Secure power supply with Sunny Backup 5000

The German Red Cross in Kassel relies on solar power: the retirement home Jungfernkopf with 77 residents provides space for five common rooms that are grouped around four inner courtyards. The photovoltaic plant with a total power output of 57.6 kWp on the roof of the retirement home ensures a environmentally friendly solar power supply.

Thanks to the SMA Sunny Backup-System, the retirement home is optimally protected against power outage. In the event of a grid failure, the intelligent system automatically switches to Backup operation within only 20 ms: the main consumers will continue to be supplied from the battery or parts of the solar power plant.

Plant size

• 15 kW nominal power Sunny Backup
• 57.6 kWp total PV power, thereof 33 kWp PV power at Backup
• 1.200 Ah/48 V (58 kWh) battery

Information on the plant

• Location: Kassel, Germany
• Operator: German Red Cross, district chapter Kassel Wolfhagen e. V.
• Planning and realization: Solartechnik Stiens GmbH & Co. KG, Kaufungen
• Commissioning: November 2008

Power Consumers of Backup

• Nurse call system
• Telephone system
• Heating
• Kitchen components
• Sockets in the common rooms

Inverter

• Sunny Backup 5000
• Sunny Mini Central 10000TL