our design the the electric BUS, the entire bus battery pack shown on the right by the five standard quick-change buses and four small boxes large boxes in series, each large box of 1 and 24 string 300AH battery composed by a small box 1 and 12 string 300AH battery. Large box nominal voltage 76.8V, small boxes nominal voltage 38.4V. The total series voltage 537.6V, the overall total energy 161. 2kwh