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Lifetime Average Wh/mi

flightdoc

New Member
Dec 2, 2013
1
0
Hawaii
I happily took delivery of our P85 March 15, 2012. We live in Hawaii and had previously installed a solar array to zero out our electric bill via a net metering agreement with the local utility (we use the grid as a battery) so we have a pretty exact account of our electrical use and production.
Since delivery we've driven 9413 miles and the car reports an average energy use of 329 wh/mile (85% of my 35.9 mile/day average commute is freeway with the cruise control set at 65 or 70 with air conditioning) which I realize it to the high side.
However, since delivery, and no other changes to our electrical system, our use at the meter for the past 9 months is increased by 21,000 Wh/day over our previous 2 years of usage. This breaks down to about 585 wh/mile measured at the meter.
In summary we are seeing a real world charging efficiency of about 56%.
This is a little bit of an issue as our electrical rates are about 32 cents a KwH (yeah we're getting raped out here) and the second solar array we installed to run the car is woefully inadequate. Unfortunately, the local utility has put the breaks on additional solar installations as so many people out here have them they are worried it will start causing grid instability.
Don't get me wrong, I am as happy as a clam with our new car and would never go back to a gas ride, but I sure wish I would have known this back when we could still have solar installed.
Perhaps others will find this data useful.
 

Klaus

Member
Apr 20, 2013
513
62
IMG_2629.JPG
 

Tommy

Member
Mar 3, 2010
882
3
The great OC
At the one year anniversary of ownership these are my numbers:

322 Wh/mi, 29,400 miles, 85/19", O.C. Calif.

Note to self: the smiles per mile average about a 1 to 1 ratio.
 
I happily took delivery of our P85 March 15, 2012. We live in Hawaii and had previously installed a solar array to zero out our electric bill via a net metering agreement with the local utility (we use the grid as a battery) so we have a pretty exact account of our electrical use and production.
Since delivery we've driven 9413 miles and the car reports an average energy use of 329 wh/mile (85% of my 35.9 mile/day average commute is freeway with the cruise control set at 65 or 70 with air conditioning) which I realize it to the high side.
However, since delivery, and no other changes to our electrical system, our use at the meter for the past 9 months is increased by 21,000 Wh/day over our previous 2 years of usage. This breaks down to about 585 wh/mile measured at the meter.
In summary we are seeing a real world charging efficiency of about 56%.
This is a little bit of an issue as our electrical rates are about 32 cents a KwH (yeah we're getting raped out here) and the second solar array we installed to run the car is woefully inadequate. Unfortunately, the local utility has put the breaks on additional solar installations as so many people out here have them they are worried it will start causing grid instability.
Don't get me wrong, I am as happy as a clam with our new car and would never go back to a gas ride, but I sure wish I would have known this back when we could still have solar installed.
Perhaps others will find this data useful.

"Grid instability". That's sad. Guess they had too many people not paying their high prices for electricity and had to put a stop to it.
 

neroden

Model S Owner and Frustrated Tesla Fan
Apr 25, 2011
14,676
62,627
Ithaca, NY, USA
I happily took delivery of our P85 March 15, 2012. We live in Hawaii and had previously installed a solar array to zero out our electric bill via a net metering agreement with the local utility (we use the grid as a battery) so we have a pretty exact account of our electrical use and production.
Since delivery we've driven 9413 miles and the car reports an average energy use of 329 wh/mile (85% of my 35.9 mile/day average commute is freeway with the cruise control set at 65 or 70 with air conditioning) which I realize it to the high side.
However, since delivery, and no other changes to our electrical system, our use at the meter for the past 9 months is increased by 21,000 Wh/day over our previous 2 years of usage. This breaks down to about 585 wh/mile measured at the meter.
In summary we are seeing a real world charging efficiency of about 56%.
This is a little bit of an issue as our electrical rates are about 32 cents a KwH (yeah we're getting raped out here) and the second solar array we installed to run the car is woefully inadequate. Unfortunately, the local utility has put the breaks on additional solar installations as so many people out here have them they are worried it will start causing grid instability.
Don't get me wrong, I am as happy as a clam with our new car and would never go back to a gas ride, but I sure wish I would have known this back when we could still have solar installed.
Perhaps others will find this data useful.
Hmm. Have you (a) gotten switched over to firmware 5.8 and (b) had your 12-volt battery replaced with the newer, "less vampiric" one (which seems to be done automatically with service)?

In the slightly longer run, you may benefit financially from going off the grid. Sure, batteries cost a lot, but compared to the "grid" alternative in Hawaii -- 32 cents per kWh *and* a prohibition on added solar -- it might be an excellent move. And of course the more people who go off the grid, the more room there is for other people to add solar panels within the electrical company's "limits", so it would be a socially valuable thing to do.
 

Mario Kadastik

Active Member
Sep 5, 2013
2,189
1,396
Rae, Harjumaa, Estonia
So do you guys just keep one of the trip meters untouched or is there some way to read out the lifetime usage from somewhere? Right now I still have the B trip meter as it was from the epoch, but I've already used A for something and might want in the future to use A and B, but if there is no way to read lifetime averages otherwise I'll keep the B untouched.
 

araxara

S-P85#3,218 X-LR M3AWD
May 11, 2012
1,016
381
Tucson, AZ
So do you guys just keep one of the trip meters untouched or is there some way to read out the lifetime usage from somewhere? Right now I still have the B trip meter as it was from the epoch, but I've already used A for something and might want in the future to use A and B, but if there is no way to read lifetime averages otherwise I'll keep the B untouched.
Yes, that's right. You need to keep Trip B un-reset. Mine, for example, is still from the epoch, as you said. Another option would be to record it's value or take a picture of it before you reset it. I usually record the current Trip B at significant events, such as software upgrades or tire swaps.
 

Mario Kadastik

Active Member
Sep 5, 2013
2,189
1,396
Rae, Harjumaa, Estonia
What's the second to last column you guys report? I guess if I wanted to report my usage I'd have to convert.

Mario Kadastik 465 235.5 Estonia 85 19 ? 13.12.13

The Wh/km and km ones are 289Wh/km for 379km. Not to have it for entry right now to understand it. The car is ordered with 21", but it's been running on 19" since I got it as it's winter time.
 

Bugeater

Member
May 11, 2013
450
14
Silicon Valley
Happy birthday to HoneyBug's Model S! It is 1 today!!! Here are the 1 year stats.
nany2e9u.jpg

Wh Miles State Battery Wheels N LastUpdate
349 15,675 CA 85 21 1 2013-12-15
Thank you Elon and all of Tesla! What a car!
 

glhs272

Unnamed plug faced villian
Aug 21, 2013
909
564
Burlington, WI
That's just how I have been interpreted it, but I might be wrong. May also have something to do with number of posted updates. I combed through some of the older pages and some places I seen N=15.. so guess I am not sure. But if it does not mean which Tesla, what about the multi-Tesla owners?
 

tomas

Out of warranty...
Oct 22, 2012
4,247
3,829
Chicago/Montecito
One year whammy figures today!

Wh Miles State Battery Wheels N LastUpdate
331 11,095 IL 85 21 1 2013-12-18

One caveat… wheels 21 for most of year, changed to 20 around halloween.
 

ljwobker

Geek.
Nov 30, 2012
241
22
Raleigh, NC
Yes, that's right. You need to keep Trip B un-reset. Mine, for example, is still from the epoch, as you said. Another option would be to record it's value or take a picture of it before you reset it. I usually record the current Trip B at significant events, such as software upgrades or tire swaps.

GASP- there's no web history to pull this data? Nissan's car wings web app will show you miles and efficiency on a month by month basis....
 

jerry33

(S85-3/2/13 traded in) X LR: F2611##-3/27/20
Mar 8, 2012
19,626
22,235
Texas
GASP- there's no web history to pull this data? Nissan's car wings web app will show you miles and efficiency on a month by month basis....

Given that Nissan has almost 160,000 employees and Tesla has maybe 6,000 (world wide) it's hardly surprising that Tesla's software is a work-in-progress.
 

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