The Australian electricity market on Sunday reached a milestone, with solar power outstripping energy generation from coal for the first time since the market was set up two decades ago.
The crossover point lasted for only a few minutes, as low demand and sunny skies meant the contribution from coal dropped to a record low of 9,315 megawatts (MW) just after noon, while solar provided the dominant share with 9,427MW.
Dylan McConnell, a research fellow at the University of Melbourne’s climate and energy college, said that for a brief moment solar represented 57 percent of national electricity generation.
Photo: EPA-EFE
“This is what I unofficially call ‘record season,’” McConnell said. “It’s actually still pretty early in the season [to get these numbers], but in spring or the shoulder seasons you have the combination of low demand, because there’s no heating or cooling, and then nice weather on the weekend.”
“Those factors combine, and you get these giant shares of renewable energy that generally push out coal,” he added.
While McConnell said it was only “fleeting” and that “Australia was a long way from peak renewable energy,” energy prices also went negative on Sunday from 8:30am to 5pm.
Although the exact price differed by jurisdiction, it means producers were being paid to consume, or energy producers were paying to keep running.
Unlike more nimble solar and wind producers, coal generators are particularly hurt when prices turn negative. The costs associated with shutting down and restarting coal generators are prohibitive, meaning operators would choose to keep running even at a loss.
According to data Web site NEMlog, South Australia had 100 percent of its energy needs met by wind and solar, while Victoria would have met 102 percent of state demand had operators not been forced to switch off during the period of negative prices.
Energy analyst Simon Holmes a Court said the overall proportion of renewable energy — solar, wind and hydro — would have been higher in the energy mix, but wind producers chose to shut down to avoid the price hit.
“There was a significant amount of curtailment,” he said. “What it shows is that there’s already more renewables that could have gone into the grid if the coal plants were more flexible and transmission was upgraded.”
The development coincides with calls from Clean Energy Investor Group (CEIG) — an 18-member body that advocates for investors in large-scale renewable energy projects — for financial reforms to “align Australia with international markets” and “unlock” new investment.
Modelling conducted for the group by Rennie Partners found that Australia needs 51 gigawatts (GW) of renewable energy generation by 2042 if it is to meet its commitments under the Paris Agreement, but that only 3GW of new wind and solar projects have been committed, leaving a 48GW shortfall.
CEIG chief executive Simon Corbell said that governments and regulators should bring Australia’s investment guidelines into line with global markets.
“Clean energy investors currently face significant risks in the NEM, which is holding back the capital needed,” Corbell said. “To unlock an investment pipeline worth A$70 billion [US$50.17 billion], we need effective market reforms and policy certainty, which could also save up to A$7 billion in capital costs, or up to 10 percent of the cost of Australia’s clean energy transition.”
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