The MG4 sets a new benchmark as the first compact electric car equipped with a semi-solid-state battery, debuting August 5 in the Chinese market.
A major innovation in electric vehicles
Something is shifting. A mid-range electric vehicle will soon feature a semi-solid-state battery. The milestone belongs to MG, as its new MG4 compact BEV is set to launch in the Chinese market on August 5. Following this domestic debut, the Anglo-Chinese brand is expected to bring the model to Europe, where MG is already enjoying notable success.
What makes the MG4 a breakthrough
The MG4 uses only 5% liquid electrolyte in its battery, enabling ion transfer between anode and cathode while retaining solid-state advantages. The model has undergone standard safety tests, including nail penetration testing, and passed them. According to the manufacturer, the MG4 delivers a range of 537 kilometers under the CLTC (China Light-Duty Vehicle Test Cycle).
With an energy density of 180 Wh/kg, the semi-solid-state battery performs well even in extreme climates. At –7°C, it retains 13.8% more capacity than traditional lithium iron phosphate (LFP) batteries.
Key specs of the MG4
So, what can drivers expect from the new MG4? It features a rear electric motor delivering 120 kW, powered by a 70 kWh battery pack. The new model is 4,395 mm long and 1,842 mm wide, making it longer than its predecessor.
Inside, the infotainment system is powered by MG×Oppo, a collaboration with the Chinese electronics brand. This system supports voice commands, gestures, and smartphone integration.
The real game-changer is the price. In China, the MG4 is expected to retail between €9,600 and €14,400. In Europe, prices will be higher due to tariffs, but the car remains competitively positioned. Production has already started at the SAIC facility in Nanjing, with a European rollout anticipated by the end of 2025.
FLP vs solid-state batteries: what’s the difference?
The MG4’s battery is semi-solid, not fully solid yet, but the automotive industry is steadily moving in that direction. Full solid-state batteries are widely considered the next leap in EV evolution, enabling mass adoption beyond premium models.
Why? Solid-state batteries eliminate flammable liquid electrolytes, significantly lowering fire risks and enhancing safety. They also store more energy in smaller, lighter volumes compared to LFP batteries, offering either greater range or more compact packs. Additionally, solid electrolytes can improve ion transport, allowing for much faster charging times. Their superior chemical stability also extends battery lifespan.
Of course, these benefits come at a higher cost. That’s why many manufacturers still rely on LFP batteries to keep BEV prices accessible. But the landscape is changing, and MG4 might just be the sign of what’s to come.
