Bosch Solar Energy

Bosch Solar Energy AG was a German solar wafer and solar cell manufacturer, based in Erfurt, which specialized in crystalline silicon-based photovoltaic (PV) products, as well as thin-film modules using amorphous silicon and CIGS absorber materials. The company consisted of the various divisions for silicon, wafers, solar cells and modules, research and production facilities in Germany and France and plans were made to open a production line in Malaysia.[1] It has been listed on the German stock exchange since 30 September 2005 and on 19 December 2005 its shares were admitted to the TecDAX. The enterprise was founded in 1997 as ErSol Solarstrom GmbH & Co. KG.

Bosch Solar Energy AG
Public (FWB: ES6)
IndustryRenewable Energies, Photovoltaics
Defunct31 May 2016 
HeadquartersErfurt, Germany
Key people
Holger von Hebel(CEO)
Juergen Pressl(COO)
Peter Schneidewind(CSO)
Volker Nadenau(CTO)
Number of employees
1517 (as of 1 February 2010)
ParentRobert Bosch GmbH

In 2013, Robert Bosch GmbH announced that it will exit from the solar business. SolarWorld took over production in Arnstadt and continued to employ about 800 workers.[2] The parent company also sold its shares of Aleo Solar.[1]



  • March 1997
Formation of company as Ersol Solarstrom GmbH & Co. KG
  • September 2005
Initial public offer
  • June 2008
Robert Bosch GmbH becomes majority shareholder
  • March 2009
Groundbreaking for new production facility in Arnstadt
  • September 2009
Change of name into Bosch Solar Energy AG
  • November 2009
Takeover of: aleo Solar AG (68,7% majority shareholding) and Johanna Solar Technologie GmbH (> 60% majority shareholding)
  • March 2013
Robert Bosch GmbH announced, the company will exit its solar business and sell or shut down all of these operations.[1]

Structure and products

Bosch Solar Energy is subdivided into four different divisions according to product groups. The various subsidiaries are responsible to these divisions:

  • SRS Silicon Recycling Services The Bosch Solar Energy subsidiary SRS Silicon Recycling Services, Inc., specialises in the recycling of silicon. The scope of the ersol Group subsidiary currently covers: silicon for solar and semiconductor applications, metallurgical grade silicon and support products. All grades of silicon.
  • Bosch Solar Wafers Bosch Solar Wafers GmbH is a specialist manufacturer of monocrystalline ingots and wafers. The Bosch Solar Energy subsidiary currently produces the following products:
    • Monocrystalline silicon ingots
(p- and n-type)
    • Monocrystalline silicon wafers
(p- and n-type)
    • Crystals and wafers with special twin structure.
  • Solar Cells produces solar cells in the format 156 mm x 156 mm and is the core business sector. At a thickness of 200 µm and less, the average efficiency of monocrystalline ersol solar cells is around 17%. The share of production dedicated to higher-grade monocrystalline cells compared to multicrystalline solar cells is increasing and currently stands at about 80%. The parent company Bosch Solar Energy AG is responsible for production at its plants in Erfurt and Arnstadt.
  • Bosch Solar Modules is accountable for all group activities relating to the production and sale of solar modules. The division incorporates Erfurt-based Bosch Solar Thin Film GmbH, which is devoted to the production of thin-film solar modules and achieves significant savings in the raw material silicon with the aid of thin-film technology. In addition, ersol markets crystalline solar modules from solar cells produced by ersol and other manufacturers through its Erfurt-based trading subsidiary Bosch Solar Modules GmbH. The division also has a crystalline module production line at the planning stage.

Management board

The management board of Bosch Solar Energy AG consists of four members:

  • Holger von Hebel, CEO (responsibilities: Corporate Development, Finance/Controlling, Human Resources, Corporate Communications, IT, Legal Affairs and Post Merger Integration)
  • Dr. Volker Nadenau, CTO (responsibilities: Research & Development, Process Development and Photovoltaic Strategy)
  • Jürgen Pressl, COO (responsibilities: Manufacture of Ingots, Wafers, Solar Cells, Crystalline and Thin-film Solar Modules, Purchasing/Supply Chain Management)
  • Peter Schneidewind, CSO (responsibilities: Sales, Marketing and Product Management)

See also


  1. "Bosch exits solar business". Photon. 25 March 2013. Archived from the original on 2016-03-04. Retrieved July 2015. Check date values in: |accessdate= (help)
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