jjeff
Posts: 2149
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: Adjustable EVSE

Tue Oct 06, 2020 4:51 am

alozzy wrote:
Mon Oct 05, 2020 4:33 pm
I know it's not to code, but in retrospect I should have ordered my Zencar EVSE with a 26A setting, rather than the 24A setting, for my 30A circuit.

At 24A, the cable never even gets warm. Also, the 14-30R is right beside the panel, so it's a super short run. I realize 26A exceeds 80% of 30A, but I seldom if ever charge for more than 3 hours continuously, usually for less than 90 minutes.

24A is safer though and provides 87% of the full charging rate, whereas 26A would provide 95% of the full charge rate.

As jjeff mentioned, the actual draw, shown on the Zencar's display, is always a bit under the set point which adds a margin of safety
Truthfully on a good 30a circuit where I know the outlet and the run isn't that far from the panel, I use the 30a setting charging my Leaf, knowing the Leaf will limit the maximum charge rate to 27.5a. Yes this isn't code for continuous use but again I've monitored things and other than the breaker getting a bit warm(not hot) things seem fine. If I had a 60kwh battery that would require charging for many many hours I probably wouldn't charge at 27.5a for an extended period of time if the battery were low but for a brief(~ couple hours) charge I'd be OK with it. Plugging into an outlet not mine for the first time and not knowing anything about it and where I might not have access to the panel I'd probably be satisfied with 24a.
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

1byte
Posts: 7
Joined: Mon Oct 05, 2020 12:10 pm
Delivery Date: 01 Aug 2020
Leaf Number: 301105

Re: Adjustable EVSE

Tue Oct 06, 2020 9:05 am

The adjustable Duosida is my spare that I keep in the car with the 2 adaptors I made, it's not my primary EVSE. Being that it's not my primary I just couldn't justify the added $100 to $150 more for the next step up (Zencar) which does have that 24amp setting which is perfect for 30amp max circuits if usage of such is regular.

While at work I plug into a 14-50R (208v commercial 2 out of 3-phase used) which so far has been it's only use besides testing the other voltages and amp settings at home. And yes I did test it on my TT-30 at home running for 1 hour at the max rate the leaf can pull of 27.5 amps. No issues and heat was verified with an infrared thermometer on feed wires, breaker, & EVSE plug & cord. Same operating temps I see running at 240v 27.5 amp on 40 amp breaker.

Regarding the TT-30 (120v 30amp) option... We are talking emergency on the road oh crap I'm running out of juice because I didn't plan ahead better or non-operational public charging stations. I've owned recreational vehicles for 18 years... 24 amp max continuous is rare in campgrounds... Someone needs to inform the RVIA and associated member recreational vehicle manufactures of this! Our 2011 32ft motorhome is pretty standardly equipped with a 15,000btu HVAC pulling 14 amps (running amps not startup), 6 gallon electric water heater pulling 10 amps (when heating), microwave pulling about 8 amps, DC converter pulling 1-7 amps, fridge pulling 5 amps. Sure not all of those loads run continuously, but you can bet for at least the first couple hours of pulling into a campsite they are on. In Texas your HVAC runs 100% in the summer during the day and so does your fridge, that's 19-20 amps right off the top.

To summarize in all my 18 years of camping in the Texas heat with only a lonely TT-30 outlet for days on end where these are abused public use outlets have I never had to think about how much of a max load I am putting on the wiring and\or plug nor do I suppose does another typical weekend warrior camper whos like myself.

When such an emergency does occur when I find myself needing to plug in to a TT-30 at the max setting the 6.6Kwh leaf charger can take (27.5 amps @ 120 or 240 volts) at a charging rate of only about 12 miles per hour it won't be an issue. Why, because who in their right mind would sit around a campground charging at a rate of only 12 miles per hour for any longer than needed to get them to a DC charger or 6.6Kwh L2 charger?
2017 Leaf - 11bars - 40,000 miles
Central Texas - SOH=77% - Hx=50% - 61.9 AHr
427QC - 647 L1/L2

goldbrick
Posts: 950
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: Adjustable EVSE

Tue Oct 06, 2020 9:30 am

My understanding is that the weak points in most home electrical circuits are the connections. For the old AL wiring, it was the connections that eventually failed. Just because the wire or breaker doesn't get excessively warm doesn't make the circuit safe, IMHO.

Oilpan4
Posts: 1722
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Adjustable EVSE

Wed Oct 07, 2020 1:27 am

The evse is supposed to be ran on a dedicated circuit where the only connections are at the breaker and then andthe receptacle or hard wired to the evse junction box.
"THE ABOVE POST CONTAINS MISLEADING AND INACCURATE INFORMATION. PLEASE CONSIDER IT OPINION, NOT FACT". -someone who I offended and is unable to produce the facts in question.

GetOffYourGas
Posts: 2100
Joined: Tue Dec 20, 2011 6:56 pm
Delivery Date: 09 Mar 2012
Location: Syracuse, NY

Re: Adjustable EVSE

Wed Oct 07, 2020 5:36 am

1byte wrote:
Tue Oct 06, 2020 9:05 am
The adjustable Duosida is my spare that I keep in the car with the 2 adaptors I made, it's not my primary EVSE. Being that it's not my primary I just couldn't justify the added $100 to $150 more for the next step up (Zencar) which does have that 24amp setting which is perfect for 30amp max circuits if usage of such is regular.

While at work I plug into a 14-50R (208v commercial 2 out of 3-phase used) which so far has been it's only use besides testing the other voltages and amp settings at home. And yes I did test it on my TT-30 at home running for 1 hour at the max rate the leaf can pull of 27.5 amps. No issues and heat was verified with an infrared thermometer on feed wires, breaker, & EVSE plug & cord. Same operating temps I see running at 240v 27.5 amp on 40 amp breaker.

Regarding the TT-30 (120v 30amp) option... We are talking emergency on the road oh crap I'm running out of juice because I didn't plan ahead better or non-operational public charging stations. I've owned recreational vehicles for 18 years... 24 amp max continuous is rare in campgrounds... Someone needs to inform the RVIA and associated member recreational vehicle manufactures of this! Our 2011 32ft motorhome is pretty standardly equipped with a 15,000btu HVAC pulling 14 amps (running amps not startup), 6 gallon electric water heater pulling 10 amps (when heating), microwave pulling about 8 amps, DC converter pulling 1-7 amps, fridge pulling 5 amps. Sure not all of those loads run continuously, but you can bet for at least the first couple hours of pulling into a campsite they are on. In Texas your HVAC runs 100% in the summer during the day and so does your fridge, that's 19-20 amps right off the top.

To summarize in all my 18 years of camping in the Texas heat with only a lonely TT-30 outlet for days on end where these are abused public use outlets have I never had to think about how much of a max load I am putting on the wiring and\or plug nor do I suppose does another typical weekend warrior camper whos like myself.

When such an emergency does occur when I find myself needing to plug in to a TT-30 at the max setting the 6.6Kwh leaf charger can take (27.5 amps @ 120 or 240 volts) at a charging rate of only about 12 miles per hour it won't be an issue. Why, because who in their right mind would sit around a campground charging at a rate of only 12 miles per hour for any longer than needed to get them to a DC charger or 6.6Kwh L2 charger?
Over the past couple of years, NY has gradually been adding TT-30 outlets to all of the campsites in the state parks. The downside is that I now have to share campgrounds with more RVs than ever before (and for whatever reason, RV "campers" are incredibly rude and inconsiderate to tent campers, but that's another issue). The upside is that I can charge my EV while I camp.

As much as I have tried, the Bolt EV simply does not accept more than 12A on a 120V circuit. If I could get 24A from that TT-30, it would double my charging speed, allowing more side trips during the days.

Is the above also true with a Leaf? I never tried more than 12A when I had a Leaf. Can a 2020 Leaf, for example, charge at 24A / 120V? Asking more for a friend than myself. He has a 2019 40kWh Leaf, so less range than my Bolt. If he could charge faster while we camped, that could make up the difference.
~Brian

EV Fleet:
2011 Torqeedo Travel 1003 electric outboard on a 22' sailboat
2012 Leaf SV (traded for Bolt)
2015 C-Max Energi (302A package)
2017 Bolt Premier

1byte
Posts: 7
Joined: Mon Oct 05, 2020 12:10 pm
Delivery Date: 01 Aug 2020
Leaf Number: 301105

Re: Adjustable EVSE

Wed Oct 07, 2020 11:03 am

Yes, Leaf's with the 6.6kW charger can charge up to half of the chargers max kilowatt rating if only being feed 120 volts. So, for 120 volts that's 3.3kWs or 27.5 amps. I am not sure about older Leafs that came with the 3.6kW charger, my guess is it would be the same for them with only half the max output when feed 120 volts...15 amps.

I personally would only charge on 120 volts as a last resort and only at the rate required to meet my immediate needs. If charging overnight 24 amp max (if your EVSE has this setting) or 16 amp (most adjustable EVSE's have this setting). If it were me I would leave 27.5 amp charging for time periods I'm able to check on it often to ensure the campsites breaker hasn't tripped. Then at bedtime reduce it down to 16 amp. It's 'free' juice so efficiency of charge wouldn't be of the highest concern of mine.
2017 Leaf - 11bars - 40,000 miles
Central Texas - SOH=77% - Hx=50% - 61.9 AHr
427QC - 647 L1/L2

jjeff
Posts: 2149
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: Adjustable EVSE

Wed Oct 07, 2020 11:47 am

1byte wrote:
Wed Oct 07, 2020 11:03 am
Yes, Leaf's with the 6.6kW charger can charge up to half of the chargers max kilowatt rating if only being feed 120 volts. So, for 120 volts that's 3.3kWs or 27.5 amps. I am not sure about older Leafs that came with the 3.6kW charger, my guess is it would be the same for them with only half the max output when feed 120 volts...15 amps.

I personally would only charge on 120 volts as a last resort and only at the rate required to meet my immediate needs. If charging overnight 24 amp max (if your EVSE has this setting) or 16 amp (most adjustable EVSE's have this setting). If it were me I would leave 27.5 amp charging for time periods I'm able to check on it often to ensure the campsites breaker hasn't tripped. Then at bedtime reduce it down to 16 amp. It's 'free' juice so efficiency of charge wouldn't be of the highest concern of mine.
Yes and no.
My '12 Leaf with the 3.3kw charger maxes out at 15a @ 240v but 12a @ 120v :x
My '13 Leaf with the 6.6kw charger maxes out at 27.5a on either 120 or 240v.
I'm not positive what a modern(post '12) Leaf with the 3.3kw would do on 120v, I'm guessing 12a but it's possible it could do 15a, I just don't know.
I personally like the 27.5a @ 120v option where 240v isn't available, such as 120v only generators or campgrounds with just a single TT-30 outlet.
From what I understand charging at more than 12a?? @ 120v isn't really part of the J1772 standard so I'm guessing the Volt purposely limits 120v charging, not that it couldn't do it. I mean if the wiring is capable of 27.5a @ 240v the same wiring could do 120v no problem.
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

WetEV
Posts: 3991
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Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Adjustable EVSE

Wed Oct 07, 2020 8:03 pm

jjeff wrote:
Wed Oct 07, 2020 11:47 am
From what I understand charging at more than 12a?? @ 120v isn't really part of the J1772 standard so I'm guessing the Volt purposely limits 120v charging, not that it couldn't do it. I mean if the wiring is capable of 27.5a @ 240v the same wiring could do 120v no problem.
Limit is 16 Amps at 120V.

https://en.wikipedia.org/wiki/SAE_J1772#Charging
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

goldbrick
Posts: 950
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: Adjustable EVSE

Thu Oct 08, 2020 10:39 am

Except for

Some EVs have extended J1772 to allow 120 V charging at greater than 16 amps. This is useful, for example, at RV parks where TT-30 ("Travel Trailer" - 120 V, 30 A) receptacles are common. These allow charging at up to 24 amps. However this level of 120 V charging has not been codified into J1772.


https://en.wikipedia.org/wiki/SAE_J1772#Charging

matson
Gold Member
Posts: 4
Joined: Fri Sep 04, 2020 5:50 pm
Leaf Number: 408558

Re: Duosida 32amp adjustable EVSE from eBay

Fri Oct 09, 2020 8:47 am

1byte wrote:
Mon Oct 05, 2020 12:24 pm
I picked up the Duosida 32amp adjustable EVSE from an Ebay seller a month ago for right at $200 (free shipping). It's been great.
Not to make you feel bad, but there's one right now for approximately $160, total including tax and shipping.
location: Soddy Daisy, Tennessee
https://www.ebay.com/itm/Duosida-Level- ... 4470806396

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