Driver8
Posts: 18
Joined: Tue Sep 29, 2020 11:32 am
Delivery Date: 26 Sep 2020
Location: CT

Regen capacity

Sat Nov 21, 2020 8:28 am

So, I understand the four greed dots represent the regen happening when taking you foot of the accelerator or braking. My question is how accurate is that gauge? For example if I'm going down a pretty steep hill and it is already showing four dots of regen (all the way to the left), is there capacity (or "headroom") for more regen, like if I start braking? Is there a limit of how much regen the motor can do? And how accurate is that gauge on your dash?

jjeff
Posts: 2170
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: Regen capacity

Sat Nov 21, 2020 2:32 pm

I believe there is a specific number for the maximum kw's that will go back in the battery with full regen but if say you are going down a very long hill and the battery starts to approach full, the regen will noticeably drop and you'll see less bubbles. This is most noticeable on our Prius(non PHEV) that has a relatively small battery. Even if the battery is fairly low at the top of a long hill, the battery will fill up and I'll have all but zero regen(engine breaking) by the bottom of the hill. As long as you have a larger EV battery and are not near full, I doubt you'd ever fill your battery up(and lose bubbles) by regen, even on a longer hill.
Someone else may know the exact max kw's of regen the Leaf is capable of, I don't.
2012 SL purchased used 2/'16
2013 S w/QC purchased new
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SageBrush
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Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Regen capacity

Sat Nov 21, 2020 3:19 pm

I vaguely remember 60 kW maximum regen, but the max is very battery temp dependent.

I do not know the answers about the bubbles
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
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DougWantsALeaf
Posts: 2185
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Leaf Number: 407811
Location: Chicago North Side

Re: Regen capacity

Sat Nov 21, 2020 3:52 pm

Does anyone know iw the max regen on a Plus? I know on some hard freeway deceleration cycles I have seen it fully it max out the gauge, but not sure what is the cap?
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% SOH) Both Silver
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LeftieBiker
Moderator
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Location: Upstate New York, US

Re: Regen capacity

Sat Nov 21, 2020 4:30 pm

Sometimes my brain tells me things with no footnotes or references. When it does so it is more often than not correct. In this case it is saying "80kw" - although that may be for the Gen I.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
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alozzy
Posts: 1640
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Regen capacity

Sat Nov 21, 2020 4:47 pm

According to the instrumentation of the energy stats of the infotainment center, it maxes out at 25 kW on my 2013 SV.
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Driver8
Posts: 18
Joined: Tue Sep 29, 2020 11:32 am
Delivery Date: 26 Sep 2020
Location: CT

Re: Regen capacity

Sat Nov 21, 2020 4:53 pm

Thanks for all the responses. This is for a 2017 Leaf, so gen 1.
Would I be able to see the regen kW with Leafspy? That might help figure out the dash regen dot question.

I have definitely noticed that when the battery is 100% (or near it) it basically doesn't regen (makes sense) and the "drag" we feel when taking foot of the accelerator is not there. Definitely have to adjust driving style when that happens, as we're so used to the car doing some braking on its own.

jjeff
Posts: 2170
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: Regen capacity

Sat Nov 21, 2020 4:57 pm

I don't currently have Leafspy hooked up but yes I seem to remember it tells you the exact amount of charging or discharging of the traction battery and I also believe the 12v accessory battery along with voltages for both. Someone else is sure to know more.
2012 SL purchased used 2/'16
2013 S w/QC purchased new
Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
Zencar 13, 20, 30a L1/L2 portable EVSE
GE Durastation 30a

LeftieBiker
Moderator
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Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Regen capacity

Sat Nov 21, 2020 7:13 pm

I have definitely noticed that when the battery is 100% (or near it) it basically doesn't regen (makes sense) and the "drag" we feel when taking foot of the accelerator is not there. Definitely have to adjust driving style when that happens, as we're so used to the car doing some braking on its own.
This one of the reasons why it makes so much sense to have a programmable charge limit. It is also why GM calls their original Bolt charge limit "Hilltop Mode" - a lot of people live high up, and drive downhill at the beginning of driving.
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.

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