Grid capacity map France: official sources explained
Which official grid capacity maps exist for France, how to read them, what they don't tell you, and a five-step workflow to screen a site before you talk to the grid operator.
Official sources
For France: Caparéseau (RTE and the DSOs).
How to read them
Caparéseau shows, per substation (poste source), the capacity reserved under the regional S3REnR scheme, what is already allocated and what remains.
What they don't tell you
S3REnR capacity applies to renewables; storage and large loads follow other connection rules.
None of the official maps tell you whether there is usable land nearby, what the zoning is, or whether noise, flood or nature rules will block a project.
A five-step screen
1. Check the official source for the area's status. 2. On Gridscouter, find the nearest substations at the right voltage and their BESS, solar, wind or data-center score. 3. Run the land finder for plots within a set radius, filtered by size and land use. 4. Run quick due diligence on the best plots: noise, flood, nature, heritage and industrial-safety buffers. 5. Ask Enedis or RTE for a pre-study (pré-étude simple or approfondie).
Caveat
Gridscouter scores are estimates from open data, not grid operator capacity figures. Always confirm capacity with the operator.