This method reduced the evening peak usage to only 6 per cent, or an 80 per cent decrease from the baseline.
Despite the incentives leading to significant behavioural change, EV drivers still charged in the evening peak between 6 and 10 per cent of the time.
“If that 6 per cent is all located in one network patch, then that will have a magnified impact on that local substation or the local connection,” Mrs Le said.
Mrs Le said the third part of the trial, which is ongoing, would see Origin work with power distributors (Citipower, Powercor and United Energy) to understand if the grid would need to be upgraded to meet the baseline usage seen in the trials, once mass adoption of EVs takes place.
ARENA chief executive Darren Miller said they funded $840,000 of the $2.9 million of the trial, adding that three others with retailers and distributors were also running across the country.
Mr Miller said the power grid wouldn’t cope if everyone charged their EVs in evening peak.(Supplied)
Mr Miller said ARENA, an independent federal government agency, was investing in the research because they were “very concerned” about what might happen when EVs became more popular.
“Extra investment will have to be made and that will cost all of us on our electricity bill too ultimately.
“I think if we do this really well, we could expect there to be not much extra costs involved from the distribution companies.
“We can make sure we don’t have to invest an extraordinary amount in the distribution system, the poles and wires outside our homes and businesses, to accommodate that extra load.”
The trial will examine if there needs to be any upgrades to the power network, with the Gladstone power station seen here.(ABC News: Christoper Gillette )