Manufacturing and implementation of the foldable HELIOFLEX® solar folding roof over land already in industrial and transport use
dhp Technology AG
Zizers (CH) · Unterensingen (DE)New on Amplifa
About dhp Technology
dhp Technology AG, headquartered in Zizers/Graubünden, develops, manufactures and plans the HELIOFLEX® solar folding roof – a foldable lightweight photovoltaic system with a cable-based structural concept and a patented folding mechanism, inspired by cable car technology. The systems are installed over land already in use, such as sewage treatment basins, parking lots, logistics areas and landfills, without restricting the primary use. The structure consists of galvanized steel with additional anti-corrosion coating, moving parts made of stainless steel and special plastics; glass-free lightweight modules as well as bifacial solar modules are used. Component manufacturing takes place at the company's own, highly automated production site in Zizers in lightweight steel construction. The company covers the entire value chain – from preliminary study and yield simulation through project management and installation to 24/7 monitoring, service and financing models. Reference projects exist in Switzerland, Germany, Austria and Liechtenstein, including the solar folding roof over the sewage treatment basins of ARA Davos (252 kWp) and, at 2.75 MWp, the largest solar folding roof in Germany in Stuttgart-Mühlhausen.
- Site
- Zizers
- Processes
- Development and planning of solar folding roof projects (Swiss Engineering), Manufacturing of solar folding roof components (lightweight steel construction, cable-based, Installation of solar folding roof systems (columns, steel trusses, load-bearing/tension cables,, Monitoring & service of solar folding roof systems (24/7 control center, first intervention, annual), Project management & construction of solar folding roofs, Development, manufacturing and planning of solar folding roof projects from a single source, Project management & construction (cost estimate, tendering, procurement, cost control,), Monitoring & service (24/7 control center, first intervention, annual inspection)
- Materials
- Stainless steel, Galvanized steel with additional coating against rust (load-bearing structure), Special plastics (moving parts), Plastic (solar modules, glass-free lightweight modules), Bifacial solar modules, Steel cables (load-bearing and tension cables, cable car technology), Galvanized steel with additional coating, Special plastics
- Certificates
- ISO 9001, ISO 14001
- Founded
- 2015
- Industries
- Wastewater treatment plants/sewage treatment, Parking areas/parking garages, Logistics areas, Landfills, Transport surfaces/highway rest areas, Energy suppliers
- 01
Preliminary study & yield simulation (PV SOL, PV-GIS)
- 02
Engineering & manufacturing in Zizers
- 03
Project management & procurement
- 04
Installation & electrical integration
- 05
Handover of the system
- 06
Monitoring & service (24/7 control center)
Materials & Processes
Galvanized steel with additional coating
Forms the load-bearing structure of the solar folding roof and is protected against rust.
Stainless steel
Used for the moving parts of the folding mechanism.
Special plastics
For moving parts that withstand weathering and corrosion requirements.
Glass-free lightweight modules
Weight-reduced solar modules with identical output data as conventional modules, facilitating integration into the folding roof.
Bifacial solar modules
Also use reflected ground light and increase yield by up to ten percent.
Steel cables
Load-bearing and tension cables from cable car technology hold the folding roof groups.
Sites
Zizers
CHHeadquarters, highly automated production site: development, manufacturing, planning
- Materials
- Galvanized steel, stainless steel, special plastics
- Highly automated production
Unterensingen
DEBranch office of dhp Technology Deutschland GmbH
Systems & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Development and planning of solar folding roof projects (Swiss Engineering)Engineering | – | – | – | – | steel, stainless steel, special plastics |
| Manufacturing of solar folding roof components (lightweight steel construction, cable-basedAssembly | – | – | – | – | galvanized steel, stainless steel, special plastics |
| Installation of solar folding roof systems (columns, steel trusses, load-bearing/tension cables,Assembly | – | – | – | – | steel |
| Monitoring & service of solar folding roof systems (24/7 control center, first intervention, annual)Testing | – | – | – | – | – |
| Project management & construction of solar folding roofsAssembly | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Highly automated production site | – | – | – | – | Zizers/Graubünden, Switzerland |
Additional services
Reference customers
Quality & Certification
dhp Technology has been certified according to ISO 9001 and ISO 14001 since December 2020. The systems are monitored via a 24/7 control center; the service contract includes first intervention and annual inspection.
| Evidence | Zizers | Unterensingen |
|---|---|---|
| ISO 9001 | ||
| ISO 14001 |
History
- 2015
Gian Andri Diem founds dhp technology AG.
- 2017
Commissioning of the first solar folding roof at ARA Chur (2017/18).
- 2019
First solar folding roof over a parking area (Jakobsbad-Kronberg aerial cableway, project 2019–2020).
- 2020
First alpine solar folding roof at ARA Davos (252 kWp); ISO 9001 and ISO 14001 certification since December 2020.
- 2024
First solar folding roof in Germany (Neuwied, Rhineland-Palatinate) commissioned in early 2024.
- 2025
World premiere: solar folding roof installed over circular basins for the first time (ARA Davos, 349.44 kWp).
- 2026
First solar folding roofs in Liechtenstein (Vaduz 312 kWp, Schaan 205.92 kWp); construction start of the Stuttgart-Mühlhausen solar folding roof (2.75 MWp, commissioning from January 2027).