Elon Musk wants Australia to change its power grid to get ready for more big batteries.

Having deployed the world's largest battery in South Australia and shot a Tesla Roadster into space, the US billionaire's company now wants to change the face of Australia’s National Electricity Market.

Tesla has called for the nation's outdated electricity network to evolve and prepare for a transition to a new power system as part of the Australian Energy Market Commission’s review into the grid’s reliability.

In its submission, the electric car and solar battery maker outlined how when coal-fired power stations have failed – for example during Loy Yang power station generator's recent outages – batteries were able to put power back into the grid and return it to normal operation in less than 200 milliseconds.