GerryAZ
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Location: Phoenix, AZ

Re: NEMA 14-50 Charge Time?

Sat May 13, 2017 9:50 pm

eyedrop wrote:Is it possible to buy the 20amp EVSE upgrade and charge off a 110v 20amp circuit, setting the EVSE to draw 16 amps? According to my calculations, this would yield 1.9Kw. A nice little boost over standard 12A. Its easy to find 110v 20A circuits at businesses with outdoor outlets...

Its unfortunate the EVSE upgrade has a max of 20A. I wonder if they are working on a 30A version for the future? Is there a portable charging chord capable of 30A? Looks like the best Ill get with 20A is 4.8 Kwh... Which is reasonable. But in the future with higher capacity batteries, these slower L2 chargers would take eternity to charge a battery to full.


In general, EVSE Upgrade sets the maximum rate for 120V to 12A so that it will not overload a 15A circuit. I tried to have them set up the unit from my 2011 for 16A or 20A maximum on 120 volts, but they would not do it even though I was willing to sign whatever waivers they needed stating I understand the risks and limitations. They set up the 2011 unit with their latest internal hardware/firmware at that time (March 2015) so it is adjustable from 6 to 12 amperes on 120 volts and 6 to 20 amperes on 208/240 volts. The cable, J1772 connector, and internal components limit the maximum to 20 amperes continuous. The later units are limited to 16 amperes maximum.

There are other portable EVSEs available that have higher maximum currents. Juicebox, http://www.quickchargepower.com, and others offer units up to 40 amperes for use with 14-50 receptacles.
Last edited by GerryAZ on Sat May 13, 2017 9:54 pm, edited 2 times in total.
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
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Delivery Date: 18 Jan 2017

Re: NEMA 14-50 Charge Time?

Sat May 13, 2017 9:51 pm

To the OP, I found one of your first posts, where you had a screenshot from Leaf Spy. Looks like you have a 2015 S with DCQC, so you have a 6.6 kW charger onboard.

For an inexpensive portable EVSE that will charge your Leaf at full rate, consider this one:

http://www.e-zencar.net/product/evse-32a/

I purchased that one. Price was $285 USD, plus $60 USD for express shipping, plus $15 USD for PayPal fee. Total was $360 USD, shipped to my door. Probably a little less for you, as I'm in Canada so shipping likely more than to US.
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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surfingslovak
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Re: NEMA 14-50 Charge Time?

Sat May 13, 2017 9:58 pm

There is an easy was to do this. When you get the MPGe figures on fueleconomy.gov, you can calculate the number of miles added per hour using this formula: Miles = MPGe x kW / 33.7. For the 2016 LEAF, this means that every kilowatt of sustained power will add 3.4 miles of range per hour.

Looking at the charging log of a 2014 LEAF, it seems to top out at 6.6 kW at 240 Volt, which translates to roughly 22 miles per hour. Since the LEAF seems to top out at a little less than 28 amps, an early EVSEUpgrade will deliver about 42% of this performance, which is roughly 9 miles per hour. A later-date EVSEUpgrade will deliver 57% of this performance or nearly 13 miles per hour.

This assumes the EPA range rating and a wall-to-wheels efficiency that follow their test cycle. If you end up driving more conservatively, you should get better results. Another thing to keep in mind is the great variability in voltage. While residential locations typically see around 240 Volt, commercial locations often have only about 208 Volt. This is a difference of 14% or about 3 miles per hour, all other things being equal.

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RegGuheert
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Re: NEMA 14-50 Charge Time?

Sun May 14, 2017 3:52 am

OT: There's a name I have not seen in a long while! Welcome back, surfingslovak!
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

GerryAZ
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Location: Phoenix, AZ

Re: NEMA 14-50 Charge Time?

Sun May 14, 2017 7:18 am

RegGuheert wrote:OT: There's a name I have not seen in a long while! Welcome back, surfingslovak!


+1
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

jjeff
Posts: 1346
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: NEMA 14-50 Charge Time?

Sun May 14, 2017 3:50 pm

alozzy wrote:To the OP, I found one of your first posts, where you had a screenshot from Leaf Spy. Looks like you have a 2015 S with DCQC, so you have a 6.6 kW charger onboard.

For an inexpensive portable EVSE that will charge your Leaf at full rate, consider this one:

http://www.e-zencar.net/product/evse-32a/

I purchased that one. Price was $285 USD, plus $60 USD for express shipping, plus $15 USD for PayPal fee. Total was $360 USD, shipped to my door. Probably a little less for you, as I'm in Canada so shipping likely more than to US.

I second this suggestion! I have one and it works great. I also have a upgraded EVSEupgrade.com which does 20a @ 240v but only 12a @ 120v, if I had paid the $30?? for an adapter cable I was told I would have been given a code to unlock my EVSE to 16a @ 120v, but I chose to go the Zencar route for higher 120v charging, which goes up to 30a @ 120v.

If you want to charge from a 14-50 outlet and have a 6.6kw Leaf I'd say just get the Zencar and forget the upgrade, it will be much more flexible and cost not much more. For amperage of the Zencar you get to pick 4, I'd suggest 12a, 16, 24a and 32a max. I got only 3 adjustments and went with 13a, 20a and 30a. For short term charging(2hrs or less) on a known quality 20a circuit I use the 20a setting(which is actually 19a) and have never had a problem, both for 120v and 240v circuits. 20a @ 120v is >60%% faster than the OEM 12a Leaf EVSE and jumping to 240v it's 3.3x faster than the OEM EVSE.
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

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surfingslovak
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Re: NEMA 14-50 Charge Time?

Mon May 15, 2017 12:08 am

GerryAZ wrote:
RegGuheert wrote:OT: There's a name I have not seen in a long while! Welcome back, surfingslovak!


+1

Thank you, much appreciated! I miss the early days of this forum - so many good things came out of this community. Saw this Facebook post by a taxi driver in Spain the other day. It prominently shows LeafSpy and all of its glorious stats.

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GlennD
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Re: NEMA 14-50 Charge Time?

Mon May 15, 2017 2:02 pm

The upgrade maximum current depends on the EVSE wire size. For 12A even #14 wire as in the current EVSE's is sufficient. Many older cars had #12 wires and that allows 20A. Really, for L1 12A that is overkill but good for us.

Both my Mercedes B and my eGolf came with EVSEs that had #14 wires. #14 is rated for 15A but you can push it to 16A. I carry an OpenEVSE unit with me that can be switched to more L1 current. On a dedicated 20A circuit it can be set to 16A. If you like to live dangerously it can be set for 20A.

Really, I normally charge at home with L2 at 30A. I sold my previous EVSE with a defective 120V adapter but I never noticed it since I only carried the EVSE for emergency use. It was unused at 120V and I only tested it at 240V.

I had a L6-20 plug on the EVSE and I used a surplus 120V adapter instead of the proper 240V one. EVSE adapters must be labeled as for EVSE only since they are not wired normally.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist

SageBrush
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Re: NEMA 14-50 Charge Time?

Tue May 16, 2017 7:40 am

@surfingslovak,
"Looking at the charging log of a 2014 LEAF, it seems to top out at 6.6 kW at 240 Volt"

That is before the on-board charger. Net is about 6 kW to the battery.
Nothing wrong with your calc, but I find it easier to just multiply the charge rate in kW by my expected miles/kwh to get miles of range per hour.

And by the way, what is this "gallon" you speak of ? :?
2013 Model 'S' with QC & rear-view camera
Bought off-lease Jan 2017 from N. California with 63.9 Ahr after 22k miles
Car is now enjoying an easy life in Colorado

jjeff
Posts: 1346
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Leaf Number: 422121
Location: MSP MN

Re: NEMA 14-50 Charge Time?

Tue May 16, 2017 8:38 am

SageBrush wrote:....And by the way, what is this "gallon" you speak of ? :?

Auh, the gallon. Would that be a US gallon or a imperial gallon(used in Canada and maybe England??) and different sizes, not to be confused with the pint which is also different sizes, depending if your in the US or Canada or possibly England :? And don't forget the Stone, a unit of weight in the English system, but never used in the US :?
Even England, the father of our crazy mixed up system of measurement, no longer bothers with it, instead having moved onto the much superior metric system, leaving the US kind of alone in our choice :(
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

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