Prime Minister Jay Weatherill said the testing of massive lithium-ion batteries will begin a few days before Musk signed the project earlier this year to set its December 1 deadline for itself.
Musk promised to build batteries in Jamestown in the middle of the state.
North, free if not completed within 100 days.
He estimated it would cost at least $65. 5 million.
Entrepreneurs behind electric car maker Tesla made the promise to deal with the power crisis in southern Australia.
After a "unprecedented" storm, a wide range of power outages ripped the transmission tower from the ground.
"South Australia will return-
Powered this summer through the world's largest lithium-ion battery, which will be powered on for the first time in the next few days as it enters the regulatory testing phase, Mr. weatherill said in a statement later on Thursday.
Musk's Tesla Powerpack is connected to a wind farm operated by French energy company Neoen and is expected to provide enough power to thousands of families during the period of excess demand, which maySouth Africa-
Musk was born as the founder of payment company PayPal, electric vehicle maker Tesla motor and rocket and spacecraft maker and launcher SpaceX.
He is also the chairman of solar panel installer SolarCity, recently acquired by Tesla.
Musk envisioned Tesla as a company that could help reduce emissions not only by selling electric cars to people, but also by producing and storing solar energy.
Due to the heavy use of coal, Australia is one of the most polluted countries in the world with greenhouse gas per capitafired power.