Departure-time charging is a timer that works backwards. Instead of telling the car when to start charging, you tell it when you leave, and the car picks the start time itself so the battery hits your target by then. Many cars pair it with cabin preconditioning, warming or cooling the interior on wall power near the end.
Key Takeaways
- Departure-time charging sets a ready-by time; the car counts back and picks its own start.
- It often adds preconditioning on wall power, so you leave with a full battery and a warm cabin.
- Readiness is not the same as cheapness — check the session still lands in off-peak hours.
- Run the schedule in one place only: the car or the charger, not both.
Start-Time Timer vs Departure Timer
Both are scheduling, but they answer different questions. A start-time timer answers “when should charging begin?” A departure timer answers “when must the car be ready?” The difference matters most on slow charging, where a wrong start time means a car still short at breakfast.
| Setting | You choose | The car or charger chooses | Weak point |
|---|---|---|---|
| Start-time timer | The hour charging begins | Nothing — it starts on the dot | You must guess how long the charge takes |
| Departure timer | The time you leave, and a target charge level | The start time, counted back from your departure | An early trip can catch it mid-charge |
| No timer | Nothing | Nothing — charging starts at plug-in | The car may sit full for hours and miss cheap hours |
How the Car Works Backwards
The car counts back from three things it already knows: the battery’s current charge, your target level, and the speed of the charger it is plugged into. Home charging speeds are predictable — the U.S. Department of Transportation puts Level 1 at about 1 kW (2–5 miles of range per hour) and Level 2 at 7–19 kW (10–20 miles per hour). A car needing about three hours of Level 2 charging to hit its target, with a 7 a.m. departure set, will plan to start at about 4 a.m. That is the logic, in round numbers; systems allow a margin.
The Preconditioning Bonus
Departure settings often do a second job before you leave: warming or cooling the cabin, and sometimes the battery, while the car is still plugged in. That energy comes from the wall, not the battery, so you leave with the planned charge and a comfortable cabin. It is also why such a car may draw power at odd moments in the morning after charging has finished — the draw is the heater, not a fault. Our guide to wallbox features and scheduling shows where these settings sit.
Departure Time and Cheap Hours Are Not the Same Setting
A departure timer optimises for readiness, not price. Left to itself, it starts as late as it safely can, which may or may not land inside your tariff’s cheap window. If low overnight prices are the goal, that is the job of scheduled charging on a time-of-use tariff, and the two combine well: a departure target, with the session steered into cheap hours when there is slack. It cannot change the total energy you use — savings come from timing alone, as the breakdown in what it costs to charge an electric car at home shows. One practical rule: let one device run the schedule. If car and charger both hold timers, they can block each other, so set the departure time in one place only.
Chargers That Work With a Departure Routine
The departure timer itself lives in the car, so almost any charger works with it — the charger just delivers power when asked.
An app-connected wallbox adds its own scheduling for households that want control at the charger: the EVDANCE EV-ACT3204PE 22 kW wallbox offers app control and RFID, while the EV-ACT5006T 48A Level 2 wall charger suits North American homes wanting a faster session inside a shorter night. Check the exact model’s feature list first, because timer functions vary.
Frequently Asked Questions
Does departure-time charging save money?
Not by itself. It guarantees readiness; savings depend on whether it lands in cheap hours. On a time-of-use tariff, check its start time falls inside the off-peak window.
What if I leave earlier than the time I set?
The car may be part-charged. Use the override — a “charge now” button in the app or car — which starts immediately without deleting your stored departure time.
Do I need a smart charger to use a departure timer?
No. The feature is part of the car and works with a basic wallbox or portable charger. A smart charger just adds a second place to schedule.
Related Reading
- Smart Charging and Time-of-Use Tariffs: How Scheduling Cuts EV Charging Costs
- Wallbox Home Charger Features Explained: Display, Scheduling, and Load Management
- How Much Does It Cost to Charge an Electric Car at Home?
- Do You Need a Smart Meter for an EV Charger?
