A green campaigning group says a proposed windfarm in Colby would have paid for itself if it had been built two years ago.
Sustain: Isle of Man took to Facebook after examining Manx Utilities accounts for the past two years.
It says the Earystane site would already have saved £40 million in fuel costs to provide a third of the Island's energy.
And it claims Manx Utilities would be £10 million richer.
The energy provider identified Earystane as a windfarm site last year.
What's being done to tackle crash blackspots?
New TT schedule will be reviewed on yearly basis
No successful driving theory test appeals in past 10 years
Steam Packet announces tomorrow morning's sailings will go on time
Firefighter to raise money by wearing full gear in fitness competition
Visa fraudster convicted in Isle of Man immigration scam
Crowds gather for Maccies re-opening after £1.6m upgrade