Spacep0d
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Leaf Number: 309151
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How to check outlet power output?

Sun Feb 24, 2019 2:17 am

Hi there,

I have a garage power outlet which was 'upgraded' by an electrician to stop my large air compressor for tripping the breaker. Is there a way to tell what kind of power it's putting out? I suspect it's a regular 120v outlet, but am curious if there's a way to test this myself? Why did one of my outlets work fine for trickle charging, but the other one did not?

I have the optional Nissan EVSE connected to it (came with the optional DCFC connector in a 2018 LEAF) and it seems to be charging at a decent clip. 62-80% in a little over 5 hours. Perhaps this is normal. Opinions welcome!

Thanks!
--
2018 Nissan LEAF S
^My First EV!

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

Re: How to check outlet power output?

Sun Feb 24, 2019 2:51 am

You are a little confused, possibly by a salesperson. The Nissan EVSE that comes with the Tech kit and the SL is dual voltage: 120 and 240 volts, but it isn't for fast charging. Call it 'midlevel charging'. For DC Fast Charge you need a second port on the car, and a rather large, expensive, very high voltage stand alone charger that overrides the car's onboard charger. I suspect that you are charging at 120 volts (standard looking home outlet plug attached to the EVSE, right?). The outlet, if it really was upgraded, should be on a 20 amp 120 volt circuit. That won't affect the charging rate at 120 volts, aka "L-1."
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.

cwerdna
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Re: How to check outlet power output?

Sun Feb 24, 2019 3:02 am

For more clarification, see http://www.mynissanleaf.com/viewtopic.p ... 38#p325438, https://www.clippercreek.com/three-thin ... arge-time/ and planet4ever's diagram at https://web.archive.org/web/20150619074 ... p?p=262630.

Both the stock L1 EVSE and the stock L1/L2 (120 and 240 volt) EVSEs that the Leaf can come with only can do 12 amps * 120 volts = 1,440 watts = 1.44 kW from the wall.

At 1.44 kW, for each hour, 1.44 kWh would've come out of the wall and probably 1.0 to 1.1ish kWh would've gotten added to the battery.

At 120 volts and the way the L1 and L1/L2 EVSEs are set up, I already listed the max station delivery rate: 1.44 kW. To charge faster, you need something with a higher max delivery rate and typically that means charging at 240 volts. If yours came with w/the L1/L2 EVSE, it can output up to 30 amps * 240 volts (240 volts * 30 amps = 7,200 watts = 7.2 kW), but Leaf won't draw that much at 240 volts. It'll draw 6,600 watts (6.6 kW) at max at 240 volts. Thus, the bottleneck here would be the vehicle acceptance rate due to the car's OBC.

A 40 kWh Leaf likely has some user inaccessible capacity at the top and bottom, just like earlier Leafs.

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

LeftieBiker
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Re: How to check outlet power output?

Sun Feb 24, 2019 5:35 am

Reading the first post again, I think he may have meant 'I have the dual input EVSE that comes with the QC option on the Leaf S.' I'm a little preoccupied with preparing for a long term power outage that may occur here when the high, sustained winds arrive in 12 hours or so...
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.

WetEV
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Re: How to check outlet power output?

Sun Feb 24, 2019 9:31 am

cwerdna wrote:A 40 kWh Leaf likely has some user inaccessible capacity at the top and bottom, just like earlier Leafs.
Reports show rated total is 39.46 kWh total, and the usable portion is about 37kWh.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red
2019 eTron Blue

Oilpan4
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Leaf Number: 004270

Re: How to check outlet power output?

Sun Feb 24, 2019 9:37 am

Is it 120 or 240v.

A large home shop compressor uses single phase 240v.
Usually they are on a 40 amp or smalller circuit.
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO
Location: 88103

GerryAZ
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Re: How to check outlet power output?

Sun Feb 24, 2019 1:12 pm

Spacep0d wrote:Hi there,

I have a garage power outlet which was 'upgraded' by an electrician to stop my large air compressor for tripping the breaker. Is there a way to tell what kind of power it's putting out? I suspect it's a regular 120v outlet, but am curious if there's a way to test this myself? Why did one of my outlets work fine for trickle charging, but the other one did not?

I have the optional Nissan EVSE connected to it (came with the optional DCFC connector in a 2018 LEAF) and it seems to be charging at a decent clip. 62-80% in a little over 5 hours. Perhaps this is normal. Opinions welcome!

Thanks!
If the receptacle for your air compressor is a standard configuration like your other garage receptacle, then it should be 120 volts nominal. I suspect your electrician ran larger wire in a new circuit directly from your panel to minimize voltage drop when the compressor starts. 18% gain in SOC from over 5 hours of charging sounds about right for charging at 120 volts. Many garage and outdoor receptacles are fed from GFCI receptacles in bathrooms so the total circuit length is long and that causes excessive voltage drop under load. That is likely why you had trouble with your air compressor and needed a new circuit. Since the charging current is 12 amperes (except when battery is near full charge) when using the 120-volt Nissan EVSE, less energy goes to the battery if the voltage is low and the car may stop charging if the voltage gets too low. Improper ground connections, excessive voltage drop, and heating at the receptacle (due to loose connections) can all cause the car to not charge.
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; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL+ purchased 8/10/2019

jjeff
Posts: 1923
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Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: How to check outlet power output?

Sun Feb 24, 2019 2:20 pm

Spacep0d wrote:Hi there,

I have a garage power outlet which was 'upgraded' by an electrician to stop my large air compressor for tripping the breaker. Is there a way to tell what kind of power it's putting out? I suspect it's a regular 120v outlet, but am curious if there's a way to test this myself? Why did one of my outlets work fine for trickle charging, but the other one did not?

I have the optional Nissan EVSE connected to it (came with the optional DCFC connector in a 2018 LEAF) and it seems to be charging at a decent clip. 62-80% in a little over 5 hours. Perhaps this is normal. Opinions welcome!

Thanks!
Check out this diagram looking at your outlet. 240v outlets look different than 120v outlets and even 120v outlets come in different styles, depending on amperage.
I'm guessing if your outlet is 120v it may be 20a, in which case even if sticking with 120v you could purchase an aftermarket EVSE(around $200) that could give you 16a 120v charging or about 33% faster than you have now. Even if your just going to stick with your OEM 12a 120v EVSE you still might want to consider plugging it into your compressor outlet(just make sure the compressor doesn't start if your car is charging) as that outlet probably has better wiring(probably 12G) which would give you less heat loss than an iffy 15a circuit.
https://en.wikipedia.org/wiki/NEMA_conn ... d_pins.svg
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SageBrush
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Delivery Date: 13 Feb 2017
Location: NM

Re: How to check outlet power output?

Sun Feb 24, 2019 4:19 pm

OP, post photos of your outlet and compressor plug.
Or ask your electrician :D
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

Spacep0d
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Posts: 63
Joined: Wed Feb 13, 2019 6:14 pm
Delivery Date: 14 Feb 2019
Leaf Number: 309151
Location: Santa Clarita, CA
Contact: Website

Re: How to check outlet power output?

Sun Feb 24, 2019 6:21 pm

SageBrush wrote:OP, post photos of your outlet and compressor plug.
Or ask your electrician :D
Wow, thanks for all of the helpful replies. Sorry I sound like such a noob here, but I'm learning!

The outlet is definitely the standard 3-prong outlet you'd see on 120v receptacle, not the 240v 'washing machine' style plug. And, someone mentioned the bathroom connection with GFI or some such...that's exactly right. He had to check the bathroom GFI and upgrade something so the initial run of the large compressor wouldn't either cause the lights to dim or trip the breaker. That's the same outlet I'm using for the trickle charger.

Yes, I'm using the Nissan LEAF EVSE with the adaptor plug for 120v standard outlet. The charge rate is not bad at all. As a test, I let it run (with the timer) and got it to 100% this morning (150 miles range indicated) before driving it off to a meeting. That was the first time I ever saw the car at 100% charge.

So, with level 2 charging, this will use the same amps (12) but give me much faster charging at 6.6 kW? This is much more efficient isn't it? From what I read, I will have more efficiency and cheaper with respect to electricity costs, right?

Thanks!
--
2018 Nissan LEAF S
^My First EV!

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