International Solar Alliance (ISA) - Origin, Objectives, India's Leadership, and Climate Diplomacy

International Solar Alliance (ISA) - Origin, Objectives, India's Leadership, and Climate Diplomacy for UPSC

The International Solar Alliance (ISA) is one of India's most visible and practical climate-diplomacy initiatives. It links clean energy transition with development needs—especially for countries that have abundant sunlight but face barriers like high cost of capital, weak grids, and limited project-preparation capacity. For UPSC, ISA is important for Prelims (facts, institution, headquarters, membership idea) and Mains (India's global leadership, climate justice, South–South cooperation, energy security, and green growth).

Definition Box (Exam-Ready)

International Solar Alliance (ISA): A treaty-based intergovernmental organisation launched by India and France to promote rapid and large-scale deployment of solar energy, primarily by reducing financing and technology barriers, building capacity, and enabling collaboration among member countries—especially in the solar-rich regions of the world.

OSOWOG (One Sun One World One Grid): A global vision to interconnect solar energy grids across regions and time zones, enabling 24/7 solar power supply by leveraging the sun's continuous presence across the globe.

Framework Agreement: The founding treaty of ISA that gives it legal status as an international organisation.

Solar Insolation: The measure of solar radiation energy received on a given surface area in a given time.

Paris Agreement: The 2015 global climate pact under UNFCCC that ISA supports through implementation-oriented action.

INDCs: Intended Nationally Determined Contributions—voluntary climate commitments by countries under the Paris Agreement.


1. Why ISA Matters for UPSC


2. Background: The Global Context Behind ISA

The ISA emerged from a reality that many countries face:

ISA therefore aims to make solar adoption easier, cheaper, and faster by addressing the "enabling ecosystem" around solar energy—not just installing panels.


3. Origin and Evolution of ISA

3.1 Launch and Founding Idea

ISA was launched by India and France on the sidelines of the Paris Climate Conference (COP21) in 2015. The core idea was simple: countries with abundant sunlight should collaborate to unlock solar energy at scale.

3.2 The "Sunshine" Geography Logic

ISA initially focused on countries located in the solar-rich belt broadly between the Tropic of Cancer and the Tropic of Capricorn, where solar irradiance is generally strong and consistent across seasons—making solar a natural development solution.

3.3 Treaty-Based Organisation

ISA moved beyond a political announcement by adopting a framework agreement, making it a treaty-based intergovernmental organisation. This matters for UPSC because it indicates:

3.4 Headquarters and Secretariat

The ISA Secretariat is located in Gurugram (Haryana), India, reflecting India's leadership and commitment to institution building.

AspectKey Point (UPSC)
FoundersIndia and France
Launched2015 (COP21, Paris)
Framework Agreement OpenedNovember 2016, Marrakech (COP22)
Entry into ForceDecember 2017
NatureTreaty-based intergovernmental organisation
HeadquartersGurugram, Haryana (India)
Membership Expansion2020 amendment—all UN member states eligible
Core FocusScaling solar deployment by reducing barriers (finance, capacity, standards, collaboration)

4. Objectives of ISA

ISA's objectives can be understood in four layers: deployment, finance, capability, and cooperation.

4.1 Accelerate Solar Deployment

4.2 Improve Access to Affordable Finance

4.3 Build Capacity and Enable Ecosystems

4.4 Promote Technology and Innovation Cooperation

ObjectiveWhat It Means PracticallyUPSC Link
Scale deploymentMore solar projects, faster adoptionEnergy transition, SDGs
Affordable financeLower interest, lower risk, more investmentClimate finance, development
Capacity buildingSkills, institutions, policy supportHuman capital, governance
CollaborationShared learning, partnerships, standardsMultilateralism, South–South cooperation

5. Governance and Institutional Structure

ISA is designed for coordination and implementation support (not as a regulator). Its governance typically includes:

UPSC angle: ISA's structure shows how modern international institutions increasingly focus on implementation support and coalition-based delivery, not just negotiations.


6. ISA Programmes and Initiatives

ISA works through specific programmes designed to address barriers to solar deployment:

6.1 Solar Technology Application Resource Centres (STARCs)

6.2 Solar Risk Mitigation Initiative

6.3 Blended Finance Mechanism

6.4 Global Solar Facility


7. OSOWOG: One Sun One World One Grid

OSOWOG is a visionary initiative to create an interconnected global solar grid. The concept recognizes that the sun is always shining somewhere on Earth, and interconnected grids could enable 24/7 solar power supply.

7.1 Green Grids Initiative - OSOWOG (GGI-OSOWOG)

7.2 UPSC Relevance of OSOWOG


8. Membership and Growth

ISA has grown into one of the largest international alliances focused on a single sector:

RegionExamples of Member Countries
AfricaAlgeria, Kenya, Nigeria, Ethiopia, South Africa
Asia-PacificIndia, Japan, Australia, Bangladesh, Myanmar
EuropeFrance, Spain, Malta, Netherlands, Italy
AmericasBrazil, Argentina, Cuba, Peru
Caribbean & SIDSVarious Small Island Developing States

Key milestone: In 2020, ISA's membership was opened to all UN member states (earlier limited to countries between Tropics). This expanded ISA's reach and relevance globally.


9. India's Leadership in ISA

India's leadership in ISA is not only symbolic; it is practical and institutional. It aligns with India's broader strategy of being a solution provider in the Global South and a bridge-builder in global climate negotiations.

9.1 Norm Entrepreneurship: Shaping the Global Narrative

9.2 Institution Building: Hosting the Secretariat

9.3 Development Partnership: Solar as a Tool of Cooperation

9.4 Strategic Partnership with France

Co-founding ISA with France is significant because it:


10. ISA as an Instrument of Climate Diplomacy

Climate diplomacy is not only about negotiating agreements; it is also about building coalitions that enable implementation. ISA helps India in climate diplomacy in multiple ways:

10.1 From "Burden Sharing" to "Opportunity Sharing"

10.2 Strengthening India's Voice on Climate Finance

10.3 Coalition Leadership and Multilateral Credibility

10.4 Strategic Soft Power

Diplomatic ValueHow ISA Contributes
Leadership of Global SouthCoalition around practical development needs (energy access, finance)
Bridge-buildingIndia–France co-leadership model; partnerships with global institutions
Climate justice narrativeFocus on implementation support and equity in energy transition
Strategic soft powerVisible benefits of solar projects improve goodwill and trust

11. Challenges and Limitations

For Mains answers, always write challenges in a structured manner: finance, pipelines, infrastructure, and geopolitics.

11.1 Finance and Risk Perception

11.2 Bankable Project Pipeline

11.3 Grid and Storage Constraints

11.4 Domestic Constraints in Member Countries

11.5 Supply Chains and Technology Dependence


12. Way Forward: How ISA Can Become More Impactful

12.1 Make Finance Cheaper and More Accessible

12.2 Strengthen Project Preparation Support

12.3 Integrate Storage, Grids, and New Sectors

12.4 Scale Skills and Local Ecosystems

ChallengeWhat ISA Can Do
High cost of capitalBlended finance, guarantees, standardised procurement, risk mitigation
Weak project pipelineProject preparation support, templates, capacity building
Grid integrationPlanning support, solar+storage frameworks, technical cooperation
Skill gapsTraining, certification, institutional partnerships
Supply-chain vulnerabilityEncourage diversification, standards, innovation partnerships

13. Quick Revision Notes for Prelims


14. PYQs and Practice Questions

UPSC Practice Question (Prelims)

With reference to the International Solar Alliance (ISA), consider the following statements:
1) It was launched by India and France on the sidelines of COP21 in 2015.
2) Its Secretariat is located in Gurugram, India.
3) Its primary purpose is to scale up solar deployment by reducing barriers like finance and capacity constraints.
Which of the statements given above are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Answer: (d) 1, 2 and 3

UPSC Practice Question (Mains - 150 words)

"International Solar Alliance is an example of India's climate diplomacy shifting from negotiation to implementation." Explain. Mention how ISA supports climate justice and development needs.

UPSC Practice Question (Mains - 250 words)

Discuss the origin and objectives of the International Solar Alliance (ISA). Evaluate India's leadership role in ISA and critically analyse the challenges that limit ISA's impact. Suggest a way forward.


15. MCQs with Answers

  1. Which year was the ISA launched?

    • (a) 2013
    • (b) 2015
    • (c) 2017
    • (d) 2018

    Answer: (b) 2015

  2. The ISA Framework Agreement was opened for signatures in:

    • (a) Paris
    • (b) Marrakech
    • (c) New Delhi
    • (d) Tokyo

    Answer: (b) Marrakech

  3. Where is the ISA headquartered?

    • (a) Paris
    • (b) New Delhi
    • (c) Gurugram
    • (d) Brussels

    Answer: (c) Gurugram

  4. OSOWOG stands for:

    • (a) One Sun One World One Grid
    • (b) One State One World One Goal
    • (c) One Solar One World One Government
    • (d) One Source One Wind One Grid

    Answer: (a) One Sun One World One Grid

  5. ISA aims to mobilise how much investment by 2030?

    • (a) USD 100 billion
    • (b) USD 500 billion
    • (c) USD 1 trillion
    • (d) USD 2 trillion

    Answer: (c) USD 1 trillion

  6. Which programme focuses on capacity building through training centres?

    • (a) STAR-C (Solar Technology Application Resource Centres)
    • (b) GCF
    • (c) CDM
    • (d) LDC Fund

    Answer: (a) STAR-C

  7. All UN member states became eligible to join ISA after amendment in:

    • (a) 2018
    • (b) 2020
    • (c) 2022
    • (d) 2024

    Answer: (b) 2020

  8. The Green Grids Initiative - OSOWOG was launched at:

    • (a) COP21, Paris
    • (b) COP25, Madrid
    • (c) COP26, Glasgow
    • (d) COP27, Sharm el-Sheikh

    Answer: (c) COP26, Glasgow

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