Tesla has completed its 100 megawatt Powerpack battery backup system in South Australia within 100 days (easily), as Elon Musk had promised. That means the company essentially won the "bet," and won't be on the hook for the entire cost of the project, estimated at $50 million. More importantly, it means that some 30,000 homes in South Australia will have a power backup in case there's no breeze at the Hornsdale Wind Farm located about two hours from Adelaide.
"An enormous amount of work has gone in to delivering this project in such a short time," said South Australian Premier Jay Weatherill in a statement. "The world's largest lithium ion battery will be an important part of our energy mix."
Musk famously promised to build the Powerpack-based system in 100 days, but that now seems more like a savvy PR move than an actual bet. Musk said that the clock would start when the contract was signed, and on that day (September 29th), the project was actually about half done, as the photo above shows. That said, Tesla finished a whopping 45 days ahead of schedule, and if you don't count weekends, Tesla did actually finish the project exactly 99 days after Musk made the initial bet.