Lifetime Average Wh/mi

[Great Dane]

Okay, here we go for my March numbers:

From car:

Lifetime: 22,596.6 miles / 7,885.5 kWh / 349 Wh/mi
March: 1,953.9 miles / 773.2 kWh / 396 Wh/mi

From my Power Meter:

March: 1,953.9 miles / 1,060.4 kWh / 542.7 Wh/mi

]

mknox

I have a question for you
what amps do you charge at ?
the losses in power worry me a lot
250 kw loss is not something easy to overlook
is the car really lying that bad to us ?
have not got my electric bill since I bought the car
if it is that far off the computer needs to be fine tuned to
tell us the real energy used instead of such a fictitious number .

 

[kendallpb]

I forgot to record this Tuesday, but this is really ony one day late. (I haven't driven since getting home Wednesday night.) Much less driving than last month, but winter! never! ends! ;-) But seriously, I do expect the numbers to start dropping soon; or maybe it's just my heavy foot....

ONE-MONTH:
kendallpb 04-02-2014 362 904.4 MD S85 19" (Mar.)

LIFETIME:
kendallpb 11-09-2013 325 11,699* MD S85 19"
kendallpb 12-01-2013 328 12,596 MD S85 19"
kendallpb 01-03-2014 333 14,460 MD S85 19"
kendallpb 02-01-2014 338 15,637 MD S85 19"
kendallpb 03-02-2014 341 17,326 MD S85 19"
kendallpb 04-02-2014 342 18,230 MD S85 19"

 

[Al Sherman]

My March and Lifetime numbers.

March: Al Sherman, 311, 1085, IN, P85, 19, 1, 4/1/14

Life: Al Sherman, 307, 10,497, IN, P85, 19/21, 1, 4/1/14

 

[mknox]

]

I have a question for you
what amps do you charge at ?
the losses in power worry me a lot
250 kw loss is not something easy to overlook
is the car really lying that bad to us ?
have not got my electric bill since I bought the car
if it is that far off the computer needs to be fine tuned to
tell us the real energy used instead of such a fictitious number .

Just to set the stage, I use a TED energy monitor at home with a dedicated set of CTs on the EV circuit. I also track the energy I put in to the car when charging at public stations. For ChargePoint, I simply log in to my account and record the energy I used in the month. At other stations, I track the volts, amps and charge duration on a spreadsheet where I calculate the kWhrs. I simply add all of my energy inputs up and divide by the number of miles driven in the month.

In answer to your question, I charge at 16 amps /240 volts continuous at home and use public chargers ranging from 24 amps to 70 amps continuous (I have dual chargers).

There is always a significant difference between what the car reports and what I actually use. The car only records the amount of energy coming out of the battery while being driven, and doesn't account for losses in the circuitry during charging and (vampire) losses while sitting parked.

I think it would be useful if the car had a register to show how much energy was input in addition to the one it already has showing how much is used while being driven.

 

[Jeff Miller]

Total Miles 1,552,924

Total Drivers 185

Summary

wh/mile
avg 337
median 336
stdev 37
dist_wt_avg 332


State / Province / Country

State Wh N Miles
1 AB 308 2 6913
2 AK 330 2 25329
3 AZ 319 9 66961
4 BC 336 3 20626
5 CA 335 45 366790
6 CO 348 5 24512
7 CT 330 1 11000
8 ESTONIA 396 1 4445
9 FL 332 9 84264
10 GA 306 3 55054
11 HI 305 3 15431
12 IL 357 17 72345
13 IN 352 3 22378
14 MA 345 3 15830
15 MD 332 3 62161
16 MI 338 2 20275
17 MN 345 6 34649
18 MO 301 3 54960
19 NC 315 2 9682
20 NETHERLANDS 409 1 6211
21 NH 279 1 7000
22 NJ 374 3 40500
23 NV 301 1 5000
24 NY 331 4 20948
25 OH 381 1 6028
26 ON 356 2 28805
27 OR 367 8 88261
28 PA 366 2 23370
29 QC 304 2 21013
30 TX 320 12 113716
31 UT 330 2 20012
32 VA 311 6 58184
33 WA 361 13 95328
34 WI 302 2 20544
35 WY 293 1 6659


Battery

Battery Wh N Miles stdev
1 40 300 5 16311 43
2 60 311 38 295316 25
3 85 345 128 1122415 35


Wheels

Wheel Wh N Miles stdev
1 19 325 105 920483 35
2 21 354 50 404018 32


Battery and Wheels

Battery Wheels Wh N Miles stdev
1 40 19 283 4 15561 22
2 60 19 311 37 291522 25
3 85 19 335 62 583032 35
4 60 21 297 1 3794 NA
5 85 21 355 49 400224 32


Battery, State/Province/Country, and Wheels

State Battery Wheels Wh N Miles
1 AB 60 19 321 1 6000
2 AB 85 21 295 1 913
3 AK 85 19 330 2 25329
4 AZ 60 19 317 3 29271
5 AZ 85 19 306 2 6950
6 AZ 85 21 313 3 29990
7 BC 60 19 331 1 3386
8 BC 85 19 335 1 10040
9 CA 60 19 307 10 87435
10 CA 85 19 319 13 114292
11 CA 85 21 357 16 136583
12 CO 85 19 346 2 8900
13 CO 85 21 343 1 2765
14 CT 85 19 330 1 11000
15 ESTONIA 85 19 396 1 4445
16 FL 60 19 288 1 22100
17 FL 85 19 338 1 5165
18 FL 85 21 336 5 39514
19 GA 85 19 292 2 32054
20 HI 60 19 289 1 2224
21 HI 60 21 297 1 3794
22 IL 40 19 294 2 6561
23 IL 60 19 347 3 17721
24 IL 85 19 363 5 21306
25 IL 85 21 371 6 24957
26 IN 85 19 347 1 2881
27 MA 85 19 345 2 14930
28 MA 85 21 345 1 900
29 MD 60 19 294 1 6836
30 MD 85 19 342 1 18230
31 MD 85 21 359 1 37095
32 MI 60 19 319 1 5298
33 MI 85 19 357 1 14977
34 MN 60 19 323 3 14459
35 MN 85 19 358 1 12579
36 MN 85 21 370 2 7611
37 MO 40 19 266 1 2000
38 MO 85 19 318 1 27471
39 NC 85 19 266 1 2059
40 NC 85 21 364 1 7623
41 NETHERLANDS 85 21 409 1 6211
42 NH 40 19 279 1 7000
43 NJ 60 19 340 1 900
44 NJ 85 19 358 1 36000
45 NV 60 19 301 1 5000
46 NY 60 19 281 1 4297
47 NY 85 19 361 2 12351
48 OH 85 19 381 1 6028
49 ON 85 19 356 2 28805
50 OR 60 19 328 1 12994
51 OR 85 19 384 2 5233
52 OR 85 21 359 3 54348
53 PA 85 21 366 2 23370
54 QC 60 19 310 1 3000
55 TX 60 19 314 1 19491
56 TX 85 19 318 7 76825
57 TX 85 21 318 2 13300
58 UT 85 19 328 1 4012
59 VA 60 19 298 2 24625
60 VA 85 19 308 3 29959
61 VA 85 21 342 1 3600
62 WA 60 19 299 2 7401
63 WA 85 19 368 4 44552
64 WA 85 21 394 3 11444
65 WI 60 19 292 1 9744
66 WY 85 19 293 1 6659


Data

Wh Miles State Battery Wheels LastUpdate
aaron.s 352 7000 NY 85 19 05/13/13
AC1K 295 913 AB 85 21 08/22/13
ajros1 332 1100 TX NA NA 10/31/13
Al Sherman 307 10497 IN 85 NA 04/01/01
AMN 340 2502 MN 85 21 08/28/13
AmpedRealtor 304 2700 AZ 85 19 10/24/13
Andrew Wolfe 333 4600 CA 85 21 05/13/13
AndyM 355 21000 OR 85 21 11/27/13
AnOutsider 409 8567 PA 85 21 05/13/13
araxara 297 7969 AZ 85 21 06/07/13
Banahogg 310 4500 CA 60 19 06/11/13
bbmertz 348 2200 CA 85 NA o
Beavis 343 2765 CO 85 21 o
Ben W 359 12500 CA 85 21 10/01/13
Benjamin Brooks 306 16825 CA 85 19 02/28/14
Bifff67 330 10815 VA 85 19 10/01/13
bigsmooth125 299 4000 TX 85 19 05/23/13
bob_p 326 3000 TX 85 NA o
bosgig 345 900 MA 85 21 o
Brad-isa 365 1490 IL 60 19 o
Brass Guy 306 9700 MA 85 19 01/14/14
Brett 350 3896 CA NA NA 11/04/13
brianman 389 22892 WA 85 NA 02/02/14
BriansTesla 294 1200 WA 60 19 06/14/13
BryanW 328 4012 UT 85 19 10/04/13
Bucket22 387 1244 IL 85 21 o
Bugeater 351 18303 CA 85 21 03/01/14
captain_zap 385 4004 WA 85 21 o
Cattledog 348 6400 TX 85 19 o
ChadS 361 6000 WA 85 19 o
Chgd Up 353 8400 <NA> NA NA o
ckessel 380 20000 OR 85 21 04/01/14
Cliff Hannel 344 19000 CA 85 21 12/02/13
Cottonwood 323 10000 CO 85 NA 11/04/13
cschock 314 11530 CA 85 19 02/14/14
Darmok 301 5000 NV 60 19 06/01/13
davecolene0606 310 13985 FL NA NA 06/15/13
David Trushin 378 1100 IL 85 19 o
DavidM 338 5165 FL 85 19 05/19/13
ddenboer 346 13000 CA 85 21 o
deaton52 353 12850 WA 85 19 08/13/13
Denarius 332 16000 UT 85 NA 04/01/14
DfibRL8R 296 20625 VA 60 19 02/04/14
dfitz206 335 23935 WA 85 19 03/17/14
dflye 364 7623 NC 85 21 o
digitaltim 359 37095 MD 85 21 12/12/13
dirkhh 328 12994 OR 60 19 04/01/14
dlmorgan999 397 1565 OR 85 19 o
dmckinstry 297 3160 WA 85 NA 09/07/13
DonD 288 22100 FL 60 19 02/17/14
dpodoll 297 3794 HI 60 21 12/31/13
drbradfo 430 686 OR NA NA o
drp 339 6100 IL 85 21 05/13/13
dtich 402 1300 CA 85 21 o
dwegmull 298 5521 CA 85 19 11/14/13
EarlyAdopter 399 6882 WA 85 21 01/27/14
eelton 404 1100 IL 85 19 o
efusco 318 27471 MO 85 19 03/31/14
eidco 348 2500 CA 85 19 03/07/14
ElSupreme 325 19100 GA 85 19 12/01/13
FlasherZ 403 1900 IL 85 21 o
flightdoc 329 9413 HI 85 NA 12/02/13
fluxemag 369 750 AZ 40 NA 06/11/13
gdh66 333 15000 OR NA NA 12/01/13
GeekGirls 302 14500 CA 85 19 12/01/13
gene 305 10000 CA 85 19 09/03/13
gg_got_a_tesla 310 21795 CA 60 19 03/31/14
glhs272 292 9744 WI 60 19 12/02/13
gmtom1 289 2224 HI 60 19 11/03/13
gnelson 296 1507 TX 85 21 08/25/13
gregincal 317 6256 CA 85 19 10/18/13
gtimbers 330 900 CA 85 19 o
hj-45 279 7000 NH 40 19 10/07/13
HTK 335 10040 BC 85 19 07/28/13
huntjo 380 2847 CO NA NA o
ibcs 381 6028 OH 85 19 o
IlliniT 291 7300 IL 60 19 06/07/13
Iz 281 4297 NY 60 19 07/31/13
J in MN 320 12039 MN 60 19 04/02/14
Jason 339 11793 TX 85 21 05/13/13
Jason S 351 4334 CA 85 NA o
jchangyy 323 1800 CA 85 19 o
Jdcleary 311 18032 AK 85 19 03/02/14
Jeff Miller 339 5516 IL 85 19 04/03/19
jeffnorman 357 1118 IL 85 21 07/28/13
jerry33 256 20659 TX 85 19 04/01/14
jhs_7645 399 558 WA 85 21 o
jive_devil 289 12285 CA 60 19 02/07/14
jjaeger 363 3974 CA 85 19 o
joer00 355 15034 FL 85 21 11/01/13
johndoe74 309 4250 AZ 85 19 06/08/13
johngray 391 4879 WA NA 19 o
jomo25 309 13444 AZ 60 19 03/04/14
jpasqua 290 2216 CA 60 19 06/02/13
jweinstein 350 7297 AK 85 19 09/03/13
kaivball 340 1400 CA 85 21 o
kcveins 331 10890 IL 85 19 10/04/13
kendallpb 342 18230 MD 85 19 04/02/14
Kipernicus 311 14500 CA 60 19 01/26/14
Kklabunde 347 2881 IN 85 19 o
Klaus Fechner 322 6826 CA 60 19 12/02/13
kvietor 301 14880 FL 85 21 10/29/13
lholtzman 364 2700 IL 85 19 o
Liz G 320 25489 MO NA 19 11/01/13
Lloyd 354 6467 CA 85 21 05/13/13
lolachampcar 311 4500 FL 85 21 06/15/13
Longhorn92 315 2261 IL 40 19 09/03/13
Maarten ST 409 6211 NETHERLANDS 85 21 02/09/14
mal42north 284 9340 <NA> 60 19 09/09/13
Mario Kadastik 396 4445 ESTONIA 85 19 03/17/14
mark 377 11500 TX 85 19 02/14/13
MassAmped 384 5230 MA 85 19 06/15/13
matthew.johnson 407 3500 IL 85 21 o
mckemie 279 7200 TX 85 19 06/30/13
mcornwell 337 14221 CA 85 21 12/01/13
meduri 332 23000 GA NA NA 10/31/13
merlynhough 370 3668 OR 85 19 12/02/13
MichaelS 283 13098 CA 60 19 01/14/14
michiganmodels 357 14977 MI 85 19 11/01/13
Mike_Schlechter 330 11000 CT 85 19 10/24/13
MitchL 383 3300 CA 85 21 o
mknox 349 22597 ON 85 19 04/02/14
mnx 362 6208 ON 85 19 07/26/13
Model S P 338 1919 AZ 85 21 05/23/13
Mossisthecat 331 3386 BC 60 19 07/12/13
Nathan Smith 322 14803 PA 85 21 09/03/13
neroden 370 5351 NY 85 19 10/28/13
Nickjhowe 340 1600 FL 85 21 o
NJS1207 424 3600 NJ 85 NA o
ohaq 319 5298 MI 60 19 08/21/13
paco3791 384 8931 IL 60 19 04/01/14
pbrulott 310 3000 QC 60 19 06/11/13
phx182flyer 304 20102 AZ 85 21 03/01/14
pilotSteve 422 1767 WA 85 19 o
Psullivan 333 7885 CA 85 21 05/13/13
qphan79 292 4740 CA 60 19 o
raptorweb 401 5109 MN 85 21 o
rcc 365 3500 CA 85 NA o
rdrcmatt 313 10800 WI NA NA 10/21/13
rlcordeiro 358 6600 CA 85 NA o
Rlsarch 374 3500 FL 85 21 10/30/13
Rodolfo Paiz 370 3500 FL NA NA 10/28/13
rpavlicek 326 6421 CA 60 19 07/12/13
Sacrament055 273 4300 IL 40 19 08/14/13
scaesare 308 3144 VA 85 19 07/01/13
schueppert 332 1066 TX 85 19 08/05/13
SCW-Greg 343 13348 OR 85 21 03/02/14
smd 369 7950 CA 85 NA 05/13/13
spaghetti 285 4878 CA 85 19 10/01/13
Sparrow 260 12954 GA 85 19 04/01/14
spatterso911 354 2000 CA 85 21 o
StephRob1 387 4938 CA 85 21 o
StephRob2 336 1054 CA 60 19 o
stevezzz 326 8900 CO 85 19 06/15/13
stsanford 321 4300 NY NA NA 08/26/13
sublimaze1 337 26000 TX 85 19 03/17/14
SuperCoug 368 1000 WA NA NA o
svoelpel 266 2059 NC 85 19 07/05/13
Tacket 304 6201 WA 60 19 09/12/13
tdiggity 345 760 CA 85 21 o
tesla2012 346 1500 AZ 60 19 06/11/13
tezco 366 NA CO 85 19 o
Todd Burch 287 16000 VA 85 19 10/25/13
Tomanik 321 6000 AB 60 19 01/02/13
tomas 331 11095 IL 85 21 12/18/13
Tommy 322 29400 CA 85 19 12/07/13
Toto_48313 298 18013 QC 85 NA 10/01/13
Treker56 301 4000 VA 60 19 08/10/13
Txjak 314 19491 TX 60 19 03/17/14
Ven Rala 294 6836 MD 60 19 08/31/13
Vern110 407 1800 IL 85 NA o
Vexar 367 1015 MN 60 19 o
Vger 342 7200 BC 85 NA 06/07/13
William13 403 9000 IN 85 NA 05/13/13
wraithnot 339 6208 CA 85 19 05/12/13
wycolo 293 6659 WY 85 19 06/15/13
XK8driver 342 3600 VA 85 21 o
xray 371 10131 CA 85 21 07/25/13
yobigd20 358 36000 NJ 85 19 01/20/14
youlikeadajuice 340 900 NJ 60 19 o
ZBB 296 14327 AZ 60 19 03/31/14
zdre 266 2000 MO 40 19 07/26/13
Zextraterrestrial 373 16778 CA 85 21 12/02/13
Zythryn1 358 12579 MN 85 19 06/25/13
Zythryn2 282 1405 MN 60 19 06/25/13


Deciles

wh/m
0% 256
10% 292
20% 304
30% 314
40% 327
50% 336
60% 344
70% 355
80% 368
90% 387
100% 430

 

[tomas]

Summary

wh/mile
avg 337

Uncanny. After 12k miles, my average is: 337.

 

[Jeff Miller]

I think it would be useful if the car had a register to show how much energy was input in addition to the one it already has showing how much is used while being driven.

I agree. Exactly one year ago tomorrow, I installed a dedicated meter. I've only charged my car at home, so all my recharging has been recorded on that meter.

Over this one year period, I've driven 5078 miles. The car says I've used 1711 kwh (337 wh/m). The wall meter says I've used 2756 kwh, 60% more than the car reports. For most people, this number will be much less than 60%. My numbers are high because I don't drive that much.

Assuming an 8% charging loss, (1711 -> 1.08*1711), "vampire" losses over the year were 2.5 kwh per day.

 

[ckessel]

27 OR 367 8 88261

Living in Oregon, I'm one of those numbers, but I'm really surprised Oregon is such chart topper. We're higher Wh/m than states that are much colder with significantly worse weather conditions, like Michigan, Wisconsin, Minnesota, etc.

We get a lot of rain, but does the extra rolling resistance from rain really make that big a difference?

 

[Jeff Miller]

Living in Oregon, I'm one of those numbers, but I'm really surprised Oregon is such chart topper. We're higher Wh/m than states that are much colder with significantly worse weather conditions, like Michigan, Wisconsin, Minnesota, etc.

We get a lot of rain, but does the extra rolling resistance from rain really make that big a difference?

That's an interesting question. I certainly observe a big increase in wh/mile when I drive in the rain. But I'm not sure what hard numbers are for wet pavement vs dry pavement. In another thread Todd Burch noted that rolling resistance for the Model S is about 1/3 of the air drag (which is a lot - most cars rolling is much less than air drag), partly because the car is very aerodynamic and mostly because the car is so heavy. So if we had an estimate for how much rolling resistance increases on wet vs dry pavement, we could get a rough estimate for the effect on wh/m.

Thinking a bit more, rolling resistance probably isn't affected much by rain. But there could be two other effects. One is just hitting the rain with the car thereby increasing drag, and the other is the tires kicking up lots of water and throwing it behind or under the car. I assume this has been studied?

- - - Updated - - -

Uncanny. After 12k miles, my average is: 337.

My numbers aren't far off at 339. I guess Chicago is close to the mean...

 

[dirkhh]

Living in Oregon, I'm one of those numbers, but I'm really surprised Oregon is such chart topper. We're higher Wh/m than states that are much colder with significantly worse weather conditions, like Michigan, Wisconsin, Minnesota, etc.

We get a lot of rain, but does the extra rolling resistance from rain really make that big a difference?

That's an interesting question. I certainly observe a big increase in wh/mile when I drive in the rain. But I'm not sure what hard numbers are for wet pavement vs dry pavement. In another thread Todd Burch noted that rolling resistance for the Model S is about 1/3 of the air drag (which is a lot - most cars rolling is much less than air drag), partly because the car is very aerodynamic and mostly because the car is so heavy. So if we had an estimate for how much rolling resistance increases on wet vs dry pavement, we could get a rough estimate for the effect on wh/m.

Thinking a bit more, rolling resistance probably isn't affected much by rain. But there could be two other effects. One is just hitting the rain with the car thereby increasing drag, and the other is the tires kicking up lots of water and throwing it behind or under the car. I assume this has been studied?

Actually, standing water (even a little) has massive impact on rolling resistance. But I think the other thing that affects us Oregonians badly is that many of us are in the PDX area and are driving hills all the time. I think that affects things much more than the rain.
Oh, and of course we may have some lead footed folks in the relatively small sample of only 8 drivers providing data. Especially when you see the breakdown by battery / tires: "51 OR 85 19 384 2 5233" - so we have two folks with 19" wheels on their 85s that have a rather frightening average.

 

[ckessel]

Actually, standing water (even a little) has massive impact on rolling resistance. But I think the other thing that affects us Oregonians badly is that many of us are in the PDX area and are driving hills all the time. I think that affects things much more than the rain.
Oh, and of course we may have some lead footed folks in the relatively small sample of only 8 drivers providing data. Especially when you see the breakdown by battery / tires: "51 OR 85 19 384 2 5233" - so we have two folks with 19" wheels on their 85s that have a rather frightening average.

Maybe...I have the same commute whether it's summer or winter and the Wh/mile is hugely different between the two and the primary difference is rain between the seasons and perhaps 20 degrees temperature while Chicago would have a much higher summer/winter variation in temperature.

And while we might have a lead foot or two , I doubt we're than much different than the Model S owner population as a whole. Plus, I doubt I'm one of the lead foot folks given I got 18,000 miles out of my 21" Contis and I'm still leading the Wh/mile categopry.

 

[dirkhh]

Maybe...I have the same commute whether it's summer or winter and the Wh/mile is hugely different between the two and the primary difference is rain between the seasons and perhaps 20 degrees temperature while Chicago would have a much higher summer/winter variation in temperature.

As I said, water on the road makes a big difference.

And while we might have a lead foot or two , I doubt we're than much different than the Model S owner population as a whole. Plus, I doubt I'm one of the lead foot folks given I got 18,000 miles out of my 21" Contis and I'm still leading the Wh/mile categopry.

You are missing my point. If you remove the two drivers I've singled out, the remaining six of us have much more in line numbers. It's because of the small sample size (8) that 2 outliers really can change the average.
Or said another way - the overall sample size used in this statistic isn't big enough to really allow creating truly comparable state by state numbers.

 

[ckessel]

You are missing my point. If you remove the two drivers I've singled out, the remaining six of us have much more in line numbers. It's because of the small sample size (8) that 2 outliers really can change the average.
Or said another way - the overall sample size used in this statistic isn't big enough to really allow creating truly comparable state by state numbers.

True, but Washington has another 13 drivers and a similar climate and similar numbers. I think our outliers aren't really that far out of the norm for the Pacific NW. It'd also mean they'd have to be extreme outliers for the entire set of drivers or we'd see other states with low representation with crazy outlier numbers and the stats aren't showing that.

 

[paco3791]

True, but Washington has another 13 drivers and a similar climate and similar numbers. I think our outliers aren't really that far out of the norm for the Pacific NW. It'd also mean they'd have to be extreme outliers for the entire set of drivers or we'd see other states with low representation with crazy outlier numbers and the stats aren't showing that.

I'll also add that time of ownership can make a big difference at this early stage. I got my S60 in October so my numbers are Skewed by that fact that most of my driving at this point has been in this, particularly bad, Chicago area winter.

 

[ckessel]

I'll also add that time of ownership can make a big difference at this early stage. I got my S60 in October so my numbers are Skewed by that fact that most of my driving at this point has been in this, particularly bad, Chicago area winter.

Good point. It's not just the quantity of folks reporting in, but whether they've had the car long enough that their numbers reflect multiple seasons of driving conditions.

 

[Jeff Miller]

Or said another way - the overall sample size used in this statistic isn't big enough to really allow creating truly comparable state by state numbers.

That's certainly true on a state by state basis. On the other hand, you can see broad patterns in for example northern vs southern states. But more data would definitely be good. Whoever is keeping track of numbers, it would be great to see them! (I may try to private message the people who haven't updated in a while and see if they are still keeping track.)

Just a minor technical question, the drag from driving in the rain seems to be significant as you and ckessel note. Is that drag really from increased rolling resistance, which from the thread I mentioned earlier I understood to be mostly related to deforming the tires, or is it from pushing water out of the way, and throwing it behind the wheels? Or maybe this effect is lumped in deformation and also called rolling resistance? In any event, it would be interesting to see the numbers on this if you know of any sources. ChadS in his post on "factors that affect range" estimates a 2% loss from wet pavement, but that seems low to me.

Here is the data by state. For OR, the median wh/m (362) is not too far off the mean (367). Likewise for WA, which I would expect to be broadly similar to OR in terms of climate, the mean (361) isn't too far off from the median (368) and both are close to OR's numbers. But I do agree that the sample sizes are small so we can't read too much into any one state's numbers. (A possible source of bias could be that for example some people only reported winter numbers - I'm not sure this is the case - it could the other way too - but having more data would certainly reduce this effect to the extent that it exists).

State: AB
Wh Miles N
AC1K 295 913 1
Tomanik 321 6000 1
------------------------------------------------------------------
State: AK
Wh Miles N
Jdcleary 311 18032 1
jweinstein 350 7297 1
------------------------------------------------------------------
State: AZ
Wh Miles N
AmpedRealtor 304 2700 1
araxara 297 7969 1
fluxemag 369 750 1
johndoe74 309 4250 1
jomo25 309 13444 1
Model S P 338 1919 1
phx182flyer 304 20102 1
tesla2012 346 1500 1
ZBB 296 14327 1
------------------------------------------------------------------
State: BC
Wh Miles N
HTK 335 10040 1
Mossisthecat 331 3386 1
Vger 342 7200 1
------------------------------------------------------------------
State: CA
Wh Miles N
Andrew Wolfe 333 4600 1
Banahogg 310 4500 1
bbmertz 348 2200 1
Ben W 359 12500 1
Benjamin Brooks 306 16825 1
Brett 350 3896 1
Bugeater 351 18303 1
Cliff Hannel 344 19000 1
cschock 314 11530 1
ddenboer 346 13000 1
dtich 402 1300 1
dwegmull 298 5521 1
eidco 348 2500 1
GeekGirls 302 14500 1
gene 305 10000 1
gg_got_a_tesla 310 21795 1
gregincal 317 6256 1
gtimbers 330 900 1
Jason S 351 4334 1
jchangyy 323 1800 1
jive_devil 289 12285 1
jjaeger 363 3974 1
jpasqua 290 2216 1
kaivball 340 1400 1
Kipernicus 311 14500 1
Klaus Fechner 322 6826 1
Lloyd 354 6467 1
mcornwell 337 14221 1
MichaelS 283 13098 1
MitchL 383 3300 1
Psullivan 333 7885 1
qphan79 292 4740 1
rcc 365 3500 1
rlcordeiro 358 6600 1
rpavlicek 326 6421 1
smd 369 7950 1
spaghetti 285 4878 1
spatterso911 354 2000 1
StephRob1 387 4938 1
StephRob2 336 1054 1
tdiggity 345 760 1
Tommy 322 29400 1
wraithnot 339 6208 1
xray 371 10131 1
Zextraterrestrial 373 16778 1
------------------------------------------------------------------
State: CO
Wh Miles N
Beavis 343 2765 1
Cottonwood 323 10000 1
huntjo 380 2847 1
stevezzz 326 8900 1
tezco 366 NA 1
------------------------------------------------------------------
State: CT
Wh Miles N
Mike_Schlechter 330 11000 1
------------------------------------------------------------------
State: ESTONIA
Wh Miles N
Mario Kadastik 396 4445 1
------------------------------------------------------------------
State: FL
Wh Miles N
davecolene0606 310 13985 1
DavidM 338 5165 1
DonD 288 22100 1
joer00 355 15034 1
kvietor 301 14880 1
lolachampcar 311 4500 1
Nickjhowe 340 1600 1
Rlsarch 374 3500 1
Rodolfo Paiz 370 3500 1
------------------------------------------------------------------
State: GA
Wh Miles N
ElSupreme 325 19100 1
meduri 332 23000 1
Sparrow 260 12954 1
------------------------------------------------------------------
State: HI
Wh Miles N
dpodoll 297 3794 1
flightdoc 329 9413 1
gmtom1 289 2224 1
------------------------------------------------------------------
State: IL
Wh Miles N
Brad-isa 365 1490 1
Bucket22 387 1244 1
David Trushin 378 1100 1
drp 339 6100 1
eelton 404 1100 1
FlasherZ 403 1900 1
IlliniT 291 7300 1
Jeff Miller 339 5516 1
jeffnorman 357 1118 1
kcveins 331 10890 1
lholtzman 364 2700 1
Longhorn92 315 2261 1
matthew.johnson 407 3500 1
paco3791 384 8931 1
Sacrament055 273 4300 1
tomas 331 11095 1
Vern110 407 1800 1
------------------------------------------------------------------
State: IN
Wh Miles N
Al Sherman 307 10497 1
Kklabunde 347 2881 1
William13 403 9000 1
------------------------------------------------------------------
State: MA
Wh Miles N
bosgig 345 900 1
Brass Guy 306 9700 1
MassAmped 384 5230 1
------------------------------------------------------------------
State: MD
Wh Miles N
digitaltim 359 37095 1
kendallpb 342 18230 1
Ven Rala 294 6836 1
------------------------------------------------------------------
State: MI
Wh Miles N
michiganmodels 357 14977 1
ohaq 319 5298 1
------------------------------------------------------------------
State: MN
Wh Miles N
AMN 340 2502 1
J in MN 320 12039 1
raptorweb 401 5109 1
Vexar 367 1015 1
Zythryn1 358 12579 1
Zythryn2 282 1405 1
------------------------------------------------------------------
State: MO
Wh Miles N
efusco 318 27471 1
Liz G 320 25489 1
zdre 266 2000 1
------------------------------------------------------------------
State: NC
Wh Miles N
dflye 364 7623 1
svoelpel 266 2059 1
------------------------------------------------------------------
State: NETHERLANDS
Wh Miles N
Maarten ST 409 6211 1
------------------------------------------------------------------
State: NH
Wh Miles N
hj-45 279 7000 1
------------------------------------------------------------------
State: NJ
Wh Miles N
NJS1207 424 3600 1
yobigd20 358 36000 1
youlikeadajuice 340 900 1
------------------------------------------------------------------
State: NV
Wh Miles N
Darmok 301 5000 1
------------------------------------------------------------------
State: NY
Wh Miles N
aaron.s 352 7000 1
Iz 281 4297 1
neroden 370 5351 1
stsanford 321 4300 1
------------------------------------------------------------------
State: OH
Wh Miles N
ibcs 381 6028 1
------------------------------------------------------------------
State: ON
Wh Miles N
mknox 349 22597 1
mnx 362 6208 1
------------------------------------------------------------------
State: OR
Wh Miles N
AndyM 355 21000 1
ckessel 380 20000 1
dirkhh 328 12994 1
dlmorgan999 397 1565 1
drbradfo 430 686 1
gdh66 333 15000 1
merlynhough 370 3668 1
SCW-Greg 343 13348 1
------------------------------------------------------------------
State: PA
Wh Miles N
AnOutsider 409 8567 1
Nathan Smith 322 14803 1
------------------------------------------------------------------
State: QC
Wh Miles N
pbrulott 310 3000 1
Toto_48313 298 18013 1
------------------------------------------------------------------
State: TX
Wh Miles N
ajros1 332 1100 1
bigsmooth125 299 4000 1
bob_p 326 3000 1
Cattledog 348 6400 1
gnelson 296 1507 1
Jason 339 11793 1
jerry33 256 20659 1
mark 377 11500 1
mckemie 279 7200 1
schueppert 332 1066 1
sublimaze1 337 26000 1
Txjak 314 19491 1
------------------------------------------------------------------
State: UT
Wh Miles N
BryanW 328 4012 1
Denarius 332 16000 1
------------------------------------------------------------------
State: VA
Wh Miles N
Bifff67 330 10815 1
DfibRL8R 296 20625 1
scaesare 308 3144 1
Todd Burch 287 16000 1
Treker56 301 4000 1
XK8driver 342 3600 1
------------------------------------------------------------------
State: WA
Wh Miles N
brianman 389 22892 1
BriansTesla 294 1200 1
captain_zap 385 4004 1
ChadS 361 6000 1
deaton52 353 12850 1
dfitz206 335 23935 1
dmckinstry 297 3160 1
EarlyAdopter 399 6882 1
jhs_7645 399 558 1
johngray 391 4879 1
pilotSteve 422 1767 1
SuperCoug 368 1000 1
Tacket 304 6201 1
------------------------------------------------------------------
State: WI
Wh Miles N
glhs272 292 9744 1
rdrcmatt 313 10800 1
------------------------------------------------------------------
State: WY
Wh Miles N
wycolo 293 6659 1

- - - Updated - - -

Good point. It's not just the quantity of folks reporting in, but whether they've had the car long enough that their numbers reflect multiple seasons of driving conditions.

Agreed

 

[FlasherZ]

Here's mine... note that Southern IL != Northern IL (Chicago), which tends to be about 10 degrees colder.

Lifetime: 22507 mi, 366 Wh/mi

7,250 miles ago (~10/15/2013) I replaced the 21" with the 19" tires for winter, and have averaged 371 Wh/mi during that timeframe. On the 21" tires the year before, I netted about 400 Wh/mi, so I'm seeing about a 10% reduction from year 1 to year 2 over the cold season. Part of that, I'm sure, is the fact my wife now drives the car and is better behaved; part of it is the 19" vs. 21" difference; and part of it is that I don't give too many 1 kWh/mi test drives anymore.

 

[David99]

Thinking a bit more, rolling resistance probably isn't affected much by rain. But there could be two other effects. One is just hitting the rain with the car thereby increasing drag, and the other is the tires kicking up lots of water and throwing it behind or under the car. I assume this has been studied?

A quick search brought this up: http://privatenrg.com/RainyRoad.htm#How_about_Rain
He describes each effect in detail and makes energy calculations. Just one quote from the article: "... tires will elevate an astounding 1,675,307 lbs of water an hour on a lightly soaked roadway"

 

[Klaus]

Elevate by how much? That determines the energy spent. (Didn't read the article if it says in there, sorry!)

 

[Jeff Miller]

A quick search brought this up: http://privatenrg.com/RainyRoad.htm#How_about_Rain
He describes each effect in detail and makes energy calculations. Just one quote from the article: "... tires will elevate an astounding 1,675,307 lbs of water an hour on a lightly soaked roadway"

Thanks - that looks like a very interesting and detailed website.