India’s green hydrogen strategy is expanding beyond electricity generation to decarbonise hard-to-abate industries and establish domestic manufacturing, according to ET EnergyWorld — Renewable. As outlined by Abhay Bakre, Mission Director of the National Green Hydrogen Mission, this strategic direction unlocks an estimated investment opportunity of ₹8-10 lakh crore. Although plant-specific capacities, allocation quotas, and deployment timelines have not been disclosed, an investment program of this magnitude demands rigorous plant-level engineering to bridge intermittent renewable energy generation with rigid industrial requirements.

Electrolyser Sizing, Storage Buffering, and Dynamic Power Conditioning

Targeting hard-to-abate industrial sectors, such as refining, chemical synthesis, and primary metallurgy, alters the foundational design criteria of hydrogen production facilities. Unlike intermittent grid balancing, industrial offtake demands continuous, steady hydrogen delivery. Plant engineers must navigate several interrelated technical constraints:

• Electrolyser oversizing and duty management: Because industrial chemical processes cannot tolerate fuel starvation, electrolyser capacity must be oversized relative to average demand to produce surplus gas during peak generation periods. Operating stacks across broad turndown cycles places severe stress on cell components, accelerating catalyst degradation and membrane thinning.
• Intermediate storage integration: To protect continuous downstream processes against renewable intermittency, facilities require dedicated buffer storage. Engineers must integrate high-pressure storage vessels or underground formations to decouple fluctuating electrolyser output from steady industrial consumption.
• Power conditioning and conversion efficiency: Coupling electrolysers with renewable generation demands robust rectifiers and transformers that maintain high power quality and low harmonic distortion across fluctuating input voltages. Minimizing electrical conversion losses directly lowers the levelised cost per kilogram of hydrogen produced.

Domestic Manufacturing and Balance-of-Plant Integration

Developing domestic manufacturing capabilities represents a critical pillar of the mission, requiring local supply chains to master both stack fabrication and balance-of-plant subsystems. While proprietary vendor selections and localized component targets have not been disclosed, engineering successful domestic installations requires addressing several critical operational duties:

• Water treatment duty: Electrolysis requires ultra-pure, demineralised water to avoid cell poisoning and membrane contamination. Plant designs must incorporate multi-stage pre-treatment, reverse osmosis, and continuous electrodeionisation systems. In regions facing fresh water scarcity, facilities must also integrate desalination and effluent management, adding operational complexity and auxiliary power loads.
• Balance-of-plant localization: Beyond the core stack, domestic manufacturers must produce high-integrity gas-liquid separators, deoxidation scrubbers, temperature-control exchangers, and gas dryers capable of continuous thermal cycling. Ensuring domestic availability of high-specification balance-of-plant hardware is vital for avoiding extended maintenance downtimes.
• Safety architectures and compression: Integrating green hydrogen into industrial facilities requires multi-stage reciprocating or centrifugal compressors, comprehensive gas detection networks, and automated safety interlocks engineered to maintain plant safety across variable operating pressures.

Converting the projected ₹8-10 lakh crore investment into viable industrial infrastructure requires plant developers to prioritize balance-of-plant optimization, water purification reliability, and dynamic power conditioning alongside core electrolyser manufacturing.

Source

This analysis was written from reporting by ET EnergyWorld — Renewable: Beyond electricity: Why green hydrogen is central to India's energy transition, published 09 October 2026. Figures and events above are as reported there; the engineering commentary is ours.