Sixty countries had signed up to join the International Solar Alliance, Naidu said, adding that 30 countries had ratified the provisions of the alliance so far.
Today, heads of 23 nations and 10 ministerial representatives gathered in New Delhi for alliance's first summit, which is scheduled to start from Sunday.
In 2015, Prime Minister Narendra Modi in a speech at London's Wembley Stadium proposed the idea of an inter-governmental organisation comprising of 121 countries, which lie either completely or partly between the two Tropics, with an aim to promote solar energy.
French President Emmanuel Macron's India visit is likely to boost Prime Minister Narendra Modi's initiatives on mitigating the effects of climate change with the use of renewable energy.
The global government organisation has got recognition from the United Nations.
Under the agreement, both countries will work on projects in International Solar Alliance (ISA) member countries in the areas of solar energy (solar photovoltaic, storage technologies, etc.) through transfer of technology and collaborative activities.
As of date, there are 121 prospective member countries and territories of ISA, out of which close to 90 countries have signed the ISA Framework Agreement.
It said that as part of a broader bilateral visit after the conference, the Governor-General will meet with business leaders in New Delhi and Chennai, address educational institutions with Australian links, view an Australian-funded aid project in Nizamuddin Basti, officially open an ANZAC (Australia and New Zealand Army Corps) centenary exhibition, and visit an Indian Coast Guard vessel which is playing a role in enhancing regional security.
International Solar Alliance's Interim Secretariat has been set up in Gurugram. "The European Investment Bank welcomes the vision of the International Solar Alliance to ensure those countries most vulnerable to climate change can harness the proven potential of solar power", said European Investment Bank president Werner Hoyer said in a statement. "The leaders underlined their commitment to furthering and deepening concrete projects and programmes under the aegis of ISA to mobilise affordable financing for massive solar energy deployment".