Back-up power supply for BOS radio network in Saxony

Project description

Initial situation
Meißen County is responsible for setting up and maintaining a cross-municipality alerting and messaging system in the region. It operates its own digital radio alerting network as a BOS (Behörden u. Organisationen mit Sicherheitsaufgaben). In the autumn of 2017, storm Herwart caused massive damage and local power outages in eastern Germany. In the event of a long-term power failure, the district, as the lower disaster control authority, must ensure that communications are maintained. Until now, there has been no reliable backup power supply for such blackout scenarios.

The Meißen District Office uses the BOS radio system for digital alerting of the fire brigade, rescue services and disaster control in emergency and crisis situations. All radio stations are connected to the public 230 V network. In the event of power failures, the radio system must be kept operational without interruption for at least 72 hours. Up to now, portable emergency power systems with combustion engines have been used for local incidents, but their running time is severely limited and they require an enormous amount of manpower for deployment. As an alternative solution, a test installation with EFOY Pro fuel cells was operated from January 2018. Based on the promising results, the Meißen District Office commissioned EFOY partner FKS GmbH to equip the BOS sites with nine EFOY ProCubes energy solutions.

The EFOY ProCubes used consist of an EFOY Pro 2400 fuel cell, a 60 Ah lead gel battery, an M5 fuel cartridge and a specially designed collection container for the condensation water produced. In interaction with the software of the fuel cell and the alarm converter, the control and monitoring of the network and the plant is carried out. In order to be prepared for an emergency, the district office carries out fixed test runs twice a year, where a power failure is simulated and operation is ensured and tested exclusively via the fuel cells.

“Die system can be used in the black case without personnel expenditure. With the EFOY Pro fuel cells we can ensure the back-up power supply for our BOS radio system. The system can be used in the black case without personnel expenditure. The new technology and its almost noise- and emission-free operation open up further application possibilities that would not be feasible with combustion engines.”
Jens Mauersberger,
Meißen District Office, Office for Fire Protection, Disaster Control and Rescue Services

The EFOY ProCubes deliver 60 Ah of battery capacity via the built-in battery. This means that the digital alarm converter can be operated for approx. 46 hours without recharging by the fuel cell. The EFOY Pro’s switch-on threshold is programmed accordingly low; it switches on fully automatically and recharges the battery. With the energy gained from the installed fuel cartridge, the battery can be fully recharged three times and autonomous operation of the system can be implemented for at least five more days. This results in an operating time of at least seven days in the event of a power failure. The requirements of at least 72 hours were therefore far exceeded. Further advantages of the solution are the easy transport, the comfortable assembly with low personnel expenditure as well as the simple installation as an all-in-one complete package at the locations. The EFOY ProCubes are currently used exclusively in buildings. However, outdoor applications are also planned for the future, which can be easily implemented due to the weatherproof housing.

The project “Back-up power supply for the BOS radio system” is funded with a total of 29,198 EUR by the Federal Ministry of Transport and Digital Infrastructure as part of the National Hydrogen and Fuel Cell Technology Innovation Program. The funding guideline is coordinated by NOW GmbH and implemented by Project Management Jülich (PtJ).

Consortium Leader / Applicant:
Meißen District Office, Office for Fire Protection, Disaster Control and Rescue Services
Project partners: SFC Energy AG, FKS GmbH / Supported by BMVI
Customer(s): Meißen District Office, Office for Fire, Disaster Protection and Rescue Services

State: Saxony
Place: Meissen

Field(s) of application: Telecommunications
Fuel cell system: Efoy ProCube, climatic suitability in the range from -20°C to +50°C
Bridging time: min. 72 hours
Rated power: according to model
Fuel: methanol, hybrid operation with solar system possible

Commissioning: From February 2020


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SFC Energy AG
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Björn Ledergerber
Vice President Clean Energy & Mobility at SFC Energy

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