Via Twitter, Tesla CEO Elon Musk has offered Australia a way to solve a looming problem: go with Tesla Energy products as a way out of its next blackout.

Musk encouraged Australian tech billionaire Mike Cannon-Brookes to bring Powerwall and Powerpack products in to have the necessary energy backup in case of another emergency. The two entrepreneurs dialogued though a series of Twitter posts.

Musk committed to get the energy storage units installed and working within 100 days with a money-back guarantee.

“You’re on mate,” Cannon-Brookes replied, with a special request for “mates rates” on the cost.

Musk later tweeted that Tesla could supply the system at $250 per kilowatt hour, with the total cost coming out to about $25 million. Tesla can supply up to 100 megawatt hours of power through the proposal.

South Australia, an Australian state, was hit by a state-wide blackout during September. That came from severe storm conditions causing electricity transmission failure.

The cause of the energy outage has been fuel for hot political debate and accusations in the country. Australian Prime Minister Malcolm Turnbull blamed in the state’s rapid integration of renewable energy. South Australian Premier Jay Weatherill disagrees, and said that it was caused by the bad weather.

Weatherill tweeted that he’s “looking forward” to discussing the Tesla proposal.

Solar and wind generate about 40 percent of its electricity, which Automotive News says is the highest share of any mainland state.

Renewable energy has been a battleground in Australia, which is the world’s largest exporter of coal. Renewable energy is championed by environmentalists and cleantech entrepreneurs as the solution to the threat of climate change from coal and other carbon-spewing fossil fuels.

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Since 2013, a coalition has been able to dismantle a levy tax on carbon emissions in Australia. The group has also been able to cut goals on how much energy the country will have to generate from wind and solar power by 2020.

Tesla Energy is creating an impressive list of clientele for its energy storage products. The company set up created a 13 megawatt “solar farm” on the Hawaiian island of Kauai to generate electricity onto solar panels. That power is stored in a 52 MWh Tesla Powerpack setup.

Another interesting contract has been with the Southern California Edison. In February, the two companies opened up the world’s largest battery storage facility. The location at the SCE utility’s Ontario, Calif., station hosts about 400 Tesla PowerPack units on a 1.5-acre site. It can store enough energy to power 2,500 homes for a day or 15,000 homes for four hours, the companies said.

Automotive News