The fourth annual meeting of the International Solar Alliance (ISA) is beginning today in New Delhi, with the task of planning the roll out of a $1 trillion plan to build solar power plants over the next 10 years.

Delegates to the conference will include John Kerry, the US climate change envoy, Frans Timmermans, executive vice-president for the European Green Deal, Riccardo Puliti, the World Bank’s infrastructure vice president, UK business secretary Kwasi Kwarteng and France’s ecological transition minister Barbara Pompili.

The aim of the conference is to add operational and technical detail to the ISA’s “One Sun, One World, One Grid” programme. This will include discussions of financial risk management and ways of attracting the private sector capital that will be needed to fill the “viability gap” between member countries’ ambitions and what they can fund themselves.

At the end, the ISA hopes to have a five-year plan setting out what each of the ISA’s 98 member states hope to achieve.

Ajay Mathur, the alliance’s director general, said in a press statement: “The ISA is stepping into the next phase of its mission, driven primarily by the implementation of its framework for global solarisation, scaling and expanding the impact of its interventions across nations, and growing and actualising its existing pipeline for solar projects.