The Liberals moved to block Labor's proposed state bank tax in the Upper House with the support of crossbenchers and stopped a city auto parking levy, contravening a longstanding convention of rubberstamping money Bills. "I have zero ambitions to go into federal parliament".
He is not expected to win Hartley, the seat he was contesting at the election.
They are also favoured to pick up at least one of the two seats still in doubt. He has also ruled out an immediate return to federal politics and said he would not take a job as a paid staffer. "I do feel like one of those horses who has won four Melbourne Cups and I think the handicap has caught up to us on this occasion". "What I have planned is to get eight hours sleep".
Liberal leader Steven Marshall claimed victory for his party on Saturday night after his party was projected to win the 24 seats in the lower house of parliament required to form government.
He told reporters in Adelaide he was looking forward to implementing the Liberals' plans for the state.
Mr Koutsantonis said when the Opposition Leader makes decisions overturning precedent, as Mr Marshall did in blocking the state's bank tax, there must be "consequences for it".
The quietly spoken but combative Mr Weatherill led South Australia for six years, frequently clashing with the Turnbull government over issues such as energy policy as he sought to transform the state into a renewable energy powerhouse.
Marshall said South Australians could expect a cut to their emergency services levy bill from 1 July but would not say which of his policies would be implemented first.
Jay Weatherill's government faced several troubles in the past term, including the 2016 power blackout.
While over the long term there has been a bleeding of support towards minor parties and protest movements, the abject failure of Nick Xenophon's SA Best movement, which aimed to secure the balance of power in South Australia but ended up winning not a single seat, shows there are no guarantees for parties of populism or protest in the Australian political system.
"That's something I " ll need to think about, what I do with that, in the coming days", he said.
Speaking from Sydney, Prime Minister Malcolm Turnbull, leader of the Federal Liberal Party, said the result was an endorsement of his government's national energy policy.
South Australia, the country's fifth most populous state, has the most wind and solar power but the highest electricity prices in the country.