{"id":7217,"date":"2026-01-16T13:50:00","date_gmt":"2026-01-16T12:50:00","guid":{"rendered":"https:\/\/q3-energie.de\/qfire-firefighter-switch-for-a-4-7-mwp-pv-system-at-ladenburger\/"},"modified":"2026-05-26T13:31:05","modified_gmt":"2026-05-26T11:31:05","slug":"qfire-firefighter-switch-for-a-4-7-mwp-pv-system-at-ladenburger","status":"publish","type":"post","link":"https:\/\/q3-energie.de\/en\/qfire-firefighter-switch-for-a-4-7-mwp-pv-system-at-ladenburger\/","title":{"rendered":"QFire firefighter switch for a 4.7 MWp PV system at Ladenburger"},"content":{"rendered":"\n
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QFire firefighter switch for a 4.7 MWp PV system at Ladenburger<\/h1>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n
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Optimising QFire PV firefighter switch safety for the PV system at Ladenburger<\/strong><\/h2>\n\n\n\n
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Firefighter switch safety: The construction of a large-scale PV power plant with a total output of 4.7 MWp on the warehouse roofs of Ladenburger in Bopfingen represents a significant step towards sustainable energy generation. Since early May 2023, e.systeme21 has been working on this forward-looking project, which addresses not only environmental but also technical challenges. <\/p>\n\n\n\n

Optimising energy demand<\/h2>\n\n\n\n

The experts at e.systeme21 developed a tailored system concept that takes the company\u2019s annual and daily electricity demand into account. The system spans three large roofs with trapezoidal sheet-metal cladding and a large flat roof, and comprises 11,191 modules across a total area of more than 22,500 m\u00b2. The system is matched to the company\u2019s electricity demand to achieve maximum yield. <\/p>\n<\/div>\n\n\n\n

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Firefighter switch<\/h4>\n\n\n\n

PV fire protection<\/h4>\n\n\n\n

QFire BIG<\/h4>\n<\/div>\n\n\n\n
Project data<\/strong><\/th><\/th><\/tr><\/thead>
Application<\/td>PV fire protection<\/td><\/tr>
Location<\/td>Ladenburger<\/td><\/tr>
Technology<\/td>QFire BIG firefighter switch<\/a><\/td><\/tr>
Special features<\/td>\u25a0 Integrated delay circuit\u25a0 Integrated surge protection T1+2\u25a0 Connection to the fire alarm system<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n
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Feed-in power challenge<\/h3>\n\n\n\n

Despite the high generation capacity, the responsible grid operator approved a feed-in capacity of only 30 kW, which corresponds to zero export. To meet this requirement, a certified process for controlling feed-in power was established, supplemented by redundant safety shutdowns. <\/p>\n\n\n\n

Safety as the top priority<\/h3>\n\n\n\n

Particular attention was paid to firefighter switch safety, especially to protecting the fire brigade\u2019s emergency responders. The cables are routed on crossbeams and guided through Q3 firefighter switch boxes, which enable both central shutdown\u2014via the fire alarm control panel\u2014and decentralised shutdown\u2014at each relevant crossbeam. This allows emergency responders to carry out firefighting operations safely. Even the safe tearing down of crossbeams, should this be necessary for the success of the firefighting operation, is possible. <\/p>\n<\/div>\n<\/div>\n\n

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Firefighter switch safety<\/h3>\n\n\n\n

Several reasons were decisive in choosing Q3\u2019s QFire PV firefighter switches:<\/p>\n\n\n\n