Tesla (TSLA) has "fully installed" the world's largest lithium ion battery in South Australia, the state government said in a statement on 23 Nov 2017.
Tesla teamed up with a French renewable energy firm and the local government to install the battery, which Musk promised to deliver within 100 days of signing a contract -- or it would be free.
The battery needs to be operational by early December for Musk to meet his own deadline.
"Congratulations to the Tesla crew and South Australian authorities who worked so hard to get this manufactured and installed in record time!" Musk tweeted Thursday.
The battery will store power generated by a wind farm in South Australia, releasing it during times of increased demand.
It is slated to be three times more powerful than its nearest competitor, and is now being tested to ensure it meets federal and state requirements.
The project "sends the clearest message that South Australia will be a leader [in] renewable energy with battery storage," state premier Jay Weatherill said in a statement. "An enormous amount of work has gone in to delivering this project in such a short time."
The ambitious timeline dates back to a bet made in March, when billionaire entrepreneur Mike Cannon-Brookes threw down the gauntlet to Musk, asking if Tesla was serious when it claimed it could quickly end blackouts in South Australia.
