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How to Calculate Range with elevation

Posted: Mon May 14, 2012 3:55 pm
by mrradon
This winter I noticed that Steven's Pass ski area has (2) Level 2 charing stations. How do I calculate/figure out if the Leaf can make this trip? (about 64 miles one way)
Thrasher's corner, Lynnwood, WA TO Steven's Pass Ski Area

The elevation change is about 4,000'.

Re: How to Calculate Range with elevation

Posted: Mon May 14, 2012 4:08 pm
by UkrainianKozak
It's kind of tricky, and result might vary greatly depending on traffic on highway 2 and how you drive...
The best way is to try...
The good news is, there's more chargers on Highway 2, including fast DC chargers! We should be able to drive to Wenatchee and beyond!

Check out this post: http://www.mynissanleaf.com/viewtopic.p ... 90#p197463" onclick="window.open(this.href);return false;

Re: How to Calculate Range with elevation

Posted: Mon May 14, 2012 4:34 pm
by bigtlb
A best case scenario would be to calculate the change in potential energy, and subtract that from your capacity. This, would of course be assuming 100% efficiency. But would give you a starting point.

If there are several ups and downs, they should probably be calculated separately with the negative downhill delta being multiplied by .80 (or whatever regen efficiency you want to estimate) then summed.

So for 4000' (1220 meters) and a car with a curb weight of 1520 kg (plus a passenger of say 100 kg) this would be.

1220 m * 9.8 (m/s^2) * 1620 kg = 1.94 x 10^7 joules

There are 3.6 x 10^6 joule per kwh, so at least 5.29 kwh must be consumed to lift the car and a 100kg (220lb) passenger 4000'.

Assuming 21 kwh usable this means 1/4 of your range. If you think you can get 100 miles out of 100% charge on flat stretches and at that speed, then do it. Personally I haven't been able to get much better than about 85 miles - so I wouldn't try it without a fall back charge somewhere along the way.

Your mileage may vary. :D :geek:

Re: How to Calculate Range with elevation

Posted: Mon May 14, 2012 4:39 pm
by TonyWilliams
Have you tried the LEAF Energy app foriPhone/iPad from the Apple store ?

http://www.mynissanleaf.com/viewtopic.p ... 93#p101293" onclick="window.open(this.href);return false;

Re: How to Calculate Range with elevation

Posted: Mon May 14, 2012 6:13 pm
by mrradon
TonyWilliams wrote:Have you tried the LEAF Energy app foriPhone/iPad from the Apple store ?

http://www.mynissanleaf.com/viewtopic.p ... 93#p101293" onclick="window.open(this.href);return false;
Awesome link, that was what I was looking for. I saw it somewhere but searches turned up nothing.

I'm still a Luddite, just a cell phone (StarTAC) without any ability to text. I love it that way.

Instead of APPS, how about a google plug in for Google Earth or there Map? Hum...

Re: How to Calculate Range with elevation

Posted: Sat Mar 30, 2019 8:54 am
by Hong
I believe bigtlb's estimate is fairly accurate based on my test:

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The easiest way to remember is: 1% battery consumption for every 100m elevation gain for a Leaf with a 40 KWH battery (e.g. my 2019 Nissan Leaf S).