In response Musk replied today that the company could do it in 100 days of the contract being signed, or else provide it free, adding: "That serious enough for you?"
Mr Musk, who runs electric vehicle giant Tesla, which recently merged with his solar energy outfit SolarCity, was responding to Atlassian boss Mike Cannon-Brookes who tweeted "Holy s#%t" in reference to the plans.
In a follow-up tweet, Musk offered Cannon-Brookes a pricing quote for the project: $250 per kilowatt-hour of energy for 100-megawatt-hour systems, according to Reuters, which amounts to a total of $25 million for the batteries.
In a Twitter conversation Thursday with Australian tech billionaire Mike Cannon-Brookes, Musk bet he could get the systems up and running within 100 days, although Cannon-Brookes might want Musk to go slightly over his target. Although considering the heat wave now plaguing the state, even Musk's aggressive timetable won't be fast enough.
If he fails the task, Elon Musk says that he'll complete the work for free. The state's Port Augusta power plant shut down last May, taking with it 520 megawatt-hours of generating capacity. He plans to do the same by building a massive 100 MW battery storage farm in the said time frame.
To this, Atlassian CEO tweeted, "You're on mate".
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Meanwhile, West Ham have gradually improved in 2017 with 11 points out of their last possible 18, and are now unbeaten in their last three league games.
South Australia's population of 1.7 million people suffer regular power cuts and energy shortages.
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Battery storage would help prevent further blackouts by increasing the peak amount of energy available to the grid.
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It also said that the company could do the same in the neighboring state of Victoria, which lingers under the risk of frequent blackouts after the recent closure of the Hazelwood coal-fired power station.