MV Hallaig was launched from Ferguson Brothers, Port Glasgow in 2012 for Calmac.
She was reputedly the first diesel hybrid vessel to be launched and operation World Wide.
She operated successfully for 9 years up until September last year.
In September last year suffered a catastrophic failure in which the crew and passengers were evacuated from the ferry.
Sincetember she has been running on diesel power.
Her replacement batteries will not be available until early 2025, and will cost £1.5m.
So much for green power.
Vic