“XZERES recently installed a 10kW ClassNK certified wind turbine system at a composite fabrication plant in Kami-Amakusa, Kumamoto, Japan. The installation marks the company’s first system deployed in the country, which in this particular location is expected to generate an internal rate of return of 14%.”
http://finance.yahoo.com/news/xzeres-10kw-small-wind-turbine-123100102.html