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Science & Technology April 20, 2026 5 min read Daily brief · #2 of 6

Armed Forces eye biogas, solar to cut fuel use amid West Asia crisis

The Indian armed forces are actively exploring biogas and solar power projects on unused defence land to reduce reliance on imported fossil fuels, with a pil...

GS Paper 3 (Internal Security Environment Science & Technology)

What Happened

  • The Indian armed forces are actively exploring biogas and solar power projects on unused defence land to reduce reliance on imported fossil fuels, with a pilot project for a solar plant on defence land in collaboration with a public-sector energy partner already at the detailed project report stage.
  • The initiative is driven partly by the West Asia crisis, which has exposed the vulnerability of maritime fuel supply chains, and by India's broader strategic interest in energy self-sufficiency at forward bases.
  • The Indian Army has signed a Power Purchase Agreement with NTPC for a solar-hydrogen microgrid at Chushul, Ladakh — the first such installation inaugurated in November 2025 — replacing diesel gensets at off-grid locations and saving approximately 1,500 tonnes of CO₂ per year.
  • The Indian Air Force has begun trialling biofuel blends in transport aircraft, with local biogas generation providing a buffer against maritime chokepoint disruptions such as those near the Strait of Hormuz.
  • The armed forces have approximately 46,000 acres of unused defence land identified for green energy projects including solar, wind, biogas, afforestation, and carbon credit generation.

Static Topic Bridges

Defence Energy Security and Fuel Logistics Vulnerability

Energy logistics is a critical vulnerability for any military. India's forward bases — especially in high-altitude regions like Ladakh — depend on road convoys and air-lift for diesel, both expensive and risky under operational conditions. The shift to on-site renewable generation eliminates this logistics chain and enhances operational resilience against blockades, extreme weather, and supply disruptions.

  • NTPC's Chushul solar-hydrogen microgrid supplies 200 kW round-the-clock at an off-grid army location, replacing diesel gensets.
  • The project uses green hydrogen as an energy storage medium — solar energy during the day charges electrolysers, hydrogen is stored and used for power at night.
  • The West Asia crisis (2026) highlighted risks to oil transit through the Strait of Hormuz, accelerating India's defence energy transition.
  • India imports approximately 85% of its crude oil, making strategic fuel stockpiling and decentralised military energy generation a security imperative.

Connection to this news: The armed forces' push for biogas and solar is a direct operational response to both a geopolitical supply risk (West Asia) and a structural logistics cost challenge at remote forward bases.

India's Renewable Energy Targets and the Defence Sector's Role

India has set a target of 500 GW of installed renewable energy capacity by 2030, under its Nationally Determined Contributions (NDC) to the Paris Agreement (updated in 2022). The defence sector, as a large land-holder and energy consumer, is increasingly integrated into this national strategy.

  • India's installed non-fossil-fuel power capacity crossed 505 GW by late 2025, with non-fossil sources exceeding 50% of total installed capacity.
  • Government has committed to adding 50 GW of renewable energy annually.
  • NTPC Green Energy Limited is a designated Renewable Energy Implementing Agency (REIA) under the Ministry of Power.
  • The armed forces' approximately 46,000 acres of identified surplus land could host substantial solar and biogas installations, contributing to both the national target and operational energy resilience.

Connection to this news: The defence sector's renewable shift aligns with and contributes to India's 500 GW target, creating synergies between internal security and environmental policy.

Biogas in India: Compressed Biogas (CBG) Programme

Compressed Biogas (CBG), also called biogas made from organic waste, is a substitute for compressed natural gas (CNG) and LPG. The Ministry of Petroleum and Natural Gas launched the SATAT (Sustainable Alternative Towards Affordable Transportation) scheme in 2018 to promote CBG production.

  • As of March 2026, there are 1,645 registered CBG projects under SATAT, with 201 commissioned plants and 319 under construction.
  • The Union Budget 2026-27 excluded the value of biogas from central excise duty on blended CNG, improving project economics.
  • CBG plants can use agricultural residue, cattle dung, municipal solid waste, and sewage — making them suitable for cantonment areas and large military bases that generate organic waste.
  • 1 tonne of organic waste can produce approximately 40-50 m³ of biogas, which can be compressed and used for vehicles or power generation.

Connection to this news: Military installations and cantonments are high-waste-generating facilities well-suited to on-site biogas generation, reducing both waste disposal costs and diesel dependence.

Integrated Defence Energy Policy: The Strategic Dimension

India does not yet have a standalone "Defence Energy Policy," but several policy frameworks converge: the National Mission for Enhanced Energy Efficiency, India's updated NDCs, the Ministry of Defence's sustainability framework, and the Defence Acquisition Procedure (DAP) 2020, which promotes indigenisation.

  • The Defence Acquisition Procedure (DAP) 2020 emphasises "Make in India" for defence procurement, including energy systems.
  • NTPC, a Navratna Central Public Sector Enterprise, is the key PSU partner for defence-sector green energy projects.
  • India's Military Engineering Services (MES) is tasked with infrastructure, including energy systems, at cantonments and forward bases.
  • The Solar Energy Corporation of India (SECI) and NTPC Green are both implementing agencies for large-scale renewables on defence land.

Connection to this news: Institutionally, the armed forces' biogas and solar initiative represents a convergence of the indigenisation drive, the renewable energy mission, and operational energy security under a single strategic imperative.

Key Facts & Data

  • 46,000 acres of unused defence land identified for green energy projects
  • 1,645 registered CBG projects under SATAT scheme (as of March 2026)
  • 200 kW power supply capacity of NTPC-Army solar-hydrogen microgrid at Chushul, Ladakh
  • 1,500 tonnes/year CO₂ saving from the Chushul microgrid replacing diesel gensets
  • 500 GW India's renewable energy target by 2030 (updated NDC, 2022)
  • 505 GW India's installed power capacity as of late 2025, with non-fossil sources exceeding 50%
  • 85% share of crude oil India imports — key driver of energy security concerns
  • SATAT scheme launched: 2018 (Ministry of Petroleum and Natural Gas)
  • DAP 2020 promotes defence indigenisation including energy systems
On this page
  1. What Happened
  2. Static Topic Bridges
  3. Defence Energy Security and Fuel Logistics Vulnerability
  4. India's Renewable Energy Targets and the Defence Sector's Role
  5. Biogas in India: Compressed Biogas (CBG) Programme
  6. Integrated Defence Energy Policy: The Strategic Dimension
  7. Key Facts & Data
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