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.

Cadillac LYRIQ 600 E4 (2024) · curve calibrated to the claimed window 190 kW, 0–80%, 30 min

Charging time: 26 min
Energy delivered: 61.2 kWh
Average power: 142.3 kW
Range added: 276 km

curve calibrated to the claimed window 190 kW, 0–80%, 30 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
0%	200 kW	150 kW
4%	200 kW	150 kW
8%	200 kW	150 kW
12%	200 kW	150 kW
16%	200 kW	150 kW
20%	195 kW	150 kW
24%	191 kW	150 kW
28%	186 kW	150 kW
32%	181 kW	150 kW
36%	177 kW	150 kW
40%	172 kW	150 kW
44%	167 kW	150 kW
48%	162 kW	150 kW
52%	157 kW	150 kW
56%	152 kW	150 kW
60%	147 kW	147 kW
64%	141 kW	141 kW
68%	134 kW	134 kW
72%	126 kW	126 kW
76%	119 kW	119 kW
80%	112 kW	112 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