DC-DC converter, can change a range is from 5-40V DC to a lower input Voltage for 11 of the 12 positons. Each position with the Voltage as below:
12(the highest position)
HV(the highest Voltage)
Remarks: in 12position, the output voltage is the maximum voltgae of the input converter. It's recommended only for the generator to charge 12V or 24V Lead-acid batteries that can be improved efficiency by 30-50% after.