
Manufacturer of high-quality photovoltaic modules – glass/glass, glass/foil and roof-integrated, made in Germany.

CS Wismar GmbH (SONNENSTROMFABRIK)
WismarNew on Amplifa
About Sonnenstromfabrik
SONNENSTROMFABRIK (CS Wismar GmbH) is a German manufacturer of photovoltaic modules with headquarters and production in Wismar. The company has been producing solar modules in Europe for more than 25 years and serves different applications with the DIAMOND (glass/glass) and SAPPHIRE (glass/foil) series as well as roof-integrated modules. The modules are produced using modern half-cut cell technology, and in the case of the Professional glass/glass series, with back contact technology. The material basis is silicon solar cells, glass, backsheet films and, in cooperation with Oxford PV, perovskite. Production follows CO2-optimized processes with regular audits and supplier audits. The sales countries include Germany, France, the Benelux countries and Italy; sales are made via wholesale and installation partners.
- Site
- Wismar
- Processes
- PV module manufacturing (solar modules, half-cut cell technology), Glass/glass module manufacturing with back contact technology, Glass/foil module manufacturing, Roof-integrated module manufacturing, Product warranty (glass/foil 12 years, glass/glass 20 years; extendable to 25/30 years), All-round photovoltaic protection/insurance incl. storage system, Warranty extension and performance guarantee, Webinars for installers/skilled trades
- Materials
- Silicon solar cells, Perovskite, Glass, Backsheet film, Perovskite (Oxford PV)
- Industries
- Photovoltaics/Solar Energy, Wholesale, Installation Trade
- 01
Cell and material procurement
- 02
Module manufacturing (stringing, laminating)
- 03
Quality inspection
- 04
Distribution via wholesale and installation partners
- 05
Service and warranty processing
Materials and Technologies
Silicon solar cells
Base material of the solar cells for all module types, including half-cut technology.
Glass
Glass/glass module design for the highest performance and design requirements and long service life.
Backsheet film
Glass/foil design of the SAPPHIRE series for quality- and aesthetics-conscious applications.
Perovskite (Oxford PV)
Material for perovskite modules in cooperation with Oxford PV.
Sites
Wismar
DEHeadquarters and production (module plant)
- Materials
- Silicon solar cells, glass, backsheet film, perovskite
Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| PV module manufacturing (solar modules, half-cut cell technology)Assembly | – | – | – | – | Silicon solar cells, Glass, Backsheet film, Perovskite (Oxford PV) |
| Glass/glass module manufacturing with back contact technologyAssembly | – | – | – | – | Glass, Silicon solar cells |
| Glass/foil module manufacturingAssembly | – | – | – | – | Glass, Backsheet film, Silicon solar cells |
| Roof-integrated module manufacturingAssembly | – | – | – | – | Glass, Silicon solar cells |
Additional services
Reference customers
History
- 2024
Award 'Top Brand PV 2024'
- 2023
Dr. Bernhard Weilharter leaves the company on June 30
- 2023
Intensification of the cooperation with Oxford PV for perovskite modules at Intersolar in Munich
More than 25 years of experience as a manufacturer of solar modules in Europe