One of an 800-volt system’s greatest benefits is that it requires half the amperage of a 400-volt system to return the same charging speed, as multiplying voltage by amperage provides the charging speed. Higher charging rates incur more losses, so by lowering the current and raising the voltage, the whole process becomes more energy efficient.

Another win for the 800-volt system is that, due to the lower amperage current within the EV, thinner cables can be used.