The deal aims to aid China's energy initiatives, including the Paris climate change agreement and its Belt and Road programme.
Irena will collaborate on activities such as improving integration of wind and solar power in China, interconnection and smart grids.
"Providing more electricity – and more renewable electricity – than any other utility in the world, State Grid's extensive experience with grid infrastructure and integrating renewable energy into power systems will help improve understanding of how we can bring larger shares of renewable power online," said Irena director-general Adnan Amin.
SGCC chairman Shu Yinbiao added: "Based on the consensus of advancing the energy transition towards a low-carbon and green energy future, State Grid will implement extensive win-win cooperation with Irena in terms of power grid technology, equipment and international standards."
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