BYD Vice Chair Says Solid-State Battery EV Arrives in 2027, But It's a 1,000-Car Test Fleet, Not a Product Launch

BYD Executive Vice President Stella Li told Spanish outlet Carwow.es in an interview conducted in Valencia on September 13, 2026, that the world's largest EV maker will have "one model" running on solid-state battery technology in 2027. It's the most senior, most direct claim BYD has made yet about a near-term rollout of the technology often called the holy grail of battery chemistry.

Li said: "Any battery technology, I guarantee you will find in one corner of BYD R&D; we are studying that. So, talking about solid-state battery, BYD is in the leading position; we're in the leading position for the commercial line, and for the technology. So to prove that, even next year we will have one model that will be the first model with this technology there."

She did not name the vehicle. She gave no energy density figures, no range numbers, no price, and no firm production date. Multiple outlets that reviewed the same interview, including Tech Times and Electrek, noted the same gaps.

What's Actually Confirmed

BYD's battery subsidiary, FinDreams Battery, is targeting production of roughly 1,000 vehicles using sulfide-based all-solid-state cells in 2027, according to FinDreams CTO Sun Huajun's remarks at the China All-Solid-State Battery Innovation and Development Summit earlier this year. BYD itself has characterized the program as a "technology demonstration stage," not a commercial launch.

Those 1,000 cars will likely go to buyers of BYD's premium Yangwang and Denza brands to gather real-world performance data, according to reporting from ChinaEVHome and Electrek. Mass production at commercial scale isn't expected until around 2030, with the technology trickling down to BYD's mainstream, higher-volume lineup sometime between 2030 and 2032.

BYD's chosen chemistry is a sulfide-based electrolyte, specifically an inorganic compound called LPSC, lithium phosphorus sulfur chlorine, according to Tech Times. ChinaEVHome reports BYD began early solid-state research in 2016, shifting focus toward the sulfide route after 2018, and is now targeting a cell energy density of 400 Wh/kg, more than double the density of BYD's current mass-produced Blade batteries.

On the manufacturing side, ChinaEVHome reports BYD's 2 GWh pilot line in Pingshan, Shenzhen came online in February 2026 with a yield rate now above 90%, while construction of a 20 GWh mass-production line in Bishan, Chongqing was scheduled to begin in the third quarter of 2026. A prototype tested by the China Automotive Technology and Research Center reportedly hit a CLTC combined range of 1,218 kilometers, described as a domestic record for a solid-state battery vehicle.

The Skeptic's Case, Stated Fairly

Solid-state batteries have been promised as imminent for well over a decade. Electrek put it bluntly: automakers claiming another breakthrough "just around the corner" has become something of an industry joke, with Toyota among the repeat offenders on delayed timelines.

That skepticism is reasonable. A 1,000-car demonstration fleet running for real-world data collection is a meaningfully different thing than a battery ready for an assembly line building hundreds of thousands of cars a year. The jump from small-batch validation to true mass production, at yield rates and costs that make economic sense, has tripped up battery makers before. BYD's own chief scientist, Lian Yubo, said at an April conference that solid-state batteries have reached a "critical stage" but that hurdles remain before commercialization, according to Electrek.

BYD is not alone in this. CATL and GAC have set similar public timelines: small-scale demonstrations in the 2027-2028 window, broader adoption not expected until after 2030, according to ChinaEVHome. That consistency across three separate Chinese battery and automaker programs suggests the 2027 demonstration/2030 mass-production framework reflects a real industry consensus on the engineering timeline, not just BYD marketing spin.

What's Actually New Here

Li's comments add a corporate commitment date from BYD's most senior public-facing executive, tying the company's reputation to hitting 2027. BYD is simultaneously pushing hard on unrelated but tangible near-term tech. Its 5-minute Flash Charging system is already shipping on the Denza Z9 GT in Europe, and Li separately told Carwow.es she expects China to introduce L3 autonomous driving regulations in July 2027.

The open question is whether BYD names the actual 2027 demonstration vehicle, publishes real specifications, and lets independent testers verify range and charging figures once the 1,000-car batch is on the road, rather than relying on internal CATC test results and executive assurances. Until BYD discloses a model name and third-party-verified performance data, the 2027 claim remains a company commitment, not an independently confirmed product.