Long Term Nissan LEAF Mileage/Usage Review: Once Around The Sun

4 years ago by Mark Larsen 33

The Author With His LEAF In Utah

The Author With His LEAF In Utah

I am delighted to announce that today marks one year since taking delivery of my Leaf. Happy Anniversary, Ohm My!I have never thought of myself as very materialistic, but I have to confess that I truly, madly, deeply love this EV! It is by far the best car I have ever owned: clean, quiet, comfortable, inexpensive, responsive, powerful, smooth, solid, reliable, convenient, cutting-edge… downright fun to drive. Indeed, it is sooooo enjoyable that I catch myself looking for excuses to run errands, just so I can spend more time behind the wheel.

Even then, it is not as though my daily driving around this desert community has chalked up a lot of miles. You can see the total mileage for this first year by clicking on these readouts from CarWings:

2012 Results (click to enlarge)

2012 Results (click to enlarge)

2013 Results (click to enlarge)

2013 Results (click to enlarge)

Here are the tallies when added together:

8,232.2 miles with 1,513.2 kW used = 5.4 Miles-per-kWh

Other Leaf owners will undoubtedly notice that my average efficiency is the extremely high exception to the rule. The EPA claims that my 2012 model should use 34 kWh to drive 100 miles, i.e., 2.94 miles-per-kWh. Yet to date my 5.4 average translates to only 18.52 kWh per 100 miles! Since the EPA also states that 33.7 kWh of electricity has the same amount of energy as in one gallon of gasoline, this means that my miles-per-gallon equivalent this past year has been:

8,232.2 miles / (1,513.2 kWh / 33.7 per gallon = 44.9 gallons) = 183 MPGe

Can’t beat that!

Except… I can beat that: the even better news is that those kWh came from my solar array, which means that I drove all those miles with truly zero emissions! Coincidentally, I just received my latest utility bill with the final solar reading for this past year taken six days ago. Those utility stats show that my panels produced 924 more kWh than I used to power both my home and Leaf since taking delivery. (As a side note, I will grumble that, unlike in other states, our utility, Rocky Mountain Power, simply zeroes out the yearly total in March without compensating customers for any excess energy “donated” to its grid —a policy that I am adamantly urging our Utah legislators to change.) But getting back to driving on sunshine, here is how my kWh have stacked up for the first year with my Leaf:

kWh Usage Over First Year Of LEAF Ownership

kWh Usage Over First Year Of LEAF Ownership

As the graph clearly shows, the bright blue slice of the pie is 924 kWh larger than the grey and green slices combined. Below are the stats for the miles driven on the kWh in the green slice:

usage 1

Tsk, tsk. Given my miles-per-kWh average, I could have driven nearly 5,000 miles farther with the extra electrons I “donated” to Rocky Mountain Power this past year. I guess I am just going to have to invent even more errands to run in my Leaf next year. Oh… please don’t throw me in that briar patch…!

Of course, one of the key questions that passersby always ask me about my Leaf is the cost to charge it. More often than not, they also want to voice the old, worn-out “long tailpipe” accusation against EVs. Using the above miles and kWh for my Leaf, the current prices in my area, and EPA data, I have calculated the following comparisons of the fuel costs and greenhouse gases:

ghg math

As you can see, if I didn’t have solar panels, and had charged my Leaf from the grid instead, the GHG to generate the electricity at the power plant would have been only about 15% of the amount from my Subaru’s tailpipe and upstream sources, and would have cost less that 1/10th the price of gasoline.

That savings in fuel costs helps lessen the pain in my back pocket for being an early EV adopter. After all, I did pay a hefty price for my Leaf SL last year: the full MSRP of $37,250. Because of other deductions in 2012, my taxable income did not qualify for the entire $7,500 federal incentive, but my pending refund nonetheless lowers the cost to $31,333. Utah also offers incentives for clean fuel vehicles: a whopping $2,500 for CNG cars, but only a paltry $605 for EVs. Still, that will bring the price down further to $30,728.

If I had waited a year, I could now buy an SL model for $34,840, in which case those same incentives would lower the price to $28,318 —a $2,410 savings. Even after subtracting what it would have cost for gasoline to drive my Subaru, I still paid $918 more to drive my Leaf this past year instead of waiting to buy a 2013 model. Was it worth it? Absolutely, in my humble opinion. I have been naïvely contributing to the pollution on this planet for many decades, and consider that a bargain “fine” for my negligence. Besides, I predict that by next year the fuel savings will have eliminated the price difference entirely. Moreover, it ultimately boils down to a matter of principle. Is it worth paying more to help clean up the planet, transition to renewable, domestic sources of energy, and build a better world for future generations? As the old adage says: you get what you pay for.

In case you are wondering, I should clarify that the reason the total miles and kWh in my utility stats are less than in the CarWings readouts up at the top is because of the six days that have transpired since the last reading. Nonetheless, you can see that my average 5.4 miles-per-kWh remains the same. I would love to claim that such extreme efficiency is because I am a world-class hypermiler, but… in truth it probably has more to do with the environment than the driver.

Another caveat I should state is that my odometer mileage likewise differs from the CarWings data. Below is a photo of what the display showed yesterday before plugging in for the night:

Day 365 Of Ownership

Day 365 Of Ownership

I can only guess at the reasons for the discrepancy. The default explanation would be that I have neglected to touch the “OK” button to authorize data transmission to CarWings each and every time I started the car. However, that possibility could not account for the 300 missing miles in CarWings. There were only a couple of times when I failed to select that icon during the first few weeks of ownership, and even in those instances I immediately remedied the error after driving only a block or two. Since then, authorizing CarWings has become so automatic that it is now second nature to reach for the console screen after pushing the start button.

I suspect that a better explanation is that the odometer tallies its miles according to wheel rotation, but CarWings instead relies upon GPS mapping. Which one of those methods is more accurate, I couldn’t really say for certain, but it seems likely that tire pressure, weather, elevation changes, wider or narrower turns, road surfaces and conditions could render an odometer more prone to variability. A satellite, conversely, uses fixed longitude and latitude coordinates to calculate the distance along a given route on the earth’s surface. I suppose that such discrepancies are simply an oddity for drivers with GPS systems to shrug off. Why, even yesterday, as also shown above, the trip odometer clocked 31.1 miles, yet CarWings reports that I drove 30.4. Go figure:


CarWings Data

I am curious to see what the second year of ownership will bring. In a few more weeks, when the daytime temperatures are again in the mid-70s to mid-80s, I plan to do a second quick-and-dirty capacity test to verify if the condition of my battery pack still conforms to the polynomial curve calculated from Nissan’s published benchmarks. And after another summer of blistering heat, I’ll be most interested in seeing if the dire predictions for my capacity bars from the AZ contingent prove prophetic. Of course, by then I suspect that Nissan will have issued the anticipated software upgrade to make the instrumentation more accurate and reliable —which might render the kerfuffle a moot point.

Speaking of that software upgrade, I have already noticed on the CarWings web page that a new set of instructions has appeared for its settings in the vehicle. The upgrade will apparently include a second menu item which my version of the software does not have, as show in the screen dump on the left below:

Freedom From The Daily Disclaimer Button?

Freedom From The Daily Disclaimer Button? (click to enlarge)


Apparently, touching that button will open the display on the right above, which allows one to authorize CarWings to automatically transmit data over a 30-day period. As I stated above, touching “OK” every time I start the car doesn’t really bother me, but I know that there are some owners who deem the constant request infuriating. They will undoubtedly welcome this change with a sigh of relief and joy. At any rate, it makes me wonder what other “easter eggs” are in the pending upgrade: perchance the “percentage of charge” readout and the “80% charge now” option via the speedometer display, like in the 2013 models…? Hope so!

In the interim… Ohm My… what EVentures lie ahead!

Editor’s Note:  Like what you read?  Mark’s also has an EV-advocacy site you can check out here as well.

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33 responses to "Long Term Nissan LEAF Mileage/Usage Review: Once Around The Sun"

  1. Nicely done Mark! EV+PV is a great combo. I’ve been driving on sunshine for over three years now. Can’t beat it!

  2. Delta says:

    There was a pop song about ‘walking on sunshine’. Well you’re ‘driving on sunshine -and don’t it feel good!

  3. Future Leaf Driver says:

    Hi Mark, thanks for the great report on your experiences with the LEAF. That must be great charging with sunshine and never having to stop for gas. I checked out our site, great resource for EV info, bookmarked!!!!

    Looks like “Tisa” is riding around in style!!!! 😉

  4. Future Leaf Driver says:

    Hi Mark, thanks for the great report on your experiences with the LEAF. That must be great charging with sunshine and never having to stop for gas. I checked out your site, great resource for EV info, bookmarked!!!!

    Looks like “Tisa” is riding around in style!!!! 😉

    1. Hi, “Future”:

      Thanks! I take it you must have a Leaf on order…? Hope you take delivery soon! Yeah, ‘Tisa adores riding in the LEAF. Her window is constantly mucky with drool from sniffing the odors that we pass, her mouth open and tongue lolling in ecstacy.


  5. Mark H says:

    Great report Mark and great title. PV-EV is the ultimate driving experience. I am in my second PV-EV year as well. Here is to a least 24 more more trips around the sun represented by the common solar warranty!

  6. evnow says:

    The electricity used that Carwings shows doesn’t account for the charger inefficiency. You probably used 15% more electricity.

    Good average, BTW. My efficiency gets killed in winter 😉

    1. Yes, that’s true: there are always efficiency losses from the wall to the pack. Still, the kWh put into and taken out of the grid in the pie chart are from Rocky Mountain Power’s statements. Ergo, if I apply that 15% to the EVSE, it merely expands the EVSE slice to 1,720 kWh, and shrinks the home slice at night to 7,115 kWh. Since that is still 924 kWh less than my array generated, let’s just call it a wash. Either way, gotta drive more!

      1. evnow says:

        Actually, the 15% loss is for the charger (which is in the Leaf). Nissan should report that – but they don’t.

  7. MrEnergyCzar says:

    I do the same but am about even with my Volt and using the surplus solar… planned it that way…


  8. John Hollenberg says:

    A very good article, only marred by the reference to battery degradation at the end. It may interest you to know that the temperature profile of your area closely matches Fresno, CA. The Battery Aging Model makes the following predictions for remaining battery capacity for your Leaf based on your annual mileage and excellent miles per kwh:

    1 year – 91.70
    2 years – 88.50
    3 years – 85.92
    4 years – 83.67
    5 years – 81.62
    6 years – 79.71
    7 years – 77.92
    8 years – 76.22
    9 years – 74.58
    10 years – 73.01

    Note that the model is based on unpublished data from Nissan from a reliable source on mynissanleaf.com. Due to your low annual mileage, outstanding efficiency and climate only modestly above the Los Angeles Civic Center reference the model predicts you will do very well (as will I), far from the “dire predictions for my capacity bars from the AZ contingent”. However, this doesn’t mean folks in Phoenix who drive 15,000 miles a year are doing well.

    1. Hi, John:

      Yes, I am well aware of the model that forum members at MyNissanLeaf.com have postulated to predict capacity loss according to different climates.

      I’m sure that you are likewise aware that I opine that the very few capacity losses in Phoenix that prematurely fell below the polynomial curve of Nissan’s published parameters were due to other factors than just heat. If so, at least for now, I tend to take said model with a grain-of-salt. We’ll just have to wait and see how accurate its predictions prove over time.

      I am curious, however, that the model would postulate that the temperature profile for my area closely matches that of Fresno, CA. I can tell you that last summer we had 129 days over 90°F, 47 of which were over 100°F. I had no idea that Fresno was that hot. Wowza…!


    2. George B says:

      Let it go, John, Mark has proven time and time again that he is a fan of fiction, not fact. That said, I find his self-indulgent narcissism even more annoying than his ignorance. I can understand that not everyone is an engineer, but that does not excuse the type of behavior and language he has consistently used to discredit others, and to draw attention to himself. You would expect more from long-time EV advocates and PIA members.

      1. Holy Inquisition, George. Niiiiice!

        Well… I can only surmise that you also judge Nissan a “fan of fiction, not fact,” since so far the automaker’s assessment seems to echo my own. Indeed, as you know, Nissan claims to be so confident of its battery to now offer a warranty to repair or replace it for premature capacity loss despite normal care.

        Again… we’ll just have to wait and see how the battery capacity issue plays out with time and miles. It might be that Nissan will lose its shirt with that warranty… and I will end up eating a generous helping of crow. If so, it sure sounds like you’ll be overjoyed to personally hand me the plate.

        1. Stoaty says:

          Nissan set the bar low enough with the battery capacity warranty that they probably won’t have to pay a lot. A Leaf would have to dip below 70% (or might actually be triggered at a bit lower, since the granularity of the capacity bars is quite coarse) at 5 years in order to qualify. The Battery Aging Model predicts that a Leaf driven 12,500 miles a year and never parked in the sun will hit 68.9% capacity in Phoenix. Since the average annual mileage in Phoenix was apparently less, Nissan has made a calculation that they won’t have to pony up very often. That doesn’t change the fact that the batteries degrade a lot faster in Phoenix than in cooler climates, and that Phoenix Leafs are predicted to have about 50% capacity at 10 years rather than the over 70% I will probably have. It also doesn’t change the fact that Nissan has never publicly admitted that places as hot as Phoenix are not a good choice for anything other than a short lease. It was only through the reports in Phoenix and the efforts of a number of people on mynissanleaf that it became clear that battery capacity degrades much more rapidly in the first 12-18 months than people had been led to believe (by omission).

          All that said, the Leaf is working out very well for me.

          1. We’ll undoubtedly see with time and miles if the model’s projections prove more accurate than Nissan’s. Got my napkin ready!

            And I’m glad that the LEAF is working out well for you.

            1. Stoaty says:

              The model is based on (and very closely matches) Nissan’s projections from one of their engineers who gave the data to TickTock on the MNL forum. It’s just a way of quantifying how different environments and usage patterns affect battery longevity:


              Note that the model successfully predicted the low battery capacity loss for TaylorSFGuy who lives in Washington state (very cool climate), but has put over 60,000 miles on his Leaf.

              1. Yes, I know that the projections that TickTock reports are a reconstruction of what he recalls an engineer told him when reviewing the analysis of his LEAF at Casa Grande. I’m not sure that means the automaker “officially” endorses those data, however. Especially since Andy Palmer stated a 76% projection for Phoenix after 5 years (instead of TickTock’s 65.5%). That’d be a good question for the LEAF Consumer Advisory Board to ask him.

                Please don’t misunderstand me: it is not as if I dismiss the model entirely. I deem it a reasonable hypothesis, extrapolated from laboratory measurements that may or may not apply to the real world. Time will tell.

                My only real concern with the model is that the projections are based solely on climate differences. I suspect that other factors beyond “normal” care –100% charging, multiple charges per day, aggressive driving, high speeds, excessive use of climate control, frequent QuickCharges, etc.– might prove even more detrimental to battery capacity, especially in hotter climates.

                1. Stoaty says:

                  Yes, but their 76% was based on average Phoenix usage rather than the same 12,500 mile a year standard. I would agree that other factors are likely to be of some significance, particularly aggressive driving (which is partially accounted for in the miles per kwh in the spreadsheet, so heat is not the only factor in the spreadsheet, and there is also a factor for solar loading while parking in the sun). However, the data is pretty clear that heat is the main determinant for a population of people who drive with the usual spread of habits.

                2. George B says:

                  The effective ambient temperature at the place of residence has about 70% correlation to battery degradation. None of the other factors come close to this level of correlation.

                  There is a paper presented by NEC at a technical conference, which shows the climatic impact on lifecycle projections for the battery clearly.


                  It’s also worth pointing out that, the aging model is based on Arrhenius law, which is mentioned in the paper also. This law allows us to predict relative outcomes in different locales. Assuming that all the other factors are being equal. This approach predicts about three time faster loss of capacity in Phoenix when compared to Seattle.

                  That said, we are likely wasting time with Mark here again. He is apparently only interested in what the the owner’s manual says, even though its language has been considerably dumbed down, and it lack crucial details. Remember, it’s not about facts, it’s about proving Nissan right and “repairing a modicum of damage”.

                3. Stoaty says:

                  For the study that George referenced above, it is interesting to note that the predicted length of time until 70% or 50% remaining capacity was 3 times as long for one city in Japan as another city. That certainly fits with the factor of 2.66 that the battery aging model found for loss of capacity in Phoenix vs. Seattle.

      2. darelldd says:

        I’ll just have to assume that George is making a knee-slappingly-funny April Fool’s joke. I haven’t found anybody more devoted to LEAF fact than Mark.

        1. George B says:

          Darell, I would certainly hope so. Perhaps the comments Mark has directed at the affected LEAF owners in Phoenix were all in jest also?

          There is no doubt in my mind that he has done a lot of distinguished work for the EV cause. While the kudos are well deserved, aren’t we forgetting the drivers in the process? EVs are finally getting adopted in greater numbers, which is undoubtedly a good thing. Given this context, some of the owners could encounter legitimate problems.

          This is all new technology to the world of mass car manufacturing. Why not shift some of the focus from pure EV advocacy towards other goals? Sometimes, both automakers and newly minted EV owners could use some help. Unbiased words of wisdom from prominent EV advocates can make a lot of difference.

          What happened in this case was the exact opposite. A number of LEAF owners were deeply upset by the commentary and opinion Mark offered on his blog, and on MNL.


          I have been trying to work with him and politely explain some of the technicalities. Although I respect his opinion, he continues to harp the same tunes, even if it’s completely unnecessary. This article is a good example of that. There was absolutely no need to take a jab at LEAF owners in Phoenix, and insinuate once again that it’s all just instrument error.

          There is a capacity warranty now, which was a good move by Nissan. Can’t we all just move on?

  9. IndyFlick says:

    Well done Mark! I slightly undersized my array. The first year I owed SDG&E $38 and the second year I owed them $75. That’s for the LEAF and the house for a year and also includes our NG! I like to tell people I can produce my own electricity, but I can’t produce my own gasoline.

  10. IndyFlick says:

    Mark, you say “my taxable income did not qualify for the entire $7,500 federal incentive”. Do you have an IRA? You can always move money out of an IRA to create a taxable event and then use the EV tax credit to cover it. The result is having tax free cash in a savings account. If you’re under 59 1/2 you move it into a Roth IRA. It sits in that account tax free until you reach 59 1/2.

  11. Ed Marek says:

    “Another caveat I should state is that my odometer mileage likewise differs from the CarWings data…

    I can only guess at the reasons for the discrepancy…

    CarWings instead relies upon GPS mapping…

    yesterday, as also shown above, the trip odometer clocked 31.1 miles, yet CarWings reports that I drove 30.4. Go figure:…”

    I believe you have guessed wrong, Mark.

    CW uses tire rotation to calculate miles driven just as the dash odometer does, but it has an odometer error (with stock wheels and tires) of ~2..5% in all 2011. 2012 , and (perhaps) 2013 LEAFs, as was shown (less accurately, due to the low miles driven sample) in your 31.1/30.4 mile report results above.

    This also explains the same ~2.5% error (assuming your LEAF displays it) in your LEAF’s dash m/kWh (which uses the ~2.5 % under-reported Carwings miles) in relation to the navigation ( which uses the dash odometer miles) screen m/kWh report.

    Please take a look at the MNL thread below, to confirm whether you LEAF is in fact SNAFU, and for a discussion of how this can improve your understanding of LEAF kWh use reports:

    “Here are my suggestions, for you and other CW users.

    All 2011-2 LEAFs, AFAIK, have reported the same CarWings odometer and Dash m/kWh error of consistently under-reporting by ~2.5%.

    So if your CW miles driven is ~2.5% lower than your dash odometer miles, and your dash m/kWh is showing ~2.5% less than your nav screen m/kWh (0.1 m/kWh lower below ~6 m/kWh, and 0.2 m/kWh lower when you are getting over ~6 m/kWh) this is “normal” for 2011-2012 LEAFs.

    Hopefully, Nissan has fixed this error in the 2013s. Any readers have a CW equipped 2013? Please check and report back.

    If you are “missing” more miles than this, go to the “rate simulation” page at the CW site.

    Here, each “trip” (each start/stop cycle) will be individually reported. Make sure that each of the “trips”you have made each day, is showing up. Each trip will show the same ~2.5% under-report of miles driven as your daily total, and each m/kWh report there will match your dash (if you reset it) for the corresponding trip, again showing the same ~2.5% under-report error.

    The Dash, nav screen and CW m/kWh all are mathematically “correct” as a function of the total kWh use reported by CW for every trip, day, or months driving.

    It’s just that the dash uses the same ~2.5% understated miles to make its calculation of m/kWh as CW does, while the nav screen is always accurate as a function of reported kWh use, as it uses the dash odometer miles, for the m/kWh calculation.

    Got it?

    BTW, while every LEAF driver, AFAIK, has reported the dash odometer as very close to correct, while using stock tires and wheels, IMO it wouldn’t hurt to confirm your dash odometer is correct, by checking with another source, such as Google maps.

    Now back to the “rate simulation” page, If you are missing any “trips”, that you made on any given day, and every driver is pushing “accept” every time, please report back.

    I have missed only a couple of “trips” in the ~12,000 miles since I’ve been using Carwings (since an update corrected errors in the early LEAFs) so I believe they probably have all been due to operator error on my part, as I make a very quick stab at the screen, and I think I probably just missed “accept” a couple of times.”


    1. Hi, Ed:

      VERY informative! If I understand correctly, the LEAF’s odometer and CarWings use different formulas, with different distances, for wheel rotation. Huh! It sure sounds like Nissan’s left hand doesn’t know what its right hand is doing in this instance. One would think they would enter the same measurement for both. If for nothing else, it would then produce even better efficiency for the vehicle. For example, if I used my higher odometer mileage for the year, instead of CarWings’ tally, my averages would be… 5.6 miles-per-kWh and 190 MPGe. It makes me wonder which of the two formulas is more accurate.

      By the way, the discrepancy in my two totals seems greater than ~2.5%. The odometer is 3.53% higher than CarWings, and CarWings is 3.65% lower than the odometer. Perhaps that difference really is due to forgetting to push the OK button…?

      I sure hope that the 2013 software now uses the same formula for both odometer and CarWings. Maybe that will be another “easter egg” in the upgrade for earlier models as well. Hope so!

      THANKS for your input, Ed. I learn something new every day.


      1. Ed Marek says:

        Your welcome, Mark, and thank you for the article.

        ”By the way, the discrepancy in my two totals seems greater than ~2.5%. The odometer is 3.53% higher than CarWings, and CarWings is 3.65% lower than the odometer. Perhaps that difference really is due to forgetting to push the OK button…?”

        Very likely, IMO.

        As I mentioned earlier, the way to check is looking at the CW daily total of miles driven, or:

        “…If you are “missing” more miles than this, go to the “rate simulation” page at the CW site.

        Here, each “trip” (each start/stop cycle) will be individually reported. Make sure that each of the “trips” you have made each day, is showing up. Each trip will show the same ~2.5% under-report of miles driven as your daily total, and each m/kWh report there will match your dash (if you reset it) for the corresponding trip, again showing the same ~2.5% under-report error…”

        If you find that all those reports show close to a common value like ~2.5% (or maybe ~2.4%, as some others have suggested, IIRC) then it must be user error, or maybe CW is occasionally missing the “accept” signal.

        “…I sure hope that the 2013 software now uses the same formula for both odometer and CarWings. Maybe that will be another “easter egg” in the upgrade for earlier models as well. Hope so!..”

        This would of course be a very simple fix…assuming Nissan wants it fixed.

        I filed a complaint with Nissan ~18 months ago about this ~2.5% odometer and dash m/kWh discrepancy. I was told Nissan engineering was aware of it, but had no immediate plans for an update to correct the error.

        Not only have they done nothing to fix it for 2011-12 LEAF owners, the few reports I have seen from 2013 LEAF owners all indicate that this error is still there, both on the dash m/kWh and on CW odometer the dash uses.

        So, while I have a lot of good things to say about my LEAF, Nissan’s (apparent) policy of obstructing LEAF drivers access to consistent and accurate reports of either miles driven or their kWh use (perhaps-see the MNL thread I posted above) is something I am far less impressed by.

  12. Ed Marek says:


    I should have started my long comment above with the more important conclusion, on which we agree.

    After (almost) two “trips around the Sun”, I also have found that my 2011 LEAF:

    “… is by far the best car I have ever owned: clean, quiet, comfortable, inexpensive, responsive, powerful, smooth, solid, reliable, convenient, cutting-edge… downright fun to drive…”

  13. GeorgeS says:

    Great article Mark. Sorry I missed it. Kayenta is a beautiful place. My wife April has her work at 873 Art Gallery. You should go check it out.. She was featured artist in Sept.

  14. Linda Nicholes says:

    As a long-time EV driver who totally powers her transportation with “gallons of sunshine” from the solar array on my residential roof, I absolutely applaud and validate Mark’s enthusiasm and well-laid out EV + PV facts. I personally have literally not made a stop at the gas station for over ten years. Also conspicuously missing from my life are the hefty utility bills from the 20th Century. (Literally!)

    “The California Public Utilities Commission estimates that the state is generating 1,255 megawatts of electricity from 122,516 rooftops. (At peak output, that’s the equivalent energy production of a big nuclear power plant.)” http://www.forbes.com/sites/toddwoody/2012/07/03/how-california-is-democratizing-solar-for-the-99/

  15. Mark, if you’re feeling civic minded, you could set up a public charge station at your place to use up the excess electricity. I’m thinking of doing that at my place in England – I imagine so long as it’s free there are few legal complications.


  16. Mark,

    Excellent article. I have 6Kw of solar on my roof and just purchased a Leaf. I won’t be generating nearly the power due to the cloudy days, however I do generate enough for the
    vehicle and offset my house considerably. In the future I will likely add more solar as our power company actually pays a premium for solar power over and above usage. As for the discrepancy between the car’s miles per kilowatt vs carwings, many GPS receivers ignore the elevation calculations when figuring distance (and speed). You are correct in that tire rotation and inflation can make odometer readings inaccurate. Using a handheld GPS on a level surface should allow you to figure how far off (or not) your speedometer is. I know on my new Leaf, the police speed warning radar is right on with the speedometer.