International Solar Alliance
Launched by India and France at COP21 in Paris.
Written by Pratidin; every fact checked by a separate review before publishing. How we work
Headquartered in Gurugram.

Quick recall
- Who launched the ISA?
- India and France.
- When?
- At COP21, 2015.
- Where is its headquarters?
- Gurugram, India.
- Who can join now?
- All UN member states, since 2020.
- What is OSOWOG?
- One Sun One World One Grid, a global solar grid vision.
- Which treaty-based body does it resemble?
- It is a treaty-based international organisation.
Asked before in UPSC
Recurring theme: India's climate diplomacy and solar energy leadership
The ISA, launched by India and France at COP21 in 2015, is a key example of India's shift to leadership in climate fora.
Directly tests the ISA link to the One Sun One World One Grid idea behind the Green Grids Initiative.
Tests the ISA's COP21 launch and that its membership is not universal.
The basics
Why it matters
The International Solar Alliance, launched by India and France at COP21 in 2015, promotes solar energy among member countries. It is headquartered in Gurugram, India.
How it evolved
Key milestones.
- 2015Launched at COP21
- 2017Framework Agreement enters into force
- 2018First Assembly
- 2020Opened to all UN members
- 2021One Sun One World One Grid launched at COP26
You now know
- Launched by India and France at COP21 in 2015.
- Headquarters: Gurugram, India.
- Membership opened to all UN member states in 2020.
- Linked to the One Sun One World One Grid initiative.
Go deeper
In one line: The ISA is India's flagship climate diplomacy institution.
Why it matters for UPSC
It shows India's leadership in Solar energy.
The core idea
It pools demand and finance, and promotes One Sun One World One Grid.
Where to go next
- Solar energy: India's solar expansion
- One Sun One World One Grid: A connected global solar grid
In one line: The ISA's impact depends on mobilising finance for poorer members.
Work
Solar parks, training and risk mitigation. See Solar energy and One Sun One World One Grid.
Where to go next
- Solar energy: India's solar expansion
- One Sun One World One Grid: A connected global solar grid
Solar energy
India's solar expansion
In one line: India has become one of the largest solar markets.
Targets
Part of 500 GW non-fossil capacity by 2030.
Schemes
PM Surya Ghar for rooftop solar, and PLI for solar modules.
Where to go next
- One Sun One World One Grid: A connected global solar grid
One Sun One World One Grid
A connected global solar grid
In one line: OSOWOG envisions interconnected grids sharing solar power across time zones.
Launch
The Green Grids Initiative-OSOWOG at COP26 (2021) with the UK.
Where to go next
- Solar energy: India's solar expansion
Prelims-style quiz
The ISA is headquartered in:
- Geneva
- Paris
- New Delhi
- Gurugram
Show answer
Answer: (d) Gurugram. Gurugram.
Consider the following:
1. The ISA was launched at COP21.
2. Only tropical countries can join.
Which of the statements given above is/are correct?- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
Show answer
Answer: (a) 1 only. Membership was opened to all UN members in 2020.
The ISA was launched by India and:
- France
- USA
- Germany
- Japan
Show answer
Answer: (a) France. France.
OSOWOG stands for:
- None
- One Sun One World One Grid
- Open Solar One World Organisation
- One Solar One World Order Group
Show answer
Answer: (b) One Sun One World One Grid. One Sun One World One Grid.