The Indian Navy AIP energy module has entered a second commissioning phase, with power production and testing planned before its integration into a Kalvari-class submarine in early 2027, India’s defence ministry said.
Indian Navy AIP module moves toward testing
The ministry announced the start of the “Setting to Work Phase-2” activity on October 24, 2026. The domestically developed air-independent propulsion system is designed to extend the underwater endurance of diesel-electric submarines by reducing their dependence on atmospheric oxygen.
In the next phase, the energy module will be energized to produce power and tested under Navy protocols. It is then due to be handed over to Mazagon Dock Shipbuilders for integration into a Kalvari-class submarine in early 2027. The testing and integration have not yet been completed.
Development and safety
The Naval Materials Research Laboratory, part of the Defence Research and Development Organisation, developed the module. The inauguration took place at Larsen and Toubro’s AM Naik Heavy Engineering Complex in Hazira, Gujarat.
Defence Secretary Rajesh Kumar Singh emphasized meeting the Navy’s induction timelines while maintaining the safety standards required for hydrogen and fuel-cell systems, the ministry said.
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