This story was first published on 6 May when Rannou was announced as CEO. It was updated on 13 December when Senvion confirmed his start date.
The German company had announced Rannou as its new CEO in September, after Juergen Geissinger quit the manufacturer in May.
Rannou was most recently chief executive of GE Renewable Energy's hydro division, following the US conglomerate's takeover of the power and grid business of Alstom.
He also held the role as senior vice president of Alstom's wind unit between January 2014 and October 2015.
Rannou has also managed Alstom's hydro business in China.
Geissinger had quit the manufacturer in May 2018 expressing the desire for new challenges following the completion of the company’s restructuring, global expansion, and successful initial public offering (IPO).
Senvion had been led by CFO Manav Sharma while a recruitment process took place, supported by CSO David Hardy. They will continue to lead the company, until Rannou joins.
The manufacturer's chairman, Steven Holliday, said: "We are delighted that Yves is able to join us in January. He will finalize the overall strategic approach and will be leading the implementation of all operational decisions right from the beginning of the new year."
Rannou joins Senvion after it reported a 38.2% dip in revenue in the first nine months of 2018.
As well as focussing on the deployment of the company's new 4.2MW model, he will also over see the development of a 10-12MW offshore machine, which is part of a pan-European development programme.
"I am very much looking forward to start at Senvion. The company provides a perfect basis to continue its global growth. As for all industry players the next years are crucial and though they offer challenges, they also offer great opportunities" Rannou said of his new role.
"I am glad to become part of the Senvion team and together with the senior leadership team ensure that the company is making the transitions needed to remain an industry leader in an innovative and very future relevant industry."