Two Glenorchy residents will be sent the bills - one expected to be for "thousands" of dollars - for repairs to power lines cut by felled trees over Easter.
Delta system control manager Graeme Johnson, of Cromwell, said one resident was felling a tree at 10.30am on Friday when a power line was cut.
Delta contractors were called to Glenorchy and power was restored to the town at 2pm.
The town has a resident population of about 460.
However, Paradise and Kinloch residents were faced with a "groundhog day" scenario on Saturday, when the power went out again at 2pm.
Mr Johnson said another person was felling another tree when it came down and damaged eight power poles.
Four contractors called to the site worked for 10 hours - including through a storm - to restore power at 11pm.
"They were working in that weather.
"When we get storm conditions coming through, then we need the guys out repairing storm damage ... not inadvertent damage [which wouldn't happen if] people took a bit of care, or got professionals to do [the job]."
Mr Johnson was unsure why neither of the tree-fellers saw the power lines before they started cutting.
"It happens all the time ... it's not unusual - I'd say at this time of year it could be once a month.
"They just don't know what they're doing - they don't take notice of [power lines].
"These [expert] guys that go in and do the cutting of trees close to the lines, they generally know what they're doing.
"We'll take the lines down while we take a tree down if we have to."
Mr Johnson said the cost of repairs for the two incidents had not been determined yet, but the bill for Saturday's outage would be in the thousands.
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