Workers at the Galloway Hydro Scheme have voted to go on strike.
Members of the Unite union at Glenlee power station have voted to take action in a dispute over pay with Drax Hydro.
More than 80 per cent of members voted for action.
The ballot came after staff rejected an eight per cent pay offer, with Unison highlighting that Drax Hydro posted profits of £2.3 million in 2021.
And it believes the strike action could result in power cuts.
Unite general secretary, Sharon Graham, said: “Drax Hydro is a profitable energy company and it can afford to pay its workforce significantly more than the current offer. This is a classic case of corporate greed and now the UK faces a threat of power cuts due to Drax’s greed.”
“We are deeply disappointed that Unite is planning to go forward with this unnecessary action.”