... 24V, optional 12V15) Accessory: S. A. E. 3 flywheel housing, radiator (with fan guard and front guard), 10", 111/2 ... wires alternating current output 9) Frequency: <3% ,10) Frequency at stable state: <0.5% ,11) Frequency deviation at instantaneous state: ≤+ ... 10% 12) Frequency return time: ≤3s 13) Voltage deviation at stable state: ≤+ -1% ,14) Voltage deviation at instantaneous state: ≤+20% ...