Hyundai Unveils World’s First Hydrogen-Powered Stealth Battle Tank
South Korea may become the first nation to develop and deploy fully hydrogen fuel cell-powered main battle tanks. Hyundai’s subsidiary Rotem has unveiled its vision for the future of ROK’s K-series tanks: hydrogen powertrains. The next version, the K3, will feature hydrogen fuel cells and advanced tech to become highly sophisticated.

K3: The Next Generation Battle Tank
Developed with Korea’s Agency for Defense Development and other research institutions, the K3 could enter production by 2040. It will replace the diesel engines of current K-series tanks with hydrogen fuel cells in a phased approach. Early prototypes will feature hybrid hydrogen and diesel engines, aligning with South Korea’s goal to shift away from combustion.
Transitioning from Diesel to Hydrogen

Hyundai Rotem describes the K3 as surpassing the capabilities of today’s tanks, optimized for future warfare demands. Key features include improved stealth, autonomous driving, slave drones, a new 130-mm main gun, and AI-based fire control.
Advanced Features of the K3
Beyond sustainability, hydrogen fuel cell technology offers several advantages for the K3 compared to traditional diesel tanks:
- Reduced heat signature, making it harder to detect
- Dramatically quieter operation for improved stealth
- Greater acceleration and mobility on the battlefield
- Superior fuel economy, extending operational range
- Simplified maintenance due to fewer moving parts
- Enhanced traversal of steep and rugged terrain

Advantages of Hydrogen Power
The K3 will have a crew of three (driver, commander, gunner) in a heavily armored front capsule. Its unmanned turret will feature a remotely controlled 130mm cannon, engaging targets up to 3 miles away. Multi-purpose ATGMs with a 5-mile range and a remote weapons station (12.7mm-30mm) provide additional firepower.
Crew Protection and Firepower
The tank will also have advanced modular armor composed of steel, ceramic, and composites for maximum protection. As South Korea pioneers this hydrogen-powered battle tank technology, it marks a significant evolution in military vehicles’ sustainability and battlefield performance.