Featuring greenhouses that have improved thanks to Voltiris

Intensive agronomical and energetic validation

Since our inception, we have remained committed to systematically assessing the influence of our solar modules on greenhouse crops. In 2022, we initiated a preliminary small-scale study at the Agroscope Greenhouse Research Center in Switzerland, demonstrating the absence of adverse effects on selected standard greenhouse crops. Building on this, we have since then extended our investigations to a larger scale, rigorously analyzing both the agronomic and energetic impacts of our modules. This involved a series of projects with positive outcomes encompassing various crops and locations, as detailed in the case studies below. 


Serre des Marais

  • Switzerland, Troinex (Geneva)

    Serre des Marais

  • Start: 08.2023

  • Cherry Tomato

  • 1000 m2

  • Demonstrate the absence of impact of Voltiris’ spectral filtering
    solar technology on cherry tomato and its capacity to produce
    renewable energy.

  • Project still running.


Royal van zanten

  • Netherlands, Rijsenhout (North Holland)

    Royal Van Zanten

  • 03.2023 – 09.2023

  • Alstroemeria

  • 120 m2 - with 60m2 trial zone and 60m2 control zone

  • Investigate Voltiris' spectral filtering technology's ability to
    potentially replace the application of whitewash during periods
    of elevated heat

  • The installed filters lead to an average temperature reduction
    of -2°C during direct sunlight exposure, illustrating our solution's
    ability to improve the climate within a greenhouse.


  • Switzerland, Conthey (Valais)

    Agroscope, Research Center for Protected Agriculture

  • 03.2022 – 11.2022

  • Tomato, bell pepper, lettuce, basilicum

  • 20 m2 - 2 greenhouse compartments, with each 10m2 trial zone,
    and 10m2 control zone

  • Demonstrate the absence of impact of Voltiris’ spectral filtering
    solar technology on selected standard greenhouse crops (tomato,
    bell pepper, lettuce, and basilicum)

  • No measureable impacts on various growth metrics on all crops:
    - Plant biomass (digital biomass)
    - Yield
    - Plant height
    A reduction of up to 15% of the plant perspiration has been
    measured during the warmest months.


  • The Netherlands, Bleiswijk (Zuid-Holland)

    Wageningen University & Research, Greenhouse horticulture

  • 02.2023 – 11.2023

  • Soilless vine tomato Marinice

  • 200 m2 - 2 greenhouse compartments, with each 100m2. One
    compartment, and one trial compartment.

  • Demonstrate the absence of impact of Voltiris’ spectral filtering
    solar technology on state-of-the-Art growing techniques applied
    to standard soilless tomato cultivation.
    The energetic yield of the 24 Voltiris modules will also be studied
    in these trials.

  • No statistically significant reduction of the agronomical yield below
    the module has been measured despite yields approaching 30k/m2.


  • France, Saint-Denis-en-Val (Loiret)

    CVETMO Experimentation center for Centre-Val de Loire growers

  • 02.2023 – 11.2023

  • Soilless cucumber, umbrella cultivation, PROLOOG (Rijk Zwaan)

  • 80 m2 - 8 small (10m2) compartments , 4 with Voltiris spectral
    filters, 4 with a control film

  • Study the growth and health of cucumber crop which is
    intensively cultivated in the Centre-Val de Loire.
    Special care will be given to the study of pest and beneficial
    insect populations below the spectral filters.

  • The number of thrips has decreased 3x when comparing the area
    below the filters to the control surface.

Sana Giardin

  • Switzerland, Saas (Graubünden)

    Sana Giardin

  • 08.2022 - 09.2023

  • Various vegetables and ornmental flowers

  • 40 m2 - 1 wide-span greenhouse equipped with 15 Voltiris
    modules, covering a ground surface of 45 m2

  • Demonstrate the ability to retrofit, i.e. the ability to build the
    modules in any type of greenhouse. Here the modules were built
    in a 40 years-old Gysi wide-span greenhouse.

  • The modules were easily installed inside of the greenhouse. No
    reduction of the agronomical yield below the modules has been

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