Billionaire Elon Musk has entered South Australia’s energy debate.

Mr Musk has been in Australia to plug Tesla's Powerwall 2 and Powerpack 2 battery products.

On Friday last week, Mr Musk said the state’s energy problems were linked to storage, not supply.

He proposed building a 100 MW battery farm to store and distribute power from SA’s significant renewable sources, and even pledged to finish the work within 100 days, or it would be free.

Australian billionaire Mike Cannon-Brookes, co-founder of software company Atlassian, said he could “make the $ happen”, offering “mates rates” if Mr Musk came through on the 100-day claim.

The Tesla founder then moved on to hold talks with SA Premier Jay Weatherill, later tweeting that the State Government was committed to a “smart, quick solution”.

He then spoke to Prime Minister Malcolm Turnbull, whose office later issued a statement saying: “The pair had an in-depth discussion on the value of storage and the future of the electricity system”.

No information has yet been provided about the technical specifications of the battery farm, or what it would cost, but Tesla has completed a battery farm in Southern California using an array of 400 Powerpack 2 batteries.

Greens Senator Hanson-Young said the proposition would require rules set by the market operator to be changed.

She said battery storage options are prevented from being competitive in the electricity market.

“The way the spot market works and way the electricity market is currently structured means that battery storage just can't compete at the same level,” Senator Hanson-Young said.