Chinese battery manufacturer Svolt Energy has commenced large-scale production of its 80-kilowatt-hour Fortress 2.0 battery system for plug-in hybrid electric vehicles (PHEVs). The new battery module rolled off the assembly line at Svolt’s Changzhou facility in Jiangsu province, and it is now the highest-capacity PHEV battery available in China.
Compared with the previous 59-kWh generation, the Fortress 2.0 offers a 35.6 percent boost in capacity. Its integrated engineering design yields a 6 percent improvement in both volumetric utilization and energy density, enabling automakers to install larger battery packs without major packaging changes. The system is specifically aimed at larger family vehicles and off-road models.
When paired with D-segment plug-in hybrid platforms, the 80-kWh battery is expected to deliver more than 400 kilometers of pure electric driving range—significantly cutting down on frequent charging for end users. The pack also supports peak 6C fast-charging capability, allowing drivers to regain enough energy for over 400 kilometers of electric range in just 10 minutes of charging.
To enhance thermal safety, Svolt has introduced nano-thermal ceramic insulation materials in the pack design. This feature is engineered to prevent ignition for at least 30 minutes under extreme conditions of up to 1,000 degrees Celsius, bolstering overall system safety.
The company plans to unveil the first vehicle application of Fortress 2.0 at the upcoming Beijing Auto Show later this month. In recent years, PHEV battery capacities in China have grown as automakers and consumers seek to address range anxiety while taking advantage of lower-cost electric driving.
For context, Leapmotor launched its D19 sport utility vehicle in October 2025, offering an extended-range variant with an 80.3-kWh battery from a leading domestic supplier. That model provides up to 500 kilometers of electric range and goes on sale today.
Svolt, which was spun off from Great Wall Motor, held a 1.84 percent share of China’s total power battery installations in March, according to the China Automotive Battery Innovation Alliance (CABIA).
Source: CNEVPost
