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Super Charging Math Doesn’t Seem Correct

EdisonFire

Member
Sep 2, 2015
176
139
NJ
I was doing a long distance trip from Buffalo back to New York I stopped at the supercharger in Erwin New York. Temps 83 degrees. My car is 2015 70D with 240 rated miles. Display showed 242 miles/hour charging but only 40 KW With 50 minutes to charge 62 more miles. Can 40KW charge at a rate of 240m/hr? I’ll post pic but the equation seems off
 

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thefortunes

Active Member
Jun 14, 2013
1,079
1,269
Wisconsin
The 240 mi/hr is the average of what you have achieved so far during the session (and really should just be ignored).

The 40kW is what you are currently getting and is a number you can use and understand (at 40kW you get about 2 miles of range added for each additional minute you charge, depending on what vehicle you are driving).

Since you are charging to 100% (why?) the 50 minutes remaining can have a large variation.
 

EdisonFire

Member
Sep 2, 2015
176
139
NJ
The attempt at full charging might get me home without additional stops


. QUOTE="thefortunes, post: 2795072, member: 14399"]The 240 mi/hr is the average of what you have achieved so far during the session (and really should just be ignored).

The 40kW is what you are currently getting and is a number you can use and understand (at 40kW you get about 2 miles of range added for each additional minute you charge, depending on what vehicle you are driving).

Since you are charging to 100% (why?) the 50 minutes remaining can have a large variation.[/QUOTE]
 

eladts

Member
Jul 31, 2016
823
1,141
Brookline, MA
Charging to 100% will not save you time since between 90% and 100% supercharging isn't much faster than L2 charging. It will take less time to charge to 80% or so and charge again along the way.

The attempt at full charging might get me home without additional stops.
Since you are charging to 100% (why?) the 50 minutes remaining can have a large variation.
 

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