Stellantis EV Platforms

STLA Medium · STLA Large · Smart Car · Leapmotor

Stellantis has more EV platforms than it has winning EVs. Its 2026 plan folds them toward one native-EV architecture and leans on Leapmotor for low-cost technology.

Stellantis EV platforms by vehicle size. Small: e-CMP (Peugeot e-208, Jeep Avenger; 400 V, NMC) and Smart Car (Citroen e-C3, Fiat Grande Panda; 400 V, LFP). Medium: STLA Medium (Peugeot e-3008, Opel Grandland; 400 V, 73-98 kWh). Large: STLA Large (Dodge Charger Daytona, Jeep Wagoneer S; 400 V and 800 V capable). Frame: STLA Frame, whose battery-electric Ram 1500 REV was cancelled. Next: STLA One native-EV architecture with Peugeot first, and Leapmotor, in which Stellantis holds about 21 percent, supplying LEAP 3.5 technology through Leapmotor International. Cells come from ACC, StarPlus Energy with Samsung SDI, NextStar Energy with LGES, and a CATL LFP plant in Zaragoza. STELLANTIS EV PLATFORMS BY VEHICLE SIZE Small Medium Large Frame e-CMP e-208, Avenger 400 V, NMC Smart Car e-C3, Panda 400 V, LFP STLA Medium e-3008, Grandland 400 V, 73-98 kWh STLA Large Charger, Wagoneer 400/800 V STLA Frame Ram REV cancelled BEV dropped STLA One (next) native-EV architecture, Peugeot first Leapmotor (21% stake) LEAP 3.5 tech; Leapmotor International Cells: ACC (Mercedes, TotalEnergies), StarPlus (Samsung SDI),CATL LFP joint venture in Zaragoza (NextStar sold to LGES)
Native-EV platforms
STLA Medium, Large
Small cars
e-CMP, Smart Car
Voltage
Mostly 400 V
China partner
Leapmotor
Hub
Systems

Finding

Stellantis spread its EV effort across too many multi-energy platforms and is now consolidating onto STLA One while buying low-cost EV technology from Leapmotor

The STLA family was announced in 2021 as four platforms (Small, Medium, Large, Frame) built for battery-electric first but able to take engines. STLA Medium launched with the Peugeot e-3008 in Sochaux and the Opel Grandland Electric in Eisenach; STLA Large with the Dodge Charger Daytona in Windsor and the Jeep Wagoneer S in Toluca. The battery-electric Ram 1500 REV on STLA Frame was cancelled in 2025, and small cars stayed on e-CMP and the cheaper Smart Car platform.

Every STLA platform shares the same weakness: it is multi-energy, so packaging, mass and cost carry engine-car compromises. The 2026 strategic plan responds with STLA One, a new native-EV architecture that effectively replaces STLA Medium, debuting on Peugeot B- and C-segment cars with STLA Brain software and steer-by-wire. STLA Brain, the central-compute and zonal E/E program, slipped repeatedly before that.

The cost answer is Chinese. Stellantis owns about 21 percent of Leapmotor and 51 percent of Leapmotor International, which sells the T03, C10 and B10 in Europe and adds local assembly in Zaragoza. Leapmotor's LEAP 3.5 central-domain architecture is cheaper than anything Stellantis built in-house, and CATL is building an LFP cell plant with Stellantis in Zaragoza. See also Stellantis EVs.

Platforms

Stellantis platform lineup

Representative models only. STLA Large is 400 V on current models and designed for 800 V.

Stellantis EV platforms
PlatformVoltageBattery and driveE/E and computeRepresentative EVsPlants
e-CMP400 V50-54 kWh NMC; 115 kW and 156 hp front motorsDomainPeugeot e-208, e-2008; Opel Corsa; Jeep Avenger; Fiat 600e; Alfa Romeo JuniorZaragoza, Tychy, Trnava
Smart Car400 V44 kWh LFPDomain, low costCitroen e-C3, e-C3 Aircross; Fiat Grande Panda; Opel FronteraTrnava, Kragujevac
STLA Medium400 V73 or 98 kWh NMC; single-speed EDMsDomain; STLA SmartCockpitPeugeot e-3008, e-5008; Opel Grandland; DS N8; Citroen C5 Aircross; Jeep CompassSochaux, Eisenach, Melfi, Rennes
STLA Large400 V, 800 V capable85-100.5 kWh NMC; 400 V and 800 V EDMsDomainDodge Charger Daytona; Jeep Wagoneer S, ReconWindsor, Toluca, Detroit
STLA Frame400 VUp to 229 kWh planned-Ram 1500 REV (BEV cancelled)Sterling Heights
STLA OneTBDTBDSTLA Brain, steer-by-wireNext Peugeot B- and C-segment carsTBD
Leapmotor LEAP 3.5400 V and 800 VLFP, cell-to-chassisCentral domain controllerLeapmotor T03, C10, B10Jinhua (China), Zaragoza

Cells

Battery cell sources

Stellantis battery cell joint ventures and suppliers
VenturePartnerSiteChemistry
ACCMercedes-Benz, TotalEnergies (Saft)Billy-Berclau Douvrin, FranceNMC
StarPlus EnergySamsung SDIKokomo, IndianaNMC
NextStar Energy (sold to LGES, Feb 2026)LG Energy SolutionWindsor, OntarioNMC
CATL joint ventureCATLZaragoza, SpainLFP

Sources

Sources and scope

Scope
Stellantis EV Platforms
Sources
Stellantis Investor Day (June 2024) and strategic plan (May 2026); Autocar via Autto (June 2026); Leapmotor; ACC, StarPlus, NextStar, CATL releases
Updated
October 2026