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AAP
AAP
Jack Gramenz and Alex Mitchell

Start date questions heat up over $30b solar mega-farm

A solar farm in the Northern Territory is expected to generate 4GW of renewable energy. (Lukas Coch/AAP PHOTOS)

The tech billionaire backing Australia's biggest solar farm has remained coy on details of when building the mammoth project will power ahead after its approval.

The SunCable Australia-Asia Power Link was approved by federal Environment Minister Tanya Plibersek on Wednesday and is expected to generate 4GW of renewable energy, much of which will be exported through an overland and under-sea cable.

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