Australia will partner with India to boost investment in renewable energy, including solar manufacturing, battery and mineral processing, Prime Minister Anthony Albanese said in a meeting with his Indian counterpart on the G20 sidelines.

Australia and India will also look to enhance defense and maritime security cooperation, Albanese said in a meeting with India's Prime Minister Narendra Modi in Rio de Janeiro on Tuesday.

Australia was the largest producer per capita of rooftop solar in the world, and projects with India will include training a rooftop solar workforce as India seeks to boost household use of renewables, Albanese said.

"Our new partnership will boost two-way investment in renewable energy projects like solar PV manufacturing, battery and mineral processing, green hydrogen and green iron," he said, according to an official transcript.

"Australia's relationship with India is also vital to regional security and stability," he added.

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Modi said they were exploring new cooperation on defense industry, critical minerals, renewable energy, ship building, space, according to the transcript.

Australia has rich deposits of copper, vanadium, cobalt and lithium used in electric vehicle batteries.