The problem is that the hills in Seattle are quite large, so you are going up for a long period of time and possibly not able to regenerate before you run out of batteries.
The other problem is that because battery weight is so large, that in itself becomes a limiting factor for hilly operation where it is not really relevant for trolleybuses. And trolleybuses can feed current from uphill buses to downhill buses through the wires, but there's no such connection on battery buses.
> The problem is that the hills in Seattle are quite large, so you are going up for a long period of time and possibly not able to regenerate before you run out of batteries.
Is this deadpan sarcasm? Seattle isn't a mountain pass. The biggest hills are a couple hundred feet bottom to top. The "High Point" neighborhood, which is, uh, the highest point above sea level, is at 522 feet. Every other hill is smaller than that.
Total ascent time is measured in double-digit seconds, discounting lights/stop signs.
The other problem is that because battery weight is so large, that in itself becomes a limiting factor for hilly operation where it is not really relevant for trolleybuses. And trolleybuses can feed current from uphill buses to downhill buses through the wires, but there's no such connection on battery buses.