https://www.avrt.net/marathon-avr/marathon-digital-avr-dvr2000e
Item: MARATHON AVR DVR2000E for alternator
Sensing Input
Voltage: 90-600V AC
Frequency: 25-420 Hz nominal
Power input
Voltage: 180-240V AC 250-300HZ
Output
Voltage: 75V DC
Current: Continuous 3A dc intermittent 7.5A for 10 secs.
Regulation: +/-1%