Solid-State Batteries Hit the Road: Stellantis Begins Testing in Electric Charger Daytona

June 13, 2026 — The long-awaited promise of solid-state battery technology just took a major leap forward. Stellantis has officially confirmed that it has begun real-world road testing of a Dodge Charger Daytona prototype equipped with advanced solid-state battery cells from supplier Factorial Energy.

This marks the first time solid-state cells have been integrated into a Stellantis vehicle, and it's happening in one of the brand's most iconic namesakes — the electric Charger Daytona.

The Headline: What Makes This Story Matters

Stellantis and Factorial announced their intentions for a test fleet of solid-state-equipped Charger Daytonas last fall, with the program slated to begin in 2026. Today's confirmation means that timeline is on track, and the technology is no longer confined to a lab.

The battery in question uses Factorial's FEST (Factorial Electrolyte System Technology) solid-state cells. In 2025, the two companies demonstrated a claimed energy density of 375 watt-hours per kilogram — significantly higher than conventional lithium-ion packs. The cells can also recharge from 15% to 90% in just 18 minutes, and have been tested for reliability at temperatures ranging from -22°F to 113°F.

Stellantis integrated the FEST cells into an existing battery pack using a new mechanical architecture, reworking control systems and pack design for better performance without sacrificing safety or durability.

While Stellantis hasn't disclosed how long the testing program will run or when to expect production vehicles with solid-state batteries, several companies have targeted 2030 as a commercialization milestone. This road-testing program is an encouraging sign that the timeline may be achievable.

Market Context: A Shifting EV Landscape

The solid-state announcement comes at a pivotal moment for the electric vehicle industry. According to the IEA's Global EV Outlook 2026, global electric car sales share reached 25% of total new car sales — the fifth consecutive year with roughly 3.5 million additional EVs sold annually.

However, the U.S. market tells a different story. American EV market share dropped to 5.8% in Q1 2026 after the $7,500 federal tax credit expired in September 2025. New EV sales fell 28% year-over-year to just 216,399 units in the first quarter.

Meanwhile, gas prices remain elevated at approximately $4.17 per gallon nationally — down slightly from $4.28 last week but still well above pre-pandemic levels. This pricing environment continues to create headwinds for EV adoption in the U.S., even as global momentum builds.

GM's Parallel Battery Strategy Shift

In related news, General Motors is reportedly reevaluating its plans to use lithium-iron phosphate (LFP) batteries in future EVs. Instead, GM is doubling down on lithium-manganese-rich (LMR) battery technology, which the company says can match LFP costs while delivering greater energy density.

Kurt Kelty, GM's VP of Battery & Sustainability, described LMR batteries as the future "workhorse" of GM's EV strategy. The company aims to begin commercial LMR production by 2028, though its Tennessee plant will start producing LFP cells this month for energy storage applications rather than vehicles.

While Tesla, Ford, and Rivian have turned to LFP chemistry to reduce EV costs, GM's pivot to LMR represents a divergent approach — one that could reshape the competitive landscape for next-generation battery technology.

Looking Ahead: What This Means for Consumers

Solid-state batteries represent what many in the industry consider the holy grail of EV power — higher energy density means longer range, faster charging means less downtime, and improved temperature tolerance means better real-world usability. If Stellantis can bring this technology to market by 2030 as targeted, it could be a significant differentiator in an increasingly crowded EV market.

For American consumers currently hesitant about EVs due to range anxiety and charging times, solid-state technology could be the breakthrough that finally tips the scales. Combined with falling battery costs and improving charging infrastructure, 2030 may well be the year electric vehicles become truly mainstream in the United States.

The road ahead is still long, but today's announcement from Stellantis proves that the destination is no longer just a dream — it's already being driven.