Assume an average delivery truck driver's job is 10 hours a day. Assuming no time for unloading, that would be 50 miles an hour at the 500 mile range.
50 miles an hour is probably high for the average speed of an in-town deliver truck. And even if all it is doing is dropping off trailers and picking up new ones, that would be adequate for quite a bit.
And if the truck is stopping and the driver is unloading pallets, etc, then 500 miles is way more than enough; 300 comes into play.
You just assumed a brand new battery, fully charged, and then taken to empty in optimal conditions.
Nobody would actually use a truck like that day to day, you need slack for every thing from aging batteries to making it to charging infrastructure and running the AC.
50 miles an hour is probably high for the average speed of an in-town deliver truck. And even if all it is doing is dropping off trailers and picking up new ones, that would be adequate for quite a bit.
And if the truck is stopping and the driver is unloading pallets, etc, then 500 miles is way more than enough; 300 comes into play.