FAQ

Can solar panels be installed on a flat roof or a rooftop terrace?

Yes. A flat roof can accommodate photovoltaic panels, whether on a new building or as part of a renovation project. Several solutions are available depending on the type of roof, its waterproofing, its insulation, and the load-bearing capacity of the structure. Soprasolar systems are designed to integrate photovoltaic panels into the roof while maintaining its waterproofing function. A building assessment helps determine the solution best suited to the project.

Fill out our online project form: https://www.soprasolar.com/fr/project-application

How do you install solar panels on a flat roof without drilling into the roof?

There are rooftop-mounted photovoltaic solutions that allow solar panels to be installed on a flat roof without penetrating the waterproofing. Soprasolar systems use, for example, mounting pads welded directly to the waterproofing membrane or lightweight, self-adhesive photovoltaic modules, depending on the chosen solution. The absence of through-penetration fasteners helps preserve the integrity of the flat roof’s waterproofing system. The choice of method depends on the configuration of the building and the roof.

Fill out our online project form: https://www.soprasolar.com/fr/project-application

Can solar panels be installed on an existing flat roof?

Yes, provided that the condition of the roof and the structure’s ability to support the photovoltaic system are verified beforehand. In renovation projects, an assessment helps evaluate the building’s waterproofing, insulation, and load-bearing capacity. Depending on the characteristics of the existing roof, a photovoltaic system mounted on pedestals or a lightweight solution may be considered. Prior renovation of the roof system may also be necessary.

Fill out our online project form: https://www.soprasolar.com/fr/project-application

Which solar power system should you choose for an existing flat roof?

The choice depends primarily on the roof’s configuration, its waterproofing and insulation system, and the structural load-bearing capacity. Soprasolar offers, among other things, photovoltaic solutions mounted on pedestals using Fix Evo and lightweight, self-adhesive solutions using Flex. For an existing roof, a preliminary assessment helps determine the building’s suitability and guide the selection of the appropriate installation method.

Fill out our online project form: https://www.soprasolar.com/fr/project-application

How can I tell if my building is suitable for solar panels?

The feasibility of a photovoltaic system depends on several characteristics of the building: roof type, structure, load-bearing capacity, insulation, existing waterproofing, and project-specific constraints. A technical study allows for the assessment of these various factors and the determination of the photovoltaic solution best suited to the roof. This step is particularly important for existing buildings and renovation projects.

Fill out our online project form: https://www.soprasolar.com/fr/project-application

Modules photovoltaïques

Does the energy delivered by a PV module throughout its lifespan counterweigh the energy used to produce it?

Relevant progress has been made with regards to the Energy Pay-Back Time. The time required for the PV module to work off its energy debt is 1 year. Considering a lifespan of 30 years, a PV module will produce around 30 times the amount of energy that was required to build it.

Can the PV modules be recycled?

94%, that’s the average reuse rate for crystalline PV modules with an aluminium frame!

Source Soren: the eco-organization authorized by the government for the collection and processing of used photovoltaic panels in France.

For additional information: https://www.soren.eco/

Can the waterproofing works cause constraints on a solar roof project.

Yes. It is necessary to consider and design the future installation of a power station while erecting the building. It is not only true for solar systems but also for numerous work contract lots. Naturally, these works are subjected to insurance requirements and must comply with up-to-date regulations.

What’s the current dynamic with regards to solar electricity production cost?

The cost of solar electricity production continues to decrease. According to a report from the International Renewable Energy Agency (IRENA), it could even decrease by another 60% by 2025.

On a PV-ready roof, what is the number of PV modules that can be installed?

It depends on several factors. To provide the best answer, we need to assess if panels can be installed across the entire roof and identify any hindrances or amenities present. Generally, the ratio is 1 kWp per 10 sqm. Please feel free to contact our Sales Managers for more information.