Sounds like a bad idea unless the power input can handle 2 different voltages into the same place (at once?).
If it can handle both at once, you could still damage the car by feeding 24v into a 12v output port. It might blow a fuse, or burn up a circuit, or do nothing.
But it might be possible to install a diode or diodes in the line to prevent power flowing back into the car. Diodes are like one-way gates for electricity, but it would need to be the right kind and rated for the volts/amps going through it
Sounds like a bad idea unless the power input can handle 2 different voltages into the same place (at once?).
If it can handle both at once, you could still damage the car by feeding 24v into a 12v output port. It might blow a fuse, or burn up a circuit, or do nothing.
But it might be possible to install a diode or diodes in the line to prevent power flowing back into the car. Diodes are like one-way gates for electricity, but it would need to be the right kind and rated for the volts/amps going through it