danrjones
Posts: 810
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 10:12 am

Dickrett wrote:
Wed Jan 22, 2020 7:06 am
I have a new Leaf s with the temperatures ranging from 5 to 15 , I drove with a full charge 60 miles and had about 20 remaining that's 2 miles per kilowatt-hour that seems like an awfully large reduction using the heater is this normal?
What model are you driving? The 40 kWh? That might be right. You were using full PTC, it was very cold, and were you driving freeway speeds?

My freeway speeds net me around 3.3 miles per kWh. For very cold and running heater / defroster, I would say multiply your normal efficiency by about 65%. So 3.3 times 0.65 = 2.1 miles per kWh.

YMMV
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DougWantsALeaf
Posts: 2361
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 3:51 pm

3.3? How fast are you driving? Are there many hills? Also, you have the smaller tires, which are 5% more efficient than the larger rims.
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

martyscholes
Posts: 51
Joined: Wed Dec 12, 2018 2:40 pm
Delivery Date: 12 Dec 2018
Leaf Number: 303385
Location: Colorado Springs

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 4:02 pm

I have noticed a substantial drop in range when I get into the car cold (e.g. 20 F) in the morning and start a 52-mile commute in my 2019 SL. It seems to be better if I leave it plugged in while I am getting ready and run the remote cabin heater for an hour or two, then start my commute.

danrjones
Posts: 810
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 4:10 pm

DougWantsALeaf wrote:
Wed Jan 22, 2020 3:51 pm
3.3? How fast are you driving? Are there many hills? Also, you have the smaller tires, which are 5% more efficient than the larger rims.
72ish and yes terrain. I do not take long trips except back to the dealer, so limited data points. But my efficiency almost perfectly mirrored ABRP ( A Better Route Planner's) estimates.

But around town, which is most of the time, around 4 right now. Higher in the summer and last Fall.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

radiotron
Posts: 26
Joined: Mon Jan 20, 2020 1:15 pm
Delivery Date: 31 Dec 2019
Leaf Number: 319240

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 5:37 pm

The Leaf is a 2019 S Plus 3 weeks old
I was driving on Normal Roads no Highways or Turnpikes
Between 35-45 MPH depending on the speed limit
Used The Heater For Feet And Defrost Mode at 72 Degrees Low Fan Speed 2 Bars
With Steering Wheel And Seats Turned On it was very cold all day no sun a lot of wind
Typical New England January Raw Day its a good car Better than my 2015 was but
it still had a lot of wind noise from the doors rubber seals so did my older 2015
thats the only comparison between my 2015 S and My 2019 S Plus loud cabin noise
i don't listen to the radio so i notice more than other people would

LeftieBiker
Moderator
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Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 5:53 pm

The resistance heater uses a lot of power whenever it's on, although it can vary the current draw. I suggest you try partial recirculate: with the vents in your usual Feet/Defrost position, activate Recirculate. Once it's lit, press and hold the recirculate button just until it starts to flash, then release it immediately. If you are quick enough it will flash twice and go out. That gives you 70% recirculated and and 30% fresh. It saves heater power without fogging the windshield under normal conditions. If the LCD screen says "Fresh Air" then you need to try again. There is no message to indicate partial (called automatic in the manual) recirculate.
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arnis
Posts: 1027
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 6:29 pm

30% circulation. By default it is ON if you push AUTO.
Push AUTO and just reduce fan speed to 2.
You can try FEET mode only. More heat to feet and windscreen might be ok (fan speed at least 2) because actually
FEET mode has tiny amount of flow for defrost as well ;)

Radiotron, your usage habits are on the good side. HVAC usage should stay within 1000W.
Be sure AC button is not activated if there is no need.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

LeftieBiker
Moderator
Posts: 16165
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: 2019 Leaf S Plus Heater

Wed Jan 22, 2020 7:43 pm

Good catch. 30% recirculated air, then, and 70% fresh.

I was the one who first posted the 'floor-only defrost' trick, so I would have mentioned it above, but 2018+ Leafs let you use recirculate in floor+defrost mode. Pre-'18 Leafs don't.
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.

specialgreen
Posts: 246
Joined: Sun Mar 26, 2017 1:21 pm
Delivery Date: 26 Mar 2017
Location: Minnesota

Re: 2019 Leaf S Plus Heater

Mon Feb 10, 2020 9:41 pm

The reduction in range estimate is just a poor guess using a simple algorithm: if you turn-on the heater, the LEAF reduces estimated range by the same percent whether it is 40F outside or -10F outside; and whether you have been driving on the freeway or city streets; and whether the fan speed is set to 1 bar or 5 bars. Basically, somebody at Nissan said "if the driver turns on the heater, reduce range estimate by 15%." It's pretty meaningless because it doesn't count any factor except whether the heater is on or off.

If you're driving on the freeway at 70mph, consuming 20kw to move the car down the road, then spending 2kw heating only reduces range by 10%. On the other hand, if your entire commute is in stop-and-go traffic on city streets averaging 25mph, then you may have 50% range reduction. Similarly, if it's -10F out, then heating will consume much more power than if it's 40F out, but the range estimate won't reflect that.

If you're driving in the city, you can probably ignore the range estimate (because you'll charge at home overnight and the range doesn't matter). If you're doing a drive out of town, then you have to do your own calculation.

arnis
Posts: 1027
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: 2019 Leaf S Plus Heater

Tue Feb 11, 2020 4:51 pm

I agree.
It takes into account external temperature, that's all.
Running fan at 2 bars is more-or-less economical.
PTC Heater (no heat pump capability) draws 1-2kW.
That is 1-2kWh every hour of driving.
so 3 hours is 3-6kWh. Out of 40 or 60 kWh battery.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

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