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Civil Defence will carry out a "post-mortem" of the response to last week's storm, including the work of lines company Vector in restoring power to customers.
The exercise would be carried out in the next two weeks.
"I don't think it's acceptable somebody's without power for six or seven days but unfortunately this particular event was so widespread and so severe, it really did stretch the maintenance capacity. I know Vector brought people up from Wellington and all over the place," said Civil Defence Auckland region controller Harry O'Rourke.
"It's certainly means it's a thing we have to look at for the future so that perhaps we may be better prepared next time."
Mr O'Rourke said there had been no suggestion the Vector network "was anything but top notch".
"Some of those rural ones are so way out that slips and all those things can affect poles. You can't really underground something that goes 5km to one farm house."
Electricity and Gas Complaints commissioner Judi Jones said she had received some complaints about the outage but had referred customers back to their power companies.
Complaints must go through a company's in-house process before she can investigate.
Just under 5 per cent of the 6813 complaints to the commission between October 2001 and March this year related to electricity supply, and 1.2 per cent about lines. The majority of complaints, 37 per cent, were about billing.
Ms Jones said she could not comment on the time taken to reinstate power supplies to customers following the storm.
"Customers can expect to have their supply of electricity interrupted when there's an unusual weather event, particularly when supply comes by lines and poles as opposed to underground," she said.
"I also think customers can expect their lines company will use reasonable care and skill in delivering the service, and retailers to deliver electricity to a reasonable standard."
Whether that had been the case following the storms would depend on an assessment of individual complaints, she said.
