LENGTHY power outages darkened celebrations over the Easter long weekend, with customers taking to social media to vent their outrage.

Facebook lit up on Sunday evening as debate raged over whether the outages could be avoided.

With so much time and money being invested in the refurbishment and upgrade of the East Warwick power sub-station residents want to know why the region is still dealing with regular blackouts.

Ergon Energy Corporate Communications manager Rod Rehbein explained that the energy system works with energy cascading to Warwick from Toowoomba, then to the localised substations, then to transformer boxes and from there to houses and businesses.

"Upgrades to the East Warwick sub-station will not be of any use if the fault is not is an area feeding off that sub-station," Mr Rehbein said.

"There were two power supply interruptions in the Stanthorpe region on Sunday afternoon, both due to lightning strikes on the network during the storm and also one in Warwick on Sunday night caused by a bat.

A high voltage line fell in Canning St after being struck by the bat interrupting power to around 1350 customers at 7.32pm.

"Power was fully restored about 9.45pm after crews had complete the repairs."

Southern Downs event organiser Ian Wade-Parker of Slydogz said Sunday's power outage had left him shattered after being forced to cancel the Rockin' The Vines concert in Ballandean.

"We lost power just after the first band finished and were without power for two hours before we decided to pull the plug," Mr Wade-Parker said.

"The punters were all disappointed to miss out on a great afternoon of live music, the local bands lost the opportunity to play to a crowd with a professional sound system and we have taken a massive hit as a business.

"We've given refunds to everyone who came, we're left with all of the food and drinks we bought for the event, the equipment we've hired to put on a big rock show, and of course we've already paid the sound guys and the main act but didn't even get to see them do their thing.

"I understand these things happen, but in this day and age, with all of the money we pay for our electricity, outages need to be rectified quickly, not four hours later.

"The storm was mild at best, it says something about the infrastructure in the region if that's all it takes to cause a major blackout and inconvenience businesses and homes on one of the busiest weekends of the year."