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.

Charging time

Start of charge (%)

The state of charge you start the session from.

End of charge (%)

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.

Custom station power (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.

Maserati GranTurismo Folgore · curve calibrated to the claimed window 270 kW, 20–80%, 18 min

Charging time: 21 min
Energy delivered: 49.8 kWh
Average power: 139.7 kW
Range added: 252 km

curve calibrated to the claimed window 270 kW, 20–80%, 18 min

Car's own power curve
Power delivered at this post

The car's own power and the power actually delivered at the chosen post, by state of charge
State of charge	Car's power	Delivered power
20%	259 kW	150 kW
23%	259 kW	150 kW
26%	259 kW	150 kW
29%	259 kW	150 kW
32%	259 kW	150 kW
35%	242 kW	150 kW
38%	226 kW	150 kW
41%	209 kW	150 kW
44%	192 kW	150 kW
47%	176 kW	150 kW
50%	159 kW	150 kW
53%	154 kW	150 kW
56%	149 kW	149 kW
59%	145 kW	145 kW
62%	140 kW	140 kW
65%	135 kW	135 kW
68%	129 kW	129 kW
71%	123 kW	123 kW
74%	116 kW	116 kW
77%	110 kW	110 kW
80%	104 kW	104 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.

Result

Charging time FAQ