Stellantis will temporarily pause production at several French plants in October as deliveries of batteries for long-range electric vehicles remain below demand. The shutdowns do not have one single explanation across the group. Sochaux and Rennes are linked to insufficient availability of batteries supplied by Automotive Cells Company, while the pause at Mulhouse has been attributed to other industrial and market-adjustment reasons.
The plants and dates
At Sochaux, in eastern France, production is scheduled to stop from 23 to 30 October. The plant builds the Peugeot 3008 and Peugeot 5008, including electric versions based on Stellantis’ STLA Medium platform. The company said the decision was linked to limited availability of certain batteries intended for long-range electric vehicles.
Rennes is scheduled to pause from 22 to 30 October. The site builds vehicles including the Citroën C5 Aircross. Stellantis has connected the decision to the same supply problem affecting the larger-battery versions of its electric vehicles. Demand for those versions is particularly strong among fleet customers, and current supply capacity has not been sufficient.
Mulhouse is also included in the group of French production adjustments, with a planned pause from 15 to 30 October. Available reporting indicates that its reasons are different from the battery shortage. That distinction matters: a temporary halt at a Stellantis plant does not automatically mean that every affected line is short of battery cells or that the electric-car market has suddenly collapsed.
Reports have also referred to a pause at Poissy. The exact timing and reason should be checked against the company’s local production notice before being treated as identical to the Sochaux and Rennes battery issue. The central, confirmed point is that Stellantis is changing schedules at several French sites rather than closing them permanently.
Why ACC matters
Automotive Cells Company, or ACC, was created by Stellantis, Mercedes-Benz and TotalEnergies to develop European battery-cell production. Its first large factory is at Billy-Berclau-Douvrin in the Hauts-de-France region. ACC describes the facility as being in a production ramp-up phase, with output increasing as manufacturing blocks and processes are stabilised.
Battery-cell manufacturing cannot be scaled in the same way as a conventional component line. Cells have to be produced consistently, tested, sorted and assembled into modules with predictable performance. A vehicle plant can have bodies, motors and interiors ready, but it cannot complete a long-range EV if the specific battery pack is missing or does not meet the required quality standard.
The current shortage is therefore specific rather than universal. Stellantis is not saying that it cannot build electric vehicles at all. The pressure concerns the larger batteries used for higher-range versions. Reporting has referred to packs of roughly 97 kWh alongside smaller packs of about 73 kWh, but exact availability varies by model, factory and market.
ACC’s own 2025 reporting says that the Douvrin site is gradually increasing production. The company’s public information describes a first production block planned around 15 GWh and a further expansion programme. Those figures describe industrial capacity, not the number of packs immediately available to Stellantis, and they should not be confused with a short-term delivery forecast.
Which vehicles may be affected
The Peugeot E-3008 and E-5008 are built at Sochaux and use the STLA Medium architecture. Related vehicles include the Opel Grandland Electric and DS N°8. Their long-range versions are among the applications associated with ACC cells. A delay in cell deliveries does not necessarily stop every variant on a line, but it can alter the production mix and the order in which customer cars are completed.
For buyers, the most visible consequence is a longer wait. Specialist reports have described some long-range orders moving into the first or second quarter of 2027. That is not a universal delivery promise for every country, trim or customer. A buyer should ask the retailer whether the quoted date refers to a vehicle already built, a confirmed production slot or a provisional estimate.
The production pause should also not be read as a cancellation of the models. Peugeot 3008, Peugeot 5008, Opel Grandland and DS N°8 remain part of the group’s electric strategy. The issue is the rate at which a particular battery type can be supplied, and the way the factories adjust their schedules while ACC continues its industrial ramp-up.
A supply-chain problem, not a simple demand story
The situation shows how tightly an electric vehicle depends on the timing of its battery supply. A manufacturer may have customer orders and an available assembly line, yet still be unable to finish a car if a battery cell shipment is late. A long-range pack is not always an interchangeable part: its software, cooling system, crash protection and homologation must match the vehicle.
Europe is trying to build more local cell capacity at the same time as carmakers face pressure on cost, energy and demand. ACC’s Douvrin plant is part of that effort. The original industrial plan also included large sites in Germany and Italy, but those projects were later reconsidered. Concentrating on a smaller number of plants can improve focus, while leaving less short-term redundancy during the ramp-up period.
Stellantis has said that ACC has made progress and reduced its production problems, but that supply is still not sufficient. The group is therefore balancing three practical needs: prioritising existing long-range orders, avoiding unwanted inventories of other variants, and keeping its plants and workforce on a workable schedule.
What customers should do
Customers in Europe who are waiting for a long-range E-3008, E-5008, Grandland Electric or DS N°8 should request an updated written delivery estimate. It is also useful to confirm the battery capacity, the production plant and whether the car has a confirmed build slot. A dealer’s estimate may change as ACC’s deliveries and Stellantis’ production allocation change.
For now, the evidence supports a narrow conclusion. Stellantis is facing a temporary supply bottleneck for long-range EV batteries at a time when demand for those versions is strong, especially from fleets. Mulhouse’s separate pause should not be merged into that explanation, and there is no evidence in the cited material that the affected models are being cancelled. The next meaningful indicator will be whether ACC’s ramp-up translates into more predictable deliveries during the first part of 2027.
