The Tasmanian Fire Service said an electrical fault was to blame for a fire which occurred overnight at a factory in the state's South.
TFS were alerted to the fire at Nystar's Lutana site just before 12:30 am.
Acting District Officer Barry Bones said the blaze took about an hour to put out.
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"When they arrived, they located fire in the roof and wall space of the high voltage cell room, where the power has been turned off to allow for firefighting in the area," he said.
"It took five crews, totalling 20 firefighters, about an hour to bring the fire under control and they remained on scene overnight to ensure any flare ups were quickly controlled."
It is still unknown how much damage the fire caused.
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