ESS INVEST 1
A battery of 6 MW and 12 MWh in Rochefort, on Enedis’s distribution grid, in service since 4 March 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 | 6 MW |
| Energy | 12 MWh |
| Hours at full power | 2.0 |
| Charging power | 6 MW |
| In service | 4 March 2026 |
| Commune | Rochefort, Charente-Maritime, Nouvelle-Aquitaine |
| Network | Enedis, HTA |
| Substation it connects through | Rochefort (ROCH8) |
| Placed on the map | at the distribution substation it connects through (Rochefort), from Caparéseau |
| EIC code | 17W000002441777Z |
The company
This battery is filed under the name of a company, ESS INVEST 1 (SIREN 953401346), registered 1 July 2023 with its seat in Langon. The company register lists its officers as:
- COMAX FRANCE, Président de SAS (SIREN 447722257)
The company register as read by recherche-entreprises.api.gouv.fr on 20 October 2026, Licence Ouverte. Officers are not owners: a company’s president is usually its parent company, but the register of shareholders is not public.
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.