EV calculators
Charging time
Pick a model from the catalogue, set the charge window, and see how long the session actually takes at a given charging post's power.
%
The state of charge you start the session from.
%
The state of charge you end the session at.
Charging post power
The post's maximum rated power — the car never draws more than this, even where its own curve would allow it.
kW
Enter the station's real rating if it differs from the three typical values above — e.g. the power printed on a specific charger's spec sheet.
Result
Opel Frontera Electric 44 kWh · curve calibrated to the claimed window 100 kW, 20–80%, 26 min
- Charging time
- 26 min
- Energy delivered
- 26.3 kWh
- Average power
- 60.6 kW
- Range added
- 144 km
curve calibrated to the claimed window 100 kW, 20–80%, 26 min
- Car's own power curve
- Power delivered at this post
| State of charge | Car's power | Delivered power |
|---|---|---|
| 20% | 96 kW | 96 kW |
| 23% | 96 kW | 96 kW |
| 26% | 96 kW | 96 kW |
| 29% | 96 kW | 96 kW |
| 32% | 96 kW | 96 kW |
| 35% | 90 kW | 90 kW |
| 38% | 83 kW | 83 kW |
| 41% | 77 kW | 77 kW |
| 44% | 71 kW | 71 kW |
| 47% | 64 kW | 64 kW |
| 50% | 58 kW | 58 kW |
| 53% | 56 kW | 56 kW |
| 56% | 55 kW | 55 kW |
| 59% | 53 kW | 53 kW |
| 62% | 52 kW | 52 kW |
| 65% | 50 kW | 50 kW |
| 68% | 47 kW | 47 kW |
| 71% | 45 kW | 45 kW |
| 74% | 42 kW | 42 kW |
| 77% | 40 kW | 40 kW |
| 80% | 37 kW | 37 kW |
Charging time FAQ
- How does the calculator know the charging power curve?
- Once you pick a model from the EvCompass catalogue, its usable battery capacity and charging power curve fill in automatically — there is no spec to type in yourself.
- Why does the post I pick change the time so much?
- A post never delivers more power than its own rating, even when the car's curve would allow more at that moment. On a 50 kW post, a car capable of 150 kW still charges at a speed capped at 50 kW for the whole session.
- Is the power curve measured by the manufacturer?
- No. When the curve is calibrated, it means we shaped it to match ONE claimed figure from the manufacturer's own data (e.g. 85 kW, 0-80%, 35 min) — that is one data point, not a measured charging run. Where no such figure exists, the curve is entirely estimated from the car's specs instead. Neither one is a measurement.