Naval Group has proposed the Scorpéne Evolved to the Indian Navy, a next-generation upgrade that represents a major technological advancement over the existing Kalvari-class submarines. The offering is intended to bridge the capability gap between Project-75 and the upcoming Project-751, while leveraging India’s current submarine production ecosystem.
A key feature of the Scorpéne Evolved is the transition to full Lithium-Ion Battery (LiB) propulsion, replacing traditional lead-acid systems. This shift significantly enhances endurance, stealth, and operational flexibility. Unlike conventional diesel-electric submarines that require frequent snorkeling, the LiB-powered variant is expected to sustain extended submerged missions of up to 78–80 days. Faster charging cycles further reduce exposure at periscope depth, improving survivability in high-threat environments.
The use of LiB technology also removes the need for bulky Air Independent Propulsion (AIP) systems, simplifying internal architecture while maintaining or improving performance. With fewer moving parts, the platform is expected to achieve lower acoustic signatures, especially during high-speed operations. Additionally, the introduction of a permanent magnet motor is expected to improve propulsion efficiency, reduce noise, and enhance power delivery.
One of the most significant proposed upgrades is the integration of a Vertical Launch System (VLS) capable of accommodating BrahMos-NG missiles through a dedicated hull section. This would provide India’s Scorpéne fleet with a vertical supersonic strike capability not currently present in other variants.
The proposal aligns with India’s industrial strategy by utilizing the existing Mazagon Dock Limited production line for follow-on submarines, ensuring continuity while upgrading capabilities. With an indigenous content target exceeding 60 percent—including the potential use of locally produced lithium-ion batteries—the program supports domestic industry growth. Naval Group is also drawing on its Indonesian submarine program to offer a standardized yet advanced design, reducing development risk while delivering a modern, combat-ready platform.
