Lupus
Posts: 19
Joined: Fri Mar 06, 2020 10:49 pm
Delivery Date: 0- 0-2020
Location: Chicago, IL, USA

Passenger/Cargo Weight and Range

Mon Mar 09, 2020 7:00 pm

I know there are easily found guidelines for how fast an ICE car loses mpg per weight added, but is there any guidance on that for a Leaf? I tried searching for it but didn't find anything under "weight" or "fat" (no jokes please).

I occasionally add about 300 lbs in the passenger seat and another 50 in the trunk. How much is that going to kill the range? I myself am not exactly a featherweight, but I'm not too concerned. I would think an additional person makes more difference than me dropping 20 lbs.

I want to plan so I never have to answer why the car didn't go very far with a friend in it as opposed to driving alone.

LeftieBiker
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Location: Upstate New York, US

Re: Passenger/Cargo Weight and Range

Mon Mar 09, 2020 7:26 pm

The basic physics is the same as with an ICE, with one exception: every time you accelerate, the extra weight will cost a little extra energy, but when you slow the car, if you can use mainly regenerative braking, you get back maybe 25 or 30% of that energy. So the overall hit to range can be reduced with careful driving.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
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PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

alozzy
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Re: Passenger/Cargo Weight and Range

Mon Mar 09, 2020 7:30 pm

I'm not an expert, but I suspect some Newtonian physics gets you close enough to an answer...

The force needed (wheel torque) to accelerate the car is equal to the mass of the vehicle (including passengers) times the rate of acceleration. f=ma

Adding 400 lbs of weight to your LEAF will increase the total mass by about 10%. Since most of the pack energy is used for acceleration of the vehicle, then expect a 10% increase in energy use (so a 10% loss of range) while accelerating. When doing regen, you gain some of that back, but Nissan limited regen on the LEAF so not as much as one would hope for.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
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Loving my first BEV :D

alozzy
Posts: 1575
Joined: Fri Jan 20, 2017 4:25 pm
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Contact: Website

Re: Passenger/Cargo Weight and Range

Mon Mar 09, 2020 7:31 pm

Leftie was obviously composing his post at the same time as me, sorry for the duplication - what he said :-)
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

Lupus
Posts: 19
Joined: Fri Mar 06, 2020 10:49 pm
Delivery Date: 0- 0-2020
Location: Chicago, IL, USA

Re: Passenger/Cargo Weight and Range

Mon Mar 09, 2020 7:59 pm

That helps conceptually. I'll post results at some point. Might be helpful to the community at large with enough aggregated data. Hopefully I can get accurate and precise measurements with weight being the variable. Not that I would weigh everyone and everything that goes in my car each time! I'll estimate.

I'm glad it isn't going to cut the range in half or something drastic. I have to admit physics wasn't my best science in school.

LeftieBiker
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Re: Passenger/Cargo Weight and Range

Mon Mar 09, 2020 8:31 pm

If you drive with the pedal floored you'll notice a big difference. The gentler you drive, the smaller the difference.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

gregn
Posts: 113
Joined: Wed Apr 06, 2016 8:29 pm
Delivery Date: 03 Dec 2019
Leaf Number: 302662
Location: Montpelier, VT

Re: Passenger/Cargo Weight and Range

Tue Mar 17, 2020 3:36 am

There is a great trip calculation tool - abetterrouteplanner.com
This lets you pick your car and set numerous parameters for your trip including weight.
The software will then route you through charge points with charge time and travel time estimates.
Put in a common trip you make and play with the parameters. Iv'e tested this on several trips this winter and it is quite accurate.

Greg
2019 Pearl Blue SV Plus w/All Weather 60kW AHr=174.76 SOH=98.9 Hx=97.78 2 QC 10 L1/L2
Lease Upgrade Feb 2020- 4300 miles @ end
2019 Black SV w/All Weather and Tech Packages 40kW
Lease ended Odo 35700 Hx 85%
2016 Leaf SV Pearl Blue

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jlv
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Re: Passenger/Cargo Weight and Range

Tue Mar 17, 2020 8:41 am

gregn wrote:
Tue Mar 17, 2020 3:36 am
There is a great trip calculation tool - abetterrouteplanner.com
ABRP is great. It started Tesla-only and has widened it's scope. If you use it and like it, consider a small donation to the authors.
LEAF '13 SL+Prem (mfg 12/13, leased 4/14, bought 5/17, sold 11/18) 34K mi, AHr 58, SOH 87%
Tesla S 75D (3/17)
Tesla X 100D (12/18)
100K 100% BEV miles since '14
ICE free since '18

powersurge
Posts: 1743
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Passenger/Cargo Weight and Range

Wed Mar 18, 2020 3:00 am

Lupus wrote:
Mon Mar 09, 2020 7:59 pm
That helps conceptually. I'll post results at some point. Might be helpful to the community at large with enough aggregated data. Hopefully I can get accurate and precise measurements with weight being the variable. Not that I would weigh everyone and everything that goes in my car each time! I'll estimate.

I'm glad it isn't going to cut the range in half or something drastic. I have to admit physics wasn't my best science in school.
These concerns are really irrelevant. What does it matter if when you take passengers, you get 5, 10, 15% less mileage?

Doesn't one have more important things to do?

gregn
Posts: 113
Joined: Wed Apr 06, 2016 8:29 pm
Delivery Date: 03 Dec 2019
Leaf Number: 302662
Location: Montpelier, VT

Re: Passenger/Cargo Weight and Range

Wed Mar 18, 2020 3:29 am

jlv wrote:
Tue Mar 17, 2020 8:41 am
gregn wrote:
Tue Mar 17, 2020 3:36 am
There is a great trip calculation tool - abetterrouteplanner.com
ABRP is great. It started Tesla-only and has widened it's scope. If you use it and like it, consider a small donation to the authors.
I had been wondering if donating was possible. I had never scrolled down on their about page. The software is so easy I never needed to look up anything.
There are donate buttons on the bottom of that page. Definitely worth it. A lot of work went into this.
2019 Pearl Blue SV Plus w/All Weather 60kW AHr=174.76 SOH=98.9 Hx=97.78 2 QC 10 L1/L2
Lease Upgrade Feb 2020- 4300 miles @ end
2019 Black SV w/All Weather and Tech Packages 40kW
Lease ended Odo 35700 Hx 85%
2016 Leaf SV Pearl Blue

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