The company will also build a 100-200 megawatt solar plant in the former coal town of Moranbah in Queensland State.
The solar push comes as Adani continues to fight legal battles against its beleaguered 21 billion Australian dollars ($15.60 billion) Carmichael coal project in Queensland State's Galilee basin.
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Adani welcomed the decision as a further positive step towards starting major works at the site in the third quarter 2017.
The project has been plagued by delays as environmental activists challenge the mine's approval in the courts, all finding in favour of Adani.
But Adani has said the project will supply higher quality coal for an increased demand in thermal coal, in conjunction with increased solar demand in a growing Indian economy that will lift hundreds of millions of people out of energy poverty.