kpsleaf
Posts: 2
Joined: Wed Sep 28, 2011 7:42 am
Delivery Date: 28 Sep 2011

Power Consumption Table

Wed Sep 28, 2011 7:52 am

We're currently carrying out a study into the use of the Leaf for a 96 mile commute (48 miles eac way) with a 220V 16 amp charger at each end with a 5.5 hour charging window. The initial studies look.... borderline, however, I can't find any information ref the power consupmtion of the accessories. Is there a spec or doccument available that I can use? We've covered over 1000 miles in 10 days but the weather is good and the batterys are still fresh. Any help / advice would be appreciated.

Thanks

Matt.

thankyouOB
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Leaf Number: 1442
Location: Coastal LA

Re: Power Consumption Table

Wed Sep 28, 2011 7:58 am

that should work for you fine.
i do that every day, but it is a roundtrip.
charging takes about 3-3.5 hours.

accessories depends on what you use and the weather, temp., daylight, etc.
that should be obvious.
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TangoKilo
Posts: 278
Joined: Tue Feb 22, 2011 1:39 pm
Delivery Date: 09 May 2011
Leaf Number: 2212
Location: Moorpark

Re: Power Consumption Table

Wed Sep 28, 2011 8:03 am

Ditto 8-)

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TonyWilliams
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Re: Power Consumption Table

Wed Sep 28, 2011 9:18 am

kpsleaf wrote:We're currently carrying out a study into the use of the Leaf for a 96 mile commute (48 miles eac way) with a 220V 16 amp charger at each end with a 5.5 hour charging window. The initial studies look.... borderline.....


How is this borderline? How fast are you driving?

Obviously, all the accessories are variable, based on YOUR use. The biggest draw is the heater, air conditioning below that, and the rest of the electrical load is not really worth worrying about (radio, navigation, headlights (except maybe high beam, and the "fog" lights).

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davewill
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Location: San Diego, CA, US

Re: Power Consumption Table

Wed Sep 28, 2011 3:17 pm

Easy peasy if you have L2 at both ends...you should be able to use 80% mode if you can keep your speed reasonable.

P.S. if you would share some of your reasoning and your general location, we can help you refine it.
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kpsleaf
Posts: 2
Joined: Wed Sep 28, 2011 7:42 am
Delivery Date: 28 Sep 2011

Re: Power Consumption Table

Thu Sep 29, 2011 1:39 am

Gents,

The fact I have to face is that in the UK, people aren't always receptive to change and that someone will allways try to make something like this fail,and the "ney sayers" are quick to sieze any opportunity.The journey one way appears to drain a lot more power than the return leg, on average figures the 48 mile journey takes 10 bars from 12 in both eco and normal drive modes, and 8 to 9 bars in the other direction. The landscape gently undulates without any really large hills, and certainly no mountains (route located http://maps.google.co.uk/maps?saddr=Immingham+DN40+3LU&daddr=Retford+DN22+0tf&hl=en&ll=53.479874,-0.539703&spn=0.657885,1.229095&sll=53.476935,-0.541745&sspn=0.657936,1.229095&geocode=FV2vMgMdCBv8_ymDSKKQ1ZZ4SDE1DCqpgzSwig%3BFYZqLQMdGQP0_yn_9CLPo1R4SDEyLlvLak2c6A&vpsrc=0&mra=ls&t=h&z=10. About 1/3 of the journey is completed at motorway speeds (70 mph) and the remainder at Road speeds (60 mph). The car has to be able to withstand being driven with the radio, satnav, lights, wipers & heater or AC on (this is Britain after all) and have a 10% remaining margin remaining to allow for possible diversions / traffic jams etc. The vehicle will also be carrying between 1-4 passengers with 50 kg of luggage. As this vehicle is being used for work, in work time, it really must be as close to 100% reliable for the journey as possible as putting others in harms way isn't an option (that and the fact I'll be cursed to oblivion the first time it failed). I wanted the table of power consumptions as I've completed a series of 20+ test runs and need to run some further statistical analysis. As was said, it should breeze it but some of the results were marginal and I need to offer people assurances of the fact and figures nature not just annecdotal.

Can anyone provide the necessary info please?

Thanks

Matt.

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TickTock
Posts: 1701
Joined: Sat Jun 04, 2011 10:30 pm
Delivery Date: 31 May 2011
Leaf Number: 3626
Location: Queen Creek, Arizona
Contact: Website

Re: Power Consumption Table

Thu Sep 29, 2011 6:09 am

kpsleaf wrote:...The fact I have to face is that in the UK, people aren't always receptive to change and that someone will allways try to make something like this fail,and the "ney sayers" are quick to sieze any opportunity...


Oh, we don't have any of those in the US! :-)

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TickTock
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Location: Queen Creek, Arizona
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Re: Power Consumption Table

Thu Sep 29, 2011 6:34 am

I've been logging data on my daily commute (~47 miles round trip). You are welcome to look:

https://docs.google.com/spreadsheet/ccc?key=0An7gtcYL2Oy0dHNwVmRkNkFnaEVOQTVENW5mOTZlb0E&hl=en_US

Each day has three entries: Once in the morning when I leave (trip odometer reset to zero), once when I reach work, and again when I get home. On the trip back, I have a stop where I sit in the car for ~30minutes with the AC on (why the average mph and efficiency is lower on the return). Based on my data, I think your trip is tight at freeway speeds. Reasonable at <50mph. I only recently got Gary's SOC meter so some of the early data is incomplete. I also "top off" the 80% charge for 30 minutes each morning so I am starting with what Nissan would call ~90% charge. Finally I should mention my trip is mostly surface streets (no freeway) with an effective speed limit of 54mph to which I usually set the cruise since traffic is light.

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TonyWilliams
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Re: Power Consumption Table

Thu Sep 29, 2011 10:00 am

kpsleaf wrote:the 48 mile journey takes 10 bars from 12 in both eco and normal drive modes, and 8 to 9 bars in the other direction. The landscape gently undulates without any really large hills, and certainly no mountains


Matt,

I've attached an elevation chart of your route. It doesn't appear to be the reason for your differences in energy usage. We need more information. What is the temperature for both directions? My guess is that is cold in the morning, and you're running the heater, then it's not so cold in the afternoon on the return trip?


Image


About 1/3 of the journey is completed at motorway speeds (70 mph) and the remainder at Road speeds (60 mph).



There is a significant difference in range between 60mph and 70mph. Is there any chance that you could limit the entire trip to 60mph on the morning 48 miles trip? Please see the attached chart:


Image

DoxyLover
Posts: 517
Joined: Fri Jul 15, 2011 9:52 pm
Delivery Date: 16 Oct 2011
Leaf Number: 9214
Location: San Jose, CA

Re: Power Consumption Table

Fri Sep 30, 2011 2:44 pm

TonyWilliams,

What tool/website did you use to generate that elevation chart? That looks very useful.

Thanks,
/Ted
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Reserved, quoted and ordered July 11, 2011
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