We have a lot of people reporting, on numerous threads, that the Model S has range reduction issues in cold weather. I would like to collect some data to determine, in the real world, how the Model S performance fairs at different temperatures. To do this I need data (from you). If people with a dedicated electric meter can post power usage information I would be happy to crunch the numbers and maybe we could determine some real world information about this issue.
I would like to determine 1) power overhead to run the car. i.e. the Model S reports how many KWh it consumes when "on", but doesn't report how many KWh when it is "off", 2) Estimates of wh/m while driving. and 3) Charging efficiency. I would like to determine all three of these as a function of temperature. If this thread decides to try to derive additional results I will be happy to add them to this list.
What I would like people to post is. 1) Time covered by your report (in hours). The period reported should start and end with the car fully charged (either standard or max range setting). 2) Miles/KM driven. Please specify units. 0 means you were just charging for the time covered. 3) Power consumed as indicated by your dedicated utility meter, for the time covered (i.e. end meter reading - start meter reading). 4) What Model S said it consumed for the time covered (You might consider using the A or B trip meter. and 5) You best guess of what the average temperature was for the time covered. 6) Anything else you think is important.
Ideally I would like this study to last for 1 year (that may be asking to much.... but I can ask).
I will set up a public spread sheet to allow all of us a chance to review and comment on the analysis of the data.