Power supply control apparatus

A power supply control apparatus, comprising:

• a voltage detection unit that detects an output voltage of a battery or an alternator provided to a vehicle;
• a condition acquisition unit that acquires a condition of an engine provided to the vehicle;
• a voltage transformation unit that raises or lowers the output voltage;
• a switching unit that switches power supply to each of a plurality of in-vehicle devices provided to the vehicle to either of the output voltage and a voltage transformed by the voltage transformation unit;
• and
• a control unit that outputs an instruction to switch the switching unit based on the output voltage value detected by the voltage detection unit and the condition of the engine acquired by the condition acquisition unit,
• wherein the switching unit switches a destination of power supply between a first in-vehicle device group to which a voltage higher than V1 is to be supplied and a second in-vehicle device group other than the first in-vehicle device group, and
• the control unit outputs an instruction to lower the voltage or an instruction to raise the voltage to the voltage transformation unit, and outputs an instruction to switch between the first in-vehicle device group and the second in-vehicle device group to the switching unit.