I don't mean delivery vans as substitute for semis, I mean choosing to use the batteries where they will be most effective for emissions reductions. I don't think hauling bags of chips around is all that good a use of limited battery resources. Delivery vans with their low speed and stop-start usage are probably getting some of the most drastic reductions, since that's when ICE's are at their worst. Plus with the shorter distances and lots of regenerative braking, you can get away with smaller batteries.
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