Calaveras
Posts: 19
Joined: Tue Jun 01, 2010 5:41 pm
Delivery Date: 26 Jun 2015
Location: Gold country California

Charger timer starts too early

Sat Apr 29, 2017 7:24 pm

I recently bought a used 2016 S
When level 2 the timer is fine, finishes charging when set.
When level 1 charging at home it starts a couple hours early so it is at 100% for hours before I leave.
Any ideas?
2016 S bought used in 2017 with 93% SOH 58 Ah 89 Hx for $12,000
Daily commute is 55 miles round trip with a 2,900 foot elevation climb on the way home.
Calaveras County California

LeftieBiker
Posts: 9213
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Charger timer starts too early

Sat Apr 29, 2017 8:03 pm

They all do that. I think it's because the timer was originally using Japan's 208 volt grid to estimate times, and they never fixed the L-1 estimate for the US market. Maybe they also use less than 120 volts. 110? Anyway, set the timer to finish half an hour after you leave when using L-1 and you'll be fine.

EDIT: Japan uses 100 volts. That explains it.
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.

Calaveras
Posts: 19
Joined: Tue Jun 01, 2010 5:41 pm
Delivery Date: 26 Jun 2015
Location: Gold country California

Re: Charger timer starts too early

Sat Apr 29, 2017 8:13 pm

I set it for two hours later and it was at 98%
2016 S bought used in 2017 with 93% SOH 58 Ah 89 Hx for $12,000
Daily commute is 55 miles round trip with a 2,900 foot elevation climb on the way home.
Calaveras County California

LeftieBiker
Posts: 9213
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Charger timer starts too early

Sat Apr 29, 2017 8:53 pm

Calaveras wrote:I set it for two hours later and it was at 98%


Hmm... you have a 30 kwh pack. The known error is about 60-90 minutes early for the 24kwh pack. I winder if the original, uncorrected error got amplified by being applied to a larger pack...?
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.

Calaveras
Posts: 19
Joined: Tue Jun 01, 2010 5:41 pm
Delivery Date: 26 Jun 2015
Location: Gold country California

Re: Charger timer starts too early

Sun Apr 30, 2017 3:05 am

Actually a 24kw battery. If others are seeing a 90 minute error I am close to that.
I will change the timer another hour forward, because I would like to stop it before 90%.
2016 S bought used in 2017 with 93% SOH 58 Ah 89 Hx for $12,000
Daily commute is 55 miles round trip with a 2,900 foot elevation climb on the way home.
Calaveras County California

baustin
Posts: 644
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: Charger timer starts too early

Sun Apr 30, 2017 5:35 pm

There is nothing wrong with charging to 100%. In fact, it needs done regularly to balance the cells. Sitting for a couples hours at 100% is not a big deal, unless you are in a warmer climate or the car is in a hot garage. I would suggest adjusting the timer so that it finishes about 15 to 30 minutes before departure. It is best for the battery to have it between 25% and 80% while it is sitting idle during the day. If your drive to work does not get it from 100% down to 85% or less, then consider not charging every day.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

cwerdna
Posts: 8085
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Charger timer starts too early

Mon May 01, 2017 1:45 am

Calaveras wrote:Actually a 24kw battery.

Battery capacity is measured in kWh, not "kw".

kW and kWh are very different metrics. It's the same as confusing gallons with horsepower. Think of kW = horsepower, kWh = gallons.

If one charges at 1 kW (or 1000 watts) for 6 hours, 6 kWh came out of the wall. If it's at 6 kW for 1 hour, it's also 6 kWh. If it's 1 watt for 6000 hours, it's also 6 kWh.

One pays for electricity at home in cents per kWh. There are a few utilities w/residential plans where they not only bill per kWh but also have demand charges, but that's rare and complicates calculations. (Demand charges aren't unusual on many commercial plans.)

24 kWh Leaf has ~21 kWh usable battery but since charging isn't 100% efficient, it takes more than 21 kWh out of the wall to fully charge a dead Leaf.

(BTW, 1 hp = ~0.746 kW. And, many .gov sites say 1 gallon of gasoline=33.7 kWh.)

'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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