Steven Marshall sworn in as South Australia's 46th premier

Steven Marshall sworn in as South Australia's 46th premier

"I think most South Australians are very keen to see some change and that's certainly the vibe that we picked up this morning as we've gone across the booths", he told AAP.

Xenophon resigned from the federal parliament previous year to contest the South Australian election after he was caught up in the citizenship scandal (but was ultimately cleared by the High Court).

Outgoing Labor premier Jay Weatherill had announced a plan in February to create a network of 50,000 home solar systems backed by Tesla Powerwall batteries.

Others in the mix are former transport minister Stephen Mullighan and possibly former education minister Susan Close.

"They have spoken in favour of our policies, which support affordable and reliable energy, which will ensure we can meet our Paris commitments and at the same time ensure we can keep the lights on and indeed afford to keep the lights on".

Liberal leader Mr Marshall said the people of South Australia had "put their trust, their faith in me and the Liberal team" for "a new dawn for South Australia".

"And I wished him all the best on his endeavours to really take that role and make it his own role".

This weekend's results may also be a sign that the minor parties are losing their appeal having made a big impression on the 2016 federal election. "I won't be one of them but. we'll have a good solid new team to take forward", Mr Weatherill said.

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Mr Marshall had ruled out governing with SA-Best, which was aiming to hold the balance of power in the lower house.

"It's been way too long between drinks for the Liberal Party in South Australia", he said.

Mr Marshall said job creation would be a focus of his government and also pledged to lower taxes and the cost of living.

Overall, voting across SA achieved a swing to Labor, but a redrawing of electoral boundaries delivered four more seats to the Liberals than in 2014.

"This is, this is not the beginning of the end, it's actually the end of the beginning".

Xenophon's SA Best was considered a wildcard factor in the election, but by 9.30pm on Saturday evening, the ABC's election analyst Antony Green said the contest had settled into a two-horse race between Labor and the Liberals.

"I've enjoyed it and I've enjoyed speaking to as many people as I have", he said.

SA-Best was projected to win about 13.7 per cent of the vote across the state, according the ABC, compared with 33 per cent for Labor and 37 per cent for the Liberals.

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