Juwi Office Building

Secure Power Supply with SUNNY BACKUP SET Juwi sets new standards:

the solar engineering company built an office building with the highest energy efficiency in the world in Wörrstadt/Germany. The office complex was constructed of wood and has a surface of 8,500 m² providing space for approx. 300 employees. The entire energy supply is covered by renewable energy sources.

Doing this, juwi relies on the technology of SMA: the company headquarters is equipped with a solar power plant that reliably protects important loads from power outages with the Sunny Backup Set. For this, the SMA Sunny Backup System charges the batteries and switches automatically to Backup operation, if necessary. Nine Sunny Backup inverters, with 5 kW each, supply PCs, telecommunication, emergency lighting and fire sprinkling system with energy – even in the event of a grid failure.

Plant Size

  • 45 kW nominal power Sunny Backup
  • 92 kWp PV power
  • 3,600 Ah/48 V (173 kWh) battery



  • Wörrstadt, Deutschland
  • Operator: juwi Holding AG
  • Planning and realization: juwi Holding AG
  • Commissioning: July 2008

Power Consumers of Backup

  • Emergency lighting
  • Fire sprinkling system
  • Computer
  • Telecommunication


  • 9 Sunny Backup 5000
  • 2 Sunny Boy 5000TL
  • 6 Sunny Mini Central 10000TL
  • 1 Sunny Boy 4000TL
  • 2 Sunny Boy 3800
  • 1 Sunny Boy 1700


SMA Australia Pty Ltd
Level 1, 213 Miller Street
North Sydney NSW 2060

PO Box 645,
North Ryde BC, NSW 1670,

Tel. +61 (02) 9491 4200
Fax +61 (02) 9491 4290
Freecall 1800 SMA AUS