In a significant move for the electric vehicle industry, SAIC Motor prepares to launch the MG 4X, a new electric SUV featuring semi-solid-state battery technology. This marks the company’s latest advancement since the debut of their mass-produced EV with a similar battery design last year.
Introducing the MG 4X: Semi-Solid-State Battery Revolution
At the previous Chengdu Auto Show, SAIC unveiled the MG4, heralded as “the world’s first mass-produced semi-solid-state” electric vehicle. The MG4’s launch in China saw deliveries begin in December 2025, with the semi-solid-state variant priced at 102,800 yuan ($14,500). In contrast, the standard MG4 model starts at 68,800 yuan ($9,800).
The MG4 lineup offers various battery configurations. Standard models come with either a 42.8 kWh or 53.95 kWh lithium-iron phosphate (LFP) battery, covering distances of 437 km (271 miles) and 530 km (330 miles) under CLTC testing, respectively. The semi-solid-state variant utilizes a 53.95 kWh manganese-based lithium-ion battery, achieving a range identical to the larger LFP option at 530 km (330 miles).
SAIC has announced the forthcoming addition to the MG4 series, the MG 4X, which will also incorporate semi-solid-state battery technology. Initial expectations pointed to a Q2 2026 launch, but blind pre-orders are set to begin on May 11.
According to previous statements by SAIC, the MG 4X will feature a driving range starting at 510 km (316 miles) based on CLTC standards. The China’s MIIT filings indicate the SUV will offer two battery capacities: a 53.9 kWh version similar to the MG4, and a larger 64.2 kWh LFP battery from CATL, which extends the range to 610 km (379 miles).
The base model of the MG 4X is powered by a rear-mounted electric motor delivering 125 kW (167 hp), while higher-end models will offer a more robust 150 kW (201 hp) motor.
In terms of dimensions, the MG 4X exceeds the standard MG4 with a length of 4,500 mm, width of 1,849 mm, and height of 1,621 mm, on a wheelbase of 2,735 mm, making it comparable to the BYD Yuan Plus, also known as the Atto 3 internationally.
The MG 4X interior is packed with modern technology, including a 15.6″ central infotainment display with 2.5K resolution and a smaller driver information cluster. SAIC has collaborated with Chinese tech company Oppo to develop an intelligent cockpit, integrating the latest in safety and convenience features.
Notably, the semi-solid-state battery significantly reduces the risk of combustion by keeping liquid electrolyte content to just 5%, enhancing safety and cycle life. During tests, the battery showcased its safety by producing no smoke, fires, or explosions.
Reports suggest that the MG 4X has already started arriving at Chinese dealerships, anticipating its official launch on May 11. As the MG 4X rolls out in China, plans are in motion to bring this innovative battery technology to Europe by late 2026, under the name MG4 EV Urban, although the WLTP range is expected to be around 400 km (248 miles).
SAIC MG claims to be “setting a new benchmark” as the first to mass-produce semi-solid-state EV batteries. The MG SolidCore Battery has been engineered for diverse conditions and promises improved range, faster charging, and enhanced performance in cold climates.
Original Story at electrek.co