The Greens' plan to have South Australia powered by renewable energy by 2030 is a "recipe for jobs creation", party leader Richard Di Natale has said.

Mr Di Natale is in Adelaide spruiking the Greens' energy policy, which would see the state 100 per cent powered by clean energy using wind, solar and solar thermal.

The vision outlines a $15 billion investment in clean energy in the state, which would create between 800 and 1,000 full-time design and construction jobs during the next 15 years.

"This is actually a jobs rich plan," Mr Di Natale said. "It's a pathway to more sustainable long-term employment options for people in South Australia.

"Transitioning to clean energy is the key to unlocking South Australia's economic potential and combating global warming.

"It is a testing time for South Australia. The Whyalla community is facing the possible closure of its major employer, while Port Augusta prepares to close its coal-fired power station.

"Thousands of jobs have been lost in this state, yet our vision for a clean energy future would see this state thrive."

South Australia continues to have the nation's highest unemployment rate at 7.7 per cent.

The Greens' website says the state's flagship project would be a large-scale solar thermal plant in Port Augusta, which would create 50 ongoing jobs.

Its national plan is for at least 90 per cent of energy to be renewable by 2030, the establishment of a $500 million government authority to drive clean energy projects, and a transition fund to assist coal workers and communities with the change.

"The first thing that needs to happen is we need to recognise that coal-fired power generation is a thing of the past," Mr Di Natale told 891 ABC.

He said the party's national blueprint had an ambition of 358 terawatt hours by 2030.

"The key to that plan is acknowledging that we have to increase our supply, not just because of population growth but because there will be widespread electrification of the transport sector," he said.