If their vehicles need to charge more often than just overnight, then they need to consider whether they are buying the right vehicles for the job.
The examples I mentioned are from London, which has a growing fleet of hundreds of heavy electric vehicles (city buses, UPS trucks, etc). All of these charge exclusively overnight.
Why move a heavier battery pack around if you can have a charging station at both ends of your route? Certainly lower weight means lower cost battery packs and overall higher efficiency since you're not dragging around spare energy for most of your day.
The examples I mentioned are from London, which has a growing fleet of hundreds of heavy electric vehicles (city buses, UPS trucks, etc). All of these charge exclusively overnight.