Official Stellantis image of a blue Dodge Charger Daytona

news June 12, 2026

Dodge Charger Daytona Starts Road Testing With Solid-State Battery Cells

Stellantis and Factorial have started road testing a Dodge Charger Daytona development vehicle with FEST solid-state battery cells, moving the technology from lab validation into real-world EV calibration.

By Marcus Holloway

Solid-state batteries just took a meaningful step out of the lab and into a real Stellantis EV.

In an official announcement, Stellantis and Factorial say they have integrated Factorial’s FEST solid-state battery cells into a Dodge Charger Daytona development vehicle and started a road-testing program. The companies describe it as the first integration of solid-state cells into a Stellantis vehicle, and the first automotive integration of the technology in North America.

That does not mean a solid-state Charger is suddenly headed to showrooms. It does mean the project has moved from cell-level promise to vehicle-level calibration, which is where battery technology either starts to look real or starts exposing all the ugly details that lab numbers can hide.

What Stellantis Is Testing

The test car is a Dodge Charger Daytona development vehicle based on Stellantis’ STLA Large architecture. That part matters because STLA Large is meant to support a wide spread of high-output vehicles, from electric muscle cars to premium SUVs, not just a one-off science project.

Stellantis says the Factorial cells were integrated into the existing battery pack using a patented mechanical architecture developed by the automaker. Engineers also adapted the pack design and control systems so the solid-state cells can be evaluated under real charging, driving, safety, and durability conditions.

In plain English: this is not a simple battery swap. Solid-state cells behave differently from conventional liquid-electrolyte lithium-ion cells, and they need the pack, cooling, software, crash structure, and battery-management logic to work together. The Charger Daytona is now a rolling test bed for that whole system.

Why The Battery Numbers Matter

The numbers are the reason this story is worth watching.

In 2025, Stellantis and Factorial said FEST cells demonstrated 375 Wh/kg energy density, charging from 15 percent to 90 percent in 18 minutes, and operation across -30 C to 45 C. Those figures are cell-level claims, not final Charger Daytona range or charging specs, but they explain why automakers keep spending money on solid-state work.

Higher energy density could allow an EV to carry the same usable energy with less mass, or more energy without growing the pack as much. Faster charging could make long-distance stops feel closer to a gasoline refuel. Better thermal and safety behavior is part of the promise too, though real-world validation is exactly what this test program is meant to examine.

The crucial caveat is scale. A great battery cell is not automatically a great vehicle pack, and a great development pack is not automatically affordable at production volume. That is the gap Stellantis and Factorial are now trying to close.

Why Use The Charger Daytona?

The Charger Daytona is an interesting choice because it is not a quiet efficiency appliance. It is heavy, powerful, emotional, and controversial in exactly the way an electric Dodge should be. If solid-state cells can reduce pack mass or improve charging behavior in a performance EV, the benefit is easy to understand.

The current electric Charger Daytona has already had to make the argument that muscle can survive without a V8. A future battery breakthrough would give Dodge a more practical way to sharpen that pitch: less weight, stronger sustained performance, quicker charging, and potentially better range without turning the car into something anonymous.

That is still a future-tense argument. Stellantis has not announced production timing, pricing, range, or a customer version of this solid-state Charger. For now, the news is that road testing and calibration have started.

The Bigger Stellantis Angle

This also fits Stellantis’ broader EV reset.

The company has been talking less like an automaker chasing a single all-electric deadline and more like one trying to keep multiple powertrain paths alive while EV demand sorts itself out. The Charger itself is a good example: Dodge is selling the electric Daytona alongside the gas-powered Sixpack, and European Charger orders are now open for both versions.

Solid-state batteries could give Stellantis a better EV hand later in the decade, but the company is being careful not to overpromise a showroom date. That restraint is healthy. The auto industry has had too many battery breakthroughs that looked unbeatable in a slide deck and slow, expensive, or fragile in production.

What makes this one more concrete is the vehicle integration step. A real car on a real test program is not commercialization, but it is a more serious milestone than another lab cell announcement.

What Buyers Should Take From This

If you are shopping for an EV in 2026, this does not change your buying decision. Solid-state batteries are not a reason to pause a purchase this summer, and the first production applications are likely to be expensive, limited, or both.

The current EV market is still about battery chemistry, charging access, pricing, incentives, and whether the vehicle fits your daily life. A 300-mile EV with reliable charging support is more useful today than a hypothetical solid-state car with no launch date.

But as a technology signal, the Charger Daytona test is important. Stellantis and Factorial are no longer just saying the cells work. They are trying to make them work inside a performance EV that has to survive the boring, brutal realities of heat, vibration, software calibration, fast charging, and safety validation.

That is where the solid-state story gets interesting. Not because the battery miracle has arrived, but because one of the more unusual electric cars on sale has become a serious development mule for the next version of the EV battery race.