Traditional power distribution box structure Tesla Model 3 power distribution box structure The difference between the traditional power distribution box to achieve dual power supply and Tesla is as follows: for a single open circuit fault, the two are basically equivalent, and the failure of any power supply will not affect the power supply . For single-circuit short-circuit fault: ① The traditional design is a dual power supply input distribution box in parallel, and the power input is only one terminal, and a short circuit may cause the power supply to fail; while Tesla has two power terminals, which is significantly more reliable.