Williams will start the season with KERS on its cars, having resolved the problems it suffered in testing this week.
The team has had to run without KERS since Wednesday, when an emergency cool-down procedure was required following what technical director Sam Michael described to AUTOSPORT as "an electrical problem – not with the battery or the MGU [motor generator unit], but the equipment that goes between the two."
Michael had admitted that he could not be confident of having KERS for Melbourne until the issue had been investigated, but the team has now announced that the problem has been identified and resolved.
A Twitter post from Williams said Michael had: "Reviewed KERS problem and good news is that we'll be racing KERS in Melbourne."
Although Williams has lost testing mileage to KERS issues on several days in the winter, Rubens Barrichello said earlier this week that he felt its problems were no worse than other teams.
"KERS seems to be zero problems one day and another day a hundred problems, and then you don't know where it is," said the Brazilian. "From what you read, I think people do have that sort of problem."