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Lifetime Average Wh/mi

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Impressive numbers, Brass guy
You are in Jerry33 territory
I have found the magic multiplier number is 1.3
You just multiply the number the car shows by 1.3
And you get the correct usage.
It correlates with mknox numbers.

Here are my numbers for August
AUG WM.JPG
 
P85-21" (Dec 2012 delivery, over 33k miles so far!)
345 Wh/mi here is Southern California

I've noticed that the average energy consumption varies a lot - probably based on environmental conditions and driving style.

For those of you using EVTripPlanner (EV Trip Planner) to do energy estimates for road trips, I'd love to hear if it has been accurate (despite variation in averages). Most users say it is within 5% (with proper speed, payload and temperature input) unless they hit a big storm or high winds.

If you aren't using our planning tool you should check it out! It also includes a full charger database (Super and Conventional).

We have thousands of users and have become the de-facto standard for planning a trip with your Tesla (other EVs aren't really practical for road trips yet...). My son started this site when he was 15 - now he's 17 and doing college applications. All donations to the site go toward his college fund! https://evtripplanner.com/donate/index.php
 
Figured I'd throw in another post on charging efficiency Since I had an opportunity to get a good read on it recently. My office installed some charge-point chargers a couple months ago and has decided, for the moment, not to charge employee's for using them. So needless to say I've been using these chargers almost exclusively to charge the car since. As I cut down on charging else where I'll be able to use the charge-point website, which gives some great stats, to compare what the car took in versus what it put out over a certain time period. For the period from 9-2 to 9-12 the the trip meter says the car delivered 179.4 kWh, over that same period Charge-Point says it delivered 219.439 kWh, which comes out to 81.75% charging efficiency or 18.25% charging losses. The car had Eco and Sleep mode enabled the whole time but obviously "The Vampire" still figures into this calculation, but temperatures were mild during this time period so heating and cooling while stopped weren't an issue.

Just another data point, but I'm pretty happy with these numbers. Assuming the 2.5 kWh per day vampire number that Jeff has determined for his car is also accurate for mine the "real" efficiency number is more like 93% over this 10 day period. Somewhere in between those two efficiency numbers is probably where I'm at.
 
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I think I've got my consumption pretty much nailed down. There's three things that keep my consumption high: lots of stop/go city driving, precooling during hot days in Miami, and 80+ mph highway speeds and/or rain. But pretty much every time, anywhere, I can count on two numbers: an estimate of needing 1.4x rated miles to reach my destination will either be accurate or slightly conservative, and my overall energy consumption is 365 Wh/mile. Here's the actual stats:

Format: total miles, miles this period, Wh/mile this period, Wh/mile lifetime

* 130329-140430: 7275, 000, 366, 366
* 140501-140531: 7775, 500, 366, 366
* 140601-140630: 8026, 251, 339, 365
* 140701-140731: 8166, 140, 347, 365
* 140801-140831: 8642, 476, 369, 365
 
I think I've got my consumption pretty much nailed down. There's three things that keep my consumption high: lots of stop/go city driving, precooling during hot days in Miami, and 80+ mph highway speeds and/or rain. But pretty much every time, anywhere, I can count on two numbers: an estimate of needing 1.4x rated miles to reach my destination will either be accurate or slightly conservative, and my overall energy consumption is 365 Wh/mile. Here's the actual stats:

Format: total miles, miles this period, Wh/mile this period, Wh/mile lifetime

* 130329-140430: 7275, 000, 366, 366
* 140501-140531: 7775, 500, 366, 366
* 140601-140630: 8026, 251, 339, 365
* 140701-140731: 8166, 140, 347, 365
* 140801-140831: 8642, 476, 369, 365
Holy Cow! you have over 140,000 miles already?! I'm just about to touch 40k and am at the upper end for Model S owners. That is a lot of monthly mileage. You buying new tires every 3 months?
 
140801-140831: 8642, 476, 369, 365

Holy Cow! you have over 140,000 miles already?! I'm just about to touch 40k and am at the upper end for Model S owners. That is a lot of monthly mileage. You buying new tires every 3 months?

I think that this decodes to Aug 1, 2014 - Aug 31 2014: 8,641 total miles, 476 miles this month, 369 Wh/mi this month, 365 Wh/mi lifetime.