Senvion S.A. (called REpower Systems SE until 2014) was a German wind turbine manufacturer founded in 2001 in Germany, majority owned by a private equity firm.

Senvion as REpower Systems, as it was initially called, was established in 2001 through the merger of German wind companies: HSW (Husumer Schiffswerft), the engineering consultancy Pro+Pro (a subsidery of Denker&Wulf and aerodyn Energiesysteme GmbH), the wind turbine manufacturer BWU and Jacobs Energie; and since April 2015 Centerbridge Partners.

With equipment pricing under pressure due to auctions, Senvion filed for insolvency in German courts in early April 2019.

[9] Senvion sold its 9 GW European service fleet to Siemens Gamesa in October 2019.

[10] A Saudi Arabian company, Alfanar, acquired the Indian division of Senvion in 2021.