Elon Musk’s Tesla is installing the world’s largest grid scale battery in South Australia, and the company’s CEO is fully aware of how much the project’s success means in terms of the technology’s credibility.

The battery is to be paired with a wind farm provided by France’s Neoen, in a major test of the reliability of large-scale renewable energy use.
Elon Musk
The Australian state has faced a lot of problems, as a result of its decision to fully embrace wind power, while failing to maintain a coal power back-up. The result has been outages, but Tesla’s technology could store the energy required to prevent such blackouts recurring.

The project is designed to have a storage capacity of 129 megawatt-hours, which is enough to light up 30,000 homes, a Tesla spokesman told Reuters.

Under the terms of the agreement, Tesla must deliver the 100-MW battery within 100 days of a contract being signed or it’s free, matching a commitment made by Tesla CEO Elon Musk in a Twitter post in March.

“There will be a lot of people that will look at this, ‘did they get it done within 100 days? Did it work?'” Mr Musk told reporters in South Australia’s capital city of Adelaide. “We are going to make sure it does.”

The 100-day deadline will begin within a few weeks, a political source said, after a connectivity agreement is reached between South Australia, Telsa, Neoen and the Australian Energy Market Operator.

Mr Musk said a failure to deliver the project in time would cost his company “$50m or more”, without elaborating.

The battery, designed to provide emergency back-up power if a shortfall in energy is predicted, will be built on site in South Australia, a spokesman for the state government said.