Share on
Facebook Twitter Linkedin
Contact us



STEel Roof

PHOSTER - Ready to plug BIPV roofing steel envelope based on green innovative technologies and processes

PHOSTER project consists in the development of highly efficient eco-designed building integrated photovoltaic (BI-PV) roofing element using innovative and greener manufacturing process. The project intends to strongly contribute in the expansion and the promotion of the solar energy (a green energy) and to address the climate change environmental problem.

A prototype of a new universal solar steel roof envelope will be designed, manufactured, installed and monitored during the project's 48-month timeframe.

Environmental Objectives

In order to support the further expansion of the solar energy and to limit as much as possible its environmental impact, the PHOSTER project aims at prototyping a new universal eco-designed roofing envelope including flexible thin film PV modules using steel as substrate and its related innovative and optimized manufacturing processes.

Five environmental targets are set for the project:

1 - Reduction of up to 30 % of the Global Warming Potential with respect to a framed PV module installed on a metallic roof, representing 46 kg CO2 eq./m².

2 - 15% reduction of the carbon footprint and the primary energy use for manufacturing CIGS modules, thus leading to a savings of 15.8 kg CO2 eq./solar cell m². This will be achieved by reducing the energy required by 50% during the selenisation process, and by introducing energy efficient management of the solar cell installation.

3 - An increase of 1,5 % of the kWh/kWp produced with respect to currently available BI-PV modules on steel roofs, mainly achieved by reducing the shadow effect on the steel profile and by optimising the PV module global design

4 - To reduce the amount of the rare toxic element cadmium by 20 to 25 g per m² of PV module (100% reduction in comparison with existing technologies).

5 - Achievement of an eco-designed BI-PV Roofing envelope, of which at least 85% (in weight) is recyclable. With a foreseen weight of the PHOSTER envelope of 10 kg/m² a minimum 8.5 kg/m² of material can be recycled at the module’s end of life.

Main Project Activities

  • Development of high efficiency GIGS semiconductor on steel using roll-to-roll equipment and innovative and optimized manufacturing processes.
  • Prototyping new universal eco-designed roofing envelop and its related innovative manufacturing processes.
  •  Implementing two demonstrators composed of 8 modules each in two different locations with different exposure to the sun. It will allow to assess the efficiency of the innovative concept to produce green energy under different conditions
  • Monitoring the environmental impact of the innovative solution and its related manufacturing processes  

European Commission LIFE+ program co-financing

The European Commission is co-financing the PHOSTER project

The LIFE programme is the European Union’s financing programme for the environment. Its general aim is to contribute to the development and deployment of the EU’s environmental policy and regulation by co-funding pilot or demonstration projects with high European added value.