Siemens Gamesa receives a new order for 43 SG 4.5-145 turbines to be installed in Canada Order includes 43 SG 4.5-145 turbines with flexible rating up to 4.8 MW Once installed, these will be the most powerful turbines with the largest rotor installed in the country (WK-intern) - Siemens Gamesa Renewable Energy has announced that it has signed a contract to supply and commission 43 SG 4.5-145 wind turbines, with flexible rating up to 4.8 MW, for a wind project in Canada with an undisclosed customer. The order is for a nominal capacity of 194 MW. The SG 4.5-145 will be the most powerful