Rector Lesage strengthens its CSR strategy by becoming the majority shareholder of Mecosun

By André Sudrie - PR Agency Published on Tuesday, November 25, 2025 at 16:30

Photo credits : RECTOR

Summary for decision-makers

The Rector Lesage Group has become the majority shareholder of Mecosun, a Haute-Garonne-based expert in the integration of photovoltaic panels for buildings. This acquisition is in line with the group's CSR policy, confirmed by the approval of the SBTI decarbonization trajectory and the AFNOR exemplary certification by 2025.

Mecosun offers patented panel integration solutions, standard (Mecopark) and custom (Megapark) shade structures for parking lots. This acquisition strengthens the group's presence in the French market and facilitates its development in Central Europe, particularly in Poland, Belgium, the Czech Republic, and Slovakia.

Summary

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The Rector Lesage Group is pursuing its diversification strategy and expanding into new markets by acquiring a majority stake in Mecosun, a specialist in mounting systems for photovoltaic panels. This acquisition marks another key step for the Mulhouse-based family group, strengthening its position in the renewable energy sector and creating a business entirely dedicated to this field.

The Rector Lesage Group is strengthening its CSR commitments with the majority acquisition of Mecosun, a pioneer in integrated photovoltaics.

The Rector Lesage Group becomes the majority shareholder of the company Mecosun, alongside the two main founding shareholders of the company.

The acquisition of Mecosun, recognized in the field of green energy as a pioneer in building-integrated photovoltaic solutions, is perfectly consistent with the policy CSR of the Rector Lesage group, and whose commitments made in 2022 were confirmed in 2025 by:

SBTI approval of the decarbonization trajectory
but also by obtaining the AFNOR exemplary level label in 2025.

Mecosun, an expert in patented systems for integrating and installing photovoltaic solar panels, is based in Saint-Lys, Haute-Garonne. Its activities are structured around three main areas:

Integration systems,
Mecopark, standard self-weighted parking shade structures without foundations,
Megapark, custom-made industrial shade structures.

Mecosun's two latest activities will allow the Rector Lesage group to create strong synergies and complementarities with some of its subsidiaries such as Rector, Neo, and Rector Charpentes et Structures.

The integration into the Rector Lesage Group presents a new opportunity for Mecosun which will allow it not only to strengthen its position on the national market, but also to develop more rapidly internationally, particularly in Poland, Belgium, Czech Republic and Slovakia, countries in which the group is already present.

The next edition of the Energaïa renewable energy forum, which takes place from December 10 to 11 in Montpellier, will be the ideal opportunity for the Rector Lesage Group to unveil its strategy, ambitions and innovative offerings in this new field of activity.

Mecosun in figures

2024 Revenue: €8,6 million
Number of employees: 15 people

Frequently Asked Questions for Decision Makers

What are Mecosun's areas of expertise?

Mecosun specializes in systems for integrating and installing photovoltaic solar panels, as well as standard self-weighted parking canopies and custom-made industrial canopies.

What is the objective of the acquisition of Mecosun by the Rector Lesage Group?

The acquisition aims to strengthen the Rector Lesage Group's CSR policy and create synergies with its subsidiaries, while accelerating Mecosun's development in France and internationally.