Storage site at Saint-Laid
A battery of 240 MW and 480 MWh in Cernay-lès-Reims, on RTE’s transmission grid, in service since 12 January 2026. Every fact below is the national register’s own, and a field not shown is one the register leaves blank.
In the national register
| Power | 240 MW |
| Energy | 480 MWh |
| Hours at full power | 2.0 |
| In service | 12 January 2026 |
| Commune | Cernay-lès-Reims, Marne, Grand Est |
| Network | RTE, 225 kV |
| Substation it connects through | SSLAI |
| Placed on the map | near RTE’s Cernay, 63 kV substation in Cernay-lès-Reims, whose position RTE publishes only approximately |
| EIC code | 17W000002385265P |
| Name as filed | SSLAIS01-STOCKAGE N0 01 DE SAINT-LAID |
What is not published
Who owns this battery, who trades its power, and what it earns: the register carries none of these, and no French body publishes a battery’s metered output or the instructions RTE gives it.
Source: Registre national des installations de production et de stockage d’électricité, register of 31 August 2026, on ODRÉ, Licence Ouverte 2.0. Substation positions from Caparéseau.