A bus bar system, including: a first bus conductor assembly comprising a plurality of first conductor components; and a second bus conductor assembly comprising a plurality of second conductor components; wherein each of the first conductor components comprises a first upper port, a first lower port and a first middle part connected between the first upper port and the first lower port, and the first upper port, the first lower port and the first middle part are in the same plane, each of the second conductor components comprises a second upper port, a second lower port and a second middle part connected between the second upper port and the second lower port, and the second upper port and the second lower port is in the same plane, each first lower port and the corresponding second lower port overlap and each first upper port and the corresponding second upper port are separate, so as to form a plurality of bus bars side-by-side, and the plurality of the first upper ports and the plurality of the second upper ports are arranged in sequence and the overlapped first and second lower ports (1-3, 2-3) are arranged in sequence, characterized in that each of the first conductor component has a substantial S-shape, each of the second conductor component has a substantial S-shape, the plurality of the bus bars are V-shape bus bars, the second middle part is arc-shaped or arched and is not in the same plane as the plane where the second upper port and the second lower port are located, so that electrical clearance is formed between the first bus conductor assembly and the second bus conductor assembly, and the bus bar system further comprises an upper plastic shell and a lower plastic shell, and the first and second bus conductor assemblies (1, 2) are sandwiched and fixed between the upper plastic shell and the lower plastic shell. a first bus conductor assembly comprising a plurality of first conductor components; and a second bus conductor assembly comprising a plurality of second conductor components; wherein each of the first conductor components comprises a first upper port, a first lower port and a first middle part connected between the first upper port and the first lower port, and the first upper port, the first lower port and the first middle part are in the same plane, each of the second conductor components comprises a second upper port, a second lower port and a second middle part connected between the second upper port and the second lower port, and the second upper port and the second lower port is in the same plane, each first lower port and the corresponding second lower port overlap and each first upper port and the corresponding second upper port are separate, so as to form a plurality of bus bars side-by-side, and the plurality of the first upper ports and the plurality of the second upper ports are arranged in sequence and the overlapped first and second lower ports (1-3, 2-3) are arranged in sequence, characterized in that each of the first conductor component has a substantial S-shape, each of the second conductor component has a substantial S-shape, the plurality of the bus bars are V-shape bus bars, the second middle part is arc-shaped or arched and is not in the same plane as the plane where the second upper port and the second lower port are located, so that electrical clearance is formed between the first bus conductor assembly and the second bus conductor assembly, and the bus bar system further comprises an upper plastic shell and a lower plastic shell, and the first and second bus conductor assemblies (1, 2) are sandwiched and fixed between the upper plastic shell and the lower plastic shell.