Shaking wind turbines may cost Siemens Energy billions of euro

After expressing confidence in January that it had uncovered all of Gamesa’s technical problems, Siemens Energy finds itself once again opening the book on the unit’s shortcomings.

Siemens Energy has said that 15% to 30% of turbines were affected by the flaw whereby a main piece on the frame of its wind turbine can move or twist over time, potentially damaging other critical components.

Wind turbines make money when they spin. But when they shake, it can cost billions of euro. 

Siemens Energy is now struggling to contain the fall-out after discovering a main piece on the frame of its wind turbine can move or twist over time, potentially damaging other critical components, according to people familiar with the matter.