Tesla boss said the project is a great example of how to replace fossil fuels with renewables

• Elon Musk: SpaceX can colonise Mars and build moon base

The clock is ticking on entrepreneur Elon Musk’s promise to build the world’s largest lithium-ion battery in South Australia within 100 days or provide it for free.

But with the facility already half finished, the US billionaire looks set to get paid.

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