Delivery Windows + EV Charging Stops: A Practical Scheduling Model

The Scheduling Problem Nobody Flags Until It's Too Late

Small delivery fleets moving to electric vans rarely fail because the vehicles can't do the mileage. They fail because the schedule was built for a diesel van that never needed to stop for anything but fuel and lunch. An EV route needs at least one deliberate pause for opportunity charging, and if that pause isn't planned into the delivery windows from the start, it gets squeezed out — leaving drivers arriving at the depot with 9% state of charge and a dispatcher scrambling for tomorrow's plan.

The fix isn't more charging infrastructure or a bigger battery. It's treating the charging stop as a scheduling primitive, the same way a lunch break or a loading dock slot is treated — something with a fixed duration, a location, and a window, built into the route before customer appointments are confirmed.

Treating Charge Windows Like Delivery Windows

Most route planning tools already handle time windows for customers: "deliver between 10:00 and 12:00." The same logic can govern charging. A 20–30 minute opportunity charge at a midday hub, a retail charger near a delivery cluster, or even a slow top-up during a driver's break should be entered as a constraint with its own window, not treated as slack time that gets absorbed whenever the day runs late.

In practice this means:

- Identifying one or two charge-compatible locations per route that sit naturally along the existing stop sequence, rather than detouring to a charger that adds unproductive kilometers.

- Setting the charge window early — ideally pinned to a stop that already has dwell time, such as a depot cross-dock or a long unloading appointment — so the charging minutes overlap with time the vehicle would be stationary anyway.

- Giving the charge stop a hard minimum duration in the planning tool, the same way a customer's loading dock slot is locked. If it's optional, it will be the first thing cut when a delivery runs late.

This also interacts with milieuzone planning for fleets running mixed routes through low-emission zones: a charging stop just outside a zone boundary can double as a staging point before entering restricted streets, consolidating two planning problems into one stop.

Sizing the Window Without Padding the Whole Day

Overcompensating is the common failure mode — schedulers add 45 minutes of buffer per route "to be safe," which compounds across a week into lost delivery capacity. A better approach sizes the charge window to the vehicle's actual opportunity-charging curve: most EVs gain charge fastest in the first 20–30 minutes, with diminishing returns after that. Scheduling a 25-minute window at a natural dwell point usually recovers more usable range per minute than a 45-minute standalone stop bolted onto the end of a route.

Where fleet management software is used to sequence stops, charge windows should be entered as a stop type with realistic duration and location constraints — not as a note in the margins. Tools like Fleetkeur are increasingly used to model these windows alongside delivery appointments and zone restrictions