The Type 45 is fitted with an advanced and innovative integrated electric propulsion system.Integrated electric propulsion seeks to supply all propulsion and ship's electrical load using alternating current at a high quality of voltage and frequency. This is achieved by computerised control, high quality transformation, and electrical filtering. Two Rolls-Royce WR-21 gas turbines drive GE alternators and along with two Wärtsilä 12V200 diesel generators provide electrical power at 4,160 volts to a GE high voltage system. The high voltage supply is then used to provide power to two GE Power Conversion advanced induction motors with outputs of each. Ship's services, including hotel load and weapons system power supplies, are supplied via transformers from the high voltage supply at 440 V and 115 V. The benefits of integrated electric propulsion are cited as: