Less than two decades ago, SA generated all its electricity from fossil fuels. Last year, renewables provided a whopping 60%of the states electricity supply. The remarkable progress came as national climate policy was gripped by paralysis so how did it happen?

Ourresearchset out to answer this question. We analysed policy documents and interviewed major actors in South Australias energy transition, to determine why it worked when so many others fail.

We found governments need enough political power to push through changes despite opposition from established fossil fuel interests. They must also watch the energy market closely to prevent and respond to major disruptions, such as a coal plant closing, and help displaced workers and their towns deal with the change.

South Australia shows how good public policy can enable dramatic emissions reduction, even in a privately owned electricity system. This provides important lessons for other governments in Australia and across the world.

Why is the energy transition so hard?

In decades past, fossil-fuel-dominated energy markets revolved around a few big, powerful players such as electricity generators and retailers. Overhauling such a systeminevitably disruptsthese incumbents and redistributes benefits, such as commercial returns, to newer entrants.

This can create powerful - and often vocal losers, and lead to political problems for governments. The changes can also cause hardship for communities, which can be rallied to derail the transition.

The change is even harder in a privatised energy market, such as South Australias, where electricity generators and other players must stay profitable to survive. In the renewables shift, fossil fuel businesses can quickly become commercially unviable and close. This risks supply shortages, as well asprice increaseslike those after Victorias Hazelwood coal plantclosedin 2017.

The obstacles help explain why a wealthy nation such as Australia, with extremely high per capita emissions and cheap, plentiful renewable resources, has struggled to embrace its clean energy potential. Even frontrunners in environmental policy, such asGermany, have struggled to make the switch.

How South Australia did it

South Australia is a dry state extremely vulnerable to climate change with abundant wind and solar resources. These factors gave it the motivation and means to transition to renewables.

The South Australian Labor government, elected in 2002, adopteda targetfor 26% renewables generation by 2020. At the time, wind energy was already a competitive supplier of new generation capacity in Europe, creating an established wind farm industry looking to invest.

Some of South Australias best onshore wind potential was located near transmission lines running 300 kilometres from Port Augusta to Adelaide. This greatly reduced the cost of connecting new wind generators to the grid.

South Australia benefited greatly from the federalrenewable energy target, established by the Howard government in 2001 and expanded under the Rudd government.

The scheme meant the South Australian government didnt need to offer its own incentives to meet its renewables target it just had to be more attractive to private investors than other states. This was a relatively easy task. Under the state Labor government, South Australias energy and environment policy was consistent and coordinated, in contrast to the weak and inconsistent policies federally, and in other states.

To attract renewable energy investors, the governmentmade lawsto help construct wind farms in rural zones away from towns and homes. New wind farms were regularly underwritten by state governmentsupply contracts.

As the transition progressed, the states largest coal generator, at Port Augusta, was wound back and eventually closed. To help workers and the town adjust, the state government supported employment alternatives, including aA$6 milliongrant towards a solar-poweredgreenhouseemploying 220 people.

The Labor government enjoyed a long incumbency, and the state was not heavily reliant on the export of fossil fuels. This helped give it thepolitical leverageto push through change in the face of opposition from vested interests.

Its not easy being green

South Australias transition was not without controversy. Between 2014 and 2018, the states consumer electricity pricesrose sharply. While criticssought to blamethe increasing renewables share, it was largely due to other factors. These include South Australias continued reliance onexpensive gas-fired powerand theclosure of the Hazelwoodcoal-fired power station in neighbouring Victoria, which fed large amounts of power into South Australia.

And in late 2016, South Australia suffered a statewide blackout. Again, renewables wereblamed, when the disaster was in factdue tostorm damage andoverly sensitivetrip switches.

After a second, smaller blackout six months later, the then federal treasurer Scott Morrison brought a lump of coal into parliament andarguedSouth Australias renewables transition was:

switching off jobs, switching off lights and switching off air conditioners and forcing Australian families to boil in the dark as a result of their Dark Ages policies.

In 2018, Labor lost office to a Liberal partyhighly criticalof the renewables transition in opposition. But by then, the transition was well advanced. In our view, specific legislation would have been required to halt it.

The state Liberal government has nowfirmly embracedthe renewables transition, setting a target for 100% renewable electricity by 2030. By 2050, the government says, renewables could generate 500% of the states energy needs, with the surplus exported nationally and internationally.

Leading the world

The South Australia experience shows a successful renewables transition requires that governments:

• have enough political power to advance policies that disadvantage energy incumbents
• monitor the energy market and respond proactively to disruptions
• limit damage to displaced workers, businesses, consumers and communities.

It also highlights the importance of having transmission infrastructure near renewable resources before new generators are built.

As energy markets the world over grapple with making the clean energy transition, South Australia proves it can be done.

This article, republished from The Conversation, was written by: Michael McGreevy, Research Associate, Flinders University Fran Baum, Matthew Flinders Distinguished Professor, Foundation Director, Southgate Institute for Health, Society & Equity, Flinders University