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Stellantis EV Platforms


This article summarizes Stellantis' major EV platforms and why they matter. A platform is not just a chassis. It is a layered system that shapes real-world behavior: charging curve stability, sustained performance, thermal limits, software longevity, and autonomy headroom.

Stellantis operates many brands (Jeep, Ram, Dodge, Chrysler, Fiat, Peugeot, Citroën, Opel/Vauxhall, Alfa Romeo, Maserati, DS Automobiles, Lancia). Platform sharing is expected by design: STLA platforms define the underlying "skate", while brand execution differentiates styling, tuning, software features, interior design, and option strategy.


What a Stellantis platform controls

Stellantis platforms are best understood as a stack: a vehicle “skate” platform family plus a software-defined vehicle (SDV) layer that spans multiple brands.

  • Structural and energy layer: pack layout, crash structure, suspension hard points, multi-body packaging
  • Powertrain and charging layer: voltage class (400 V vs 800 V-class), fast-charge headroom, drive unit integration
  • EEA (electrical/electronic architecture): controller consolidation, in-vehicle networking, OTA scope
  • Software platform layer: Stellantis' SDV layers (STLA Brain, STLA SmartCockpit, STLA AutoDrive) intended to unify software across brands

Stellantis platform roadmap

Stellantis' EV platform roadmap can be summarized as:

  • Legacy / current: e-CMP and other regional architectures used across compact programs
  • STLA families (next-gen): STLA Small, Medium, Large, Frame as the core BEV platform set
  • SDV overlay: STLA Brain / SmartCockpit / AutoDrive as cross-brand software architecture layers

Stellantis EV platform lineup

Platform / Architecture Primary Use Voltage / Charging Architecture Direction Representative Examples
STLA Small Smaller passenger EVs (compact segments) 400 V-class (program dependent) Next-gen small-vehicle BEV platform family for multiple Stellantis brands Future compact BEVs across EU-focused brands
STLA Medium Mainstream passenger EVs (C/D segments) 400 V-class (program dependent) Modular BEV platform for high-volume cross-brand use Future Peugeot/Opel/Jeep/Fiat-class programs
STLA Large Larger passenger EVs (performance + premium capable) 400 V and 800 V-class capability is referenced in Stellantis messaging (program dependent) Supports higher-performance and longer-range programs; intended for North America and global premium products Dodge/Jeep/Chrysler/Alfa Romeo-class next-gen EVs
STLA Frame Body-on-frame trucks and large SUVs 400 V and 800 V-class capability is referenced (program dependent) Truck/SUV platform family optimized for towing, payload, and durability Ram/Jeep large SUV and truck BEV programs
e-CMP (legacy) Compact cross-brand programs (legacy EV architecture) 400 V-class (typical for segment) Earlier multi-energy architecture used across multiple European brands Prior generation compact EVs across Peugeot/Opel/Citroën/Fiat lines
STLA Brain / SmartCockpit / AutoDrive Cross-brand SDV software stack Enables broader OTA capability (not a voltage spec) Unifies software and compute architecture across platforms and brands Roadmap layer intended to span STLA Small/Medium/Large/Frame

STLA Small / Medium

STLA Small and STLA Medium are the volume platforms intended to replace a patchwork of regional legacy architectures. Their main value is industrial: shared modules, faster cadence, and more consistent electrical architecture behavior across brands.

What these tend to enable:

  • Faster cross-brand rollout of EV programs using shared modules
  • More consistent charging and thermal behavior generation-to-generation
  • Clearer SDV upgrade path because the EEA and software layers can standardize

See the STLA Small and STLA Medium platform pages.


STLA Large

STLA Large targets higher performance and longer-range programs and is positioned as a global platform for premium and performance-oriented products. Public Stellantis messaging references both 400 V and 800 V-class capability across STLA platforms, with the exact implementation varying by model program.

What STLA Large tends to focus on:

  • Higher power and thermal headroom for sustained performance
  • Potential for higher-voltage charging configurations on select programs
  • Platform commonality across multiple North America and global brands

See the STLA Large platform page.


STLA Frame

STLA Frame is the truck-and-large-SUV platform family designed for towing, payload, and durability. It matters because those use cases stress thermal systems, high-power draw, and charging behavior more than typical passenger duty cycles.

What STLA Frame tends to enable:

  • Chassis and suspension hardpoints optimized for heavy loads
  • Battery sizing and cooling strategies aligned to towing and high-duty cycles
  • Architecture consistency across truck/SUV programs for fleets

See the STLA Frame platform page.


STLA Brain / SmartCockpit / AutoDrive (SDV layer)

Stellantis presents STLA Brain (core compute/EEA layer), STLA SmartCockpit (cabin UX), and STLA AutoDrive (ADAS/automation features) as a cross-brand SDV stack. This matters because it can decouple software capability from any single vehicle platform and allow consistent OTA behavior across brands and segments.

See the Stellantis SDV stack.


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