alozzy
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Location: Vancouver, BC
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Energy consumption metrics

Sat Oct 20, 2018 11:01 pm

Just curious if anyone has a definitive answer on the energy efficiency calculation discrepancy between the dash metric and the one available in the Zero Emmissions (blue button) LCD infotainment panel on SV/SL trims.

They tend to converge over time, but I have noticed that, after resetting both at the same time, they can show quite different results over the first few days. Don't really care, but it's such an odd thing and a bit of a mystery to me why Nissan chose to have two different displays for what should be the same thing...
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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Nubo
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Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Energy consumption metrics

Sun Oct 21, 2018 2:52 am

Perhaps one or the other is not taking regenerated power into account?
I noticed you're still working with polymers.

LeftieBiker
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Location: Upstate New York, US

Re: Energy consumption metrics

Sun Oct 21, 2018 3:24 am

My guess is that they determined a range of efficiency losses under different conditions, and that the GOM-related estimate is 'optimistic' on those losses, while the Nav estimate is pessimistic in order to give a better, safer range estimate for trips. Using the Nav's more pessimistic range estimator is much more accurate for most people when driving, so I'd say that the efficiency estimate it uses is also more accurate in typical driving.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GerryAZ
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Re: Energy consumption metrics

Sun Oct 21, 2018 9:02 am

If you are referring to the miles(or km)/kWh displays, they should be close. I reset the one in the dash after each charge to give daily efficiency and reset the one on the NAV screen the first charge of each month to give monthly average. They show the same reading at the end of the first day and are usually within 0.2 mi/kWh at the end of each day throughout the month because my usage is consistent.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

alozzy
Posts: 1165
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Energy consumption metrics

Sun Oct 21, 2018 3:14 pm

@GerryAZ Agreed, they provide really similar values and quickly converge, which is why I hesitated to even bother starting this post. I just find it odd that Nissan provided duplication of the same metric, but I guess it was cheaper/easier to keep the existing S trim metric on the dash and then provide a fancier metric of the same thing within the infotainment system on SV and SL trims.

The UI in general is odd, so I guess it's hardly surprising ;)
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

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