<p>Elon Musk announced a project to build the world’s largest lithium-ion battery in South Australia on July 7. And if the $33 million project isn’t delivered in under 100 days, the Tesla founder said it would be free.</p><p>In a bid to secure the state’s energy future, the South Australian government made a “historic agreement” with Tesla and renewable energy provider Neoen to install a 100-megawatt battery. The battery would store power generated from Neoen’s 99-turbine wind farm at Hornsdale, according to the Adelaide Advertiser</a>.</p><p>Musk said the battery would be three times more powerful than any other energy storage system on earth.</p><p>The video shows Musk and Neoene’s Deputy Chief Executive Romain Desrousseau with South Australia’s Premier Jay Wetherill at a press conference in the Adelaide Oval.</p><p>The ABC reported</a> that the 100 day countdown will start once the grid interconnection agreement has been signed. Credit: Jay Weatherill via Storyful</p><br />