3 ms·

Because then you have an empty bus while it charges.

• mulmen 10y ago
  I guess it depends on how hard it is to swap out a battery but on a vehicle like a bus that can probably be made very simple. Now that I think about it a bus must carry a large quantity of fuel, I wonder how long it takes to fill one up. Swapping a battery could actually be faster.
  • tly 10y ago
    Depends on battery charging rates but in general, a swap will be faster at large energy densities. BAIC in China are currently experimenting with this in taxis and buses.
    • mulmen 10y ago
      Sure but even with low charging rates you can make up the difference with more battery packs right?