Victorians could be slapped with electricity price hikes of more than 30 per cent under a proposal put forward by the state's economic regulator.
The Essential Services Commission on Wednesday released a draft decision proposing a rise in the state's default offer of more than $400 a year for residential customers.
It said the typical bill would go from $1403 to $1829 annually, while small businesses would face increases of more than $1700 on an average bill.
The proposed increases were primarily due to significant rises in wholesale electricity costs, which have been driven by higher commodity prices.
The commission is due to release its final decision in late May and the changes will come into effect in July.
More than 450,000 customers across the state are on the default offer, which sets a ceiling for the prices users can be charged.
It also represents the maximum amount customers in "embedded networks" - such as apartment buildings and shopping centres - can be charged.
The vast majority of electricity customers are on discounted retail offers.
Victorian minister Natalie Hutchins acknowledged families were facing financial pressures and pointed to the next round of the $250 power-saving bonus on March 24 as a means to ease the burden.
The government was doing its best to mitigate soaring living costs through other measures like free kinder and TAFE, and capped V/Line fares, she said.
However, Ms Hutchins would not be drawn on whether there was scope for the government to increase the power-saving bonus to make up for the predicted increase.
"The really important commitment that our government's made is the investment in the (State Electricity Commission) and we'll continue to step up that policy and roll that out," she said.
Victorians on the default offer will pay less on average for their electricity than people on default offers in NSW, southeast Queensland and South Australia.
But Opposition Leader John Pesutto condemned the price rises, saying the Labor government had clearly failed Victorians.
"This shows the government has no plan to reduce power prices, no plan to transition to renewables and no plan to guarantee Victoria's future energy supply," he said.
Opposition energy spokesman David Hodgett called on the government to explain how the SEC would reduce energy prices and guarantee the state's future energy supplies.
The Andrews government has flagged roping in the Commonwealth to help fund the re-booted commission.
The state Department of Energy, Environment and Climate Action was in January seeking investment advisers for the revived commission.
The advice would help it leverage investment in renewable projects by partnering with suitable co-investors, developers and financiers, a tender document said.
They could include private investors, superannuation funds and the federal government.
The electricity commission is pushing to finalise a renewables project investment in Victoria this year.
Labor has pledged an initial investment of $1 billion to deliver 4.5 gigawatts of power through renewables, creating 59,000 jobs and at least 6000 apprenticeships and traineeships.
