ELECTRIC POWER SUPPLY SYSTEM FOR VEHICLE

A power supply system can include an electrical power source and a power converter connectable to a load. The electrical power source can provide a first DC voltage with a first potential difference (V) between a first DC potential output and a second DC potential output, and a third DC potential output having a potential between the potential at the first DC potential output and the potential at the second DC potential output. The power converter can provide a second voltage with a second potential difference (V) between a first potential output (V+) and a second potential output (V-). The second potential difference (V) can be less than the first potential difference (V). The power converter can electrically isolate the first DC voltage from the second voltage, and the second potential output (V-) can be connected to the third DC potential output using a first connection including an impedance.