u00e4ufige Fragen zu Einsatz, Normen, Ausl\u00f6sekonzepten, Pflichtanforderungen und Betrieb von Feuerwehrschaltern in PV-Anlagen.<\/p>\n\n\n\n

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FAQ zum Thema Feuerwehrschalter \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n
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Fachbeitr\u00e4ge & Pressemeldungen zum Feuerwehrschalter f\u00fcr Photovoltaik<\/h2>\n\n\n\n

Der Einsatz von Feuerwehrschaltern in Photovoltaik-Anlagen wird in der Branche intensiv diskutiert \u2013 insbesondere im Hinblick auf Sicherheit, Normung und Einsatz im Brandfall. Hier finden Sie ausgew\u00e4hlte Fachberichte, Branchenmeldungen und technische Einordnungen.<\/p>\n\n\n\n

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Wann ist ein Feuerwehrschalter bei Photovoltaik-Anlagen notwendig?<\/h3>\n\u2192<\/span>\n<\/a>\n\n\n\"\"\n

Generatorfreischaltung mit dem Feuerwehrschalter<\/h3>\n\u2192<\/span>\n<\/a>\n\n\n\"\"\n

Q3 PV-Feuerwehrschalter \u201eQFire\u201c erh\u00e4lt Zertifizierung nach IEC 60947-3 <\/h3>\n\u2192<\/span>\n<\/a>\n\n\n\"\"\n

QFire PV Feuerwehrschalter Schulung: Praxisnahe Schulung f\u00fcr Planer und Installateure<\/h3>\n\u2192<\/span>\n<\/a>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

String-Level Remote DC Disconnection for Large PV Systems Large Industrial and Commercial Roofs Multiple Roof Areas Expandable PV Projects Multiple Inverters & MPP Trackers Complex System Structures Increased Safety Requirements The modular system architecture is particularly suitable for complex roof structures, multiple generator fields, and large PV capacities with many strings. Depending on system size,… <\/p>\n","protected":false},"author":1,"featured_media":8509,"parent":7284,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_themeisle_gutenberg_block_has_review":false,"footnotes":""},"class_list":["post-7519","page","type-page","status-publish","has-post-thumbnail","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7519","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/comments?post=7519"}],"version-history":[{"count":10,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7519\/revisions"}],"predecessor-version":[{"id":8878,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7519\/revisions\/8878"}],"up":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7284"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/media\/8509"}],"wp:attachment":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/media?parent=7519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}