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.

Geely EX5 Max+ · curve calibrated to the claimed window 120 kW, 30–80%, 20 min

Charging time: 23 min
Energy delivered: 41 kWh
Average power: 106.1 kW
Range added: 219 km

curve calibrated to the claimed window 120 kW, 30–80%, 20 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%	126 kW	126 kW
23%	126 kW	126 kW
26%	126 kW	126 kW
29%	126 kW	126 kW
32%	126 kW	126 kW
35%	126 kW	126 kW
38%	126 kW	126 kW
41%	125 kW	125 kW
44%	121 kW	121 kW
47%	118 kW	118 kW
50%	114 kW	114 kW
53%	110 kW	110 kW
56%	107 kW	107 kW
59%	103 kW	103 kW
62%	99 kW	99 kW
65%	96 kW	96 kW
68%	92 kW	92 kW
71%	87 kW	87 kW
74%	82 kW	82 kW
77%	76 kW	76 kW
80%	71 kW	71 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