France's electricity system is managed by a single TSO – Réseau de Transport d'Électricité (RTE) – and multiple DSOs, with Enedis being the largest, along with other regional DSOs. 

Enedis, in coordination with RTE, has published a map (link) identifying electricity network areas that are structurally constrained for the connection of new medium- and low-voltage renewable energy projects. Based on projects already registered in the connection queue, the map highlights areas where network saturation is expected for at least five years, and distinguishes them from areas where connection capacity may still be available, subject to further technical assessment.

The map provides a substation‑level strategic overview intended to support public authorities and project developers in anticipating grid constraints, guiding spatial planning, and informing site selection for new renewable energy projects. It is designed as a transparency and planning tool and does not substitute for a formal connection application, as detailed technical studies remain necessary to assess the actual hosting capacity available on the network.