jjeff
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Re: Duosida EVSE Just Arrived.

Fri Mar 24, 2017 6:29 am

webeleafowners wrote:
jjeff wrote:
webeleafowners wrote:I would be curious which EVSE's ignore the J1772 rules. For example, does the duosida ignore do this? How about the units from "EVSE upgrade".

Thanks in advance.

It's my guess that all the L2 EVSEs that also work on 120v ignore the 12a limit. I know all mine do and will happily charge at 120v at all the current settings they will do on 240v. Well I guess except my '13 EVSEupgrade'd EVSE which will do 20a L2 but restricts 120v to 12a :(
Note I'm almost positive the new Juiceboxe's output full amperage on 120v, their old ones do and from looking at their website it looks like the new ones do, I know I personally wouldn't be interested in any EVSE that didn't :)


Well, at least on our smart car, our leads than one year old juice box only charges at 12 amps on 120. Haven't tried the leaf yet.

My guess is, just like the pre '13 Leafs, your car is restricting the 120v charging current, not the EVSE :)
Again my Juicebox that happly charges my '13 Leaf @ 27.5a on 120v only charges 12a with my '12 Leaf with the 3.6kw charger, I believe your Smart car is like my '12 Leaf.
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
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webeleafowners
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Re: Duosida EVSE Just Arrived.

Fri Mar 24, 2017 7:41 am

jjeff wrote:
webeleafowners wrote:
jjeff wrote:It's my guess that all the L2 EVSEs that also work on 120v ignore the 12a limit. I know all mine do and will happily charge at 120v at all the current settings they will do on 240v. Well I guess except my '13 EVSEupgrade'd EVSE which will do 20a L2 but restricts 120v to 12a :(
Note I'm almost positive the new Juiceboxe's output full amperage on 120v, their old ones do and from looking at their website it looks like the new ones do, I know I personally wouldn't be interested in any EVSE that didn't :)


Well, at least on our smart car, our leads than one year old juice box only charges at 12 amps on 120. Haven't tried the leaf yet.

My guess is, just like the pre '13 Leafs, your car is restricting the 120v charging current, not the EVSE :)
Again my Juicebox that happly charges my '13 Leaf @ 27.5a on 120v only charges 12a with my '12 Leaf with the 3.6kw charger, I believe your Smart car is like my '12 Leaf.


Yah. I'm not going to chase it down. Not worth it. When down south with the smart we just charge overnight or at the myriad of public free chargers at the various shopping areas. When up north we just plug it in to the juicebox once or twice a week. I appreciate the input though.

Sorry for all the previous spelling errors. My iphone defaults to Spanish keyboard and spell check and I just don't pay enough attention.
2015 Smart Electric Drive convertible.
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EV only Family...well except for the big diesel motorhome. :shock:

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davewill
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Re: Duosida EVSE Just Arrived.

Fri Mar 24, 2017 11:35 am

Exceeding a standard in this way is not "violating" it. A car that does not wish to accept more than 12a on 120v doesn't have to, and an EVSE that does not wish to offer more than 12a at 120v doesn't have to. It would be violating the standard if the car pulled 24a when the EVSE only offered 12a.

It's the responsibility of the manufacturer to ensure that the cables and J1772 plugs on the EVSE and receptacles on the cars can handle the voltages and amperages they operate at, not the standard.
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GlennD
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Re: Duosida EVSE Just Arrived.

Sun Mar 26, 2017 9:06 am

davewill wrote:Exceeding a standard in this way is not "violating" it. A car that does not wish to accept more than 12a on 120v doesn't have to, and an EVSE that does not wish to offer more than 12a at 120v doesn't have to. It would be violating the standard if the car pulled 24a when the EVSE only offered 12a.

It's the responsibility of the manufacturer to ensure that the cables and J1772 plugs on the EVSE and receptacles on the cars can handle the voltages and amperages they operate at, not the standard.


So far every car I have tested except the Cuda follows the J1772 specification. The Cuda always drew 30A at 240V. They made so few cars that might have been only that car so I do not want to say that all Cuda's are bad.
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TonyWilliams
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Re: Duosida EVSE Just Arrived.

Sun Mar 26, 2017 9:59 am

GlennD wrote:
davewill wrote:Exceeding a standard in this way is not "violating" it. A car that does not wish to accept more than 12a on 120v doesn't have to, and an EVSE that does not wish to offer more than 12a at 120v doesn't have to. It would be violating the standard if the car pulled 24a when the EVSE only offered 12a.

It's the responsibility of the manufacturer to ensure that the cables and J1772 plugs on the EVSE and receptacles on the cars can handle the voltages and amperages they operate at, not the standard.


So far every car I have tested except the Cuda follows the J1772 specification. The Cuda always drew 30A at 240V. They made so few cars that might have been only that car so I do not want to say that all Cuda's are bad.


You know that the LEAF, as well as every Tesla powered car, exceeds 12 or 16 amps on 120 volts?

Sandyjb
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Re: Duosida EVSE Just Arrived.

Sat Apr 01, 2017 12:57 am

Actually ordered one from zencar after finding this thread. Ordered J1772 + 16A evse + 10m + 14-50 plug.
Plugged it into 240V plug today and into both my volt and 500e and both would charge at 120V only. Any insight as to why that would be?

jjeff
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Re: Duosida EVSE Just Arrived.

Sat Apr 01, 2017 5:22 am

Sandyjb wrote:Actually ordered one from zencar after finding this thread. Ordered J1772 + 16A evse + 10m + 14-50 plug.
Plugged it into 240V plug today and into both my volt and 500e and both would charge at 120V only. Any insight as to why that would be?

Wow, 10m! thats over a 30' J1772 cable :shock:
AFA your question, how do you know it's only charging at 120v? If the EVSE is wired correctly you shouldn't even have the capability of charging at 120v(plugging into a 14-50 plug) unless you've made a converter plug. You see with the 240v 14-50 plug you don't even use the neutral pin(which would be required for 120v operation) you only use the two hots and ground. Something doesn't sound right :?
If you have a volt meter I'd measure the voltage to your 14-50 plug, you should get 240v between the two outer blades or 120v between each blade and the center neutral blade or ground(roundish pin). You should get no voltage between the neutral and ground pins.
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

Sandyjb
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Re: Duosida EVSE Just Arrived.

Sat Apr 01, 2017 11:18 am

jjeff wrote:Wow, 10m! thats over a 30' J1772 cable :shock:
AFA your question, how do you know it's only charging at 120v? If the EVSE is wired correctly you shouldn't even have the capability of charging at 120v(plugging into a 14-50 plug) unless you've made a converter plug. You see with the 240v 14-50 plug you don't even use the neutral pin(which would be required for 120v operation) you only use the two hots and ground. Something doesn't sound right :?
If you have a volt meter I'd measure the voltage to your 14-50 plug, you should get 240v between the two outer blades or 120v between each blade and the center neutral blade or ground(roundish pin). You should get no voltage between the neutral and ground pins.


Well the 14-50 was installed (by a electrician) right before connecting the EVSE. Measured the voltage coming out and it was showing 240v (took a pic as well). I can tell its charging at 120 because the Fiat has a display showing what V its charging at. The Volt, I can tell based on time ( showed almost 10 hours) and in the app it shows as portable cord and has auto reduced it to a 8 amp default from 12. No converter plugs in play now. Just a simple 14-50 to 14-50 plug into the 240 receptacle in the wall.

When you say the neutral pin shouldnt be at play, does that mean it shouldnt be wired at all to begin with? There are 4 wires running to the receptacle, 1 ground, 2 hots and im guessing a neutral. Should the neutral not be connected? Appreciate the help and quick reply!

wmcbrine
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Re: Duosida EVSE Just Arrived.

Sat Apr 01, 2017 11:50 am

Sandyjb wrote:
jjeff wrote:When you say the neutral pin shouldnt be at play, does that mean it shouldnt be wired at all to begin with? There are 4 wires running to the receptacle, 1 ground, 2 hots and im guessing a neutral. Should the neutral not be connected?

The neutral should absolutely be connected from the breaker to the outlet, because that's how a 14-50R is done (if you didn't want to run a neutral, you could use a 6-50R instead). But the connection from the plug to the EVSE should use the two hots, and the ground, and usually doesn't need the neutral. From your description, you probably do have only three wires going from the plug into the EVSE, but they're hot, neutral and ground, instead of the correct hot, hot and ground. AFAIK, that's the only way you'd be seeing 120V out of the EVSE.

In short, it sounds like the EVSE is miswired, rather than the outlet.

wmcbrine
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Re: Duosida EVSE Just Arrived.

Sat Apr 01, 2017 12:24 pm

P.S. But just to be sure...

Sandyjb wrote:Well the 14-50 was installed (by a electrician) right before connecting the EVSE. Measured the voltage coming out and it was showing 240v (took a pic as well).


Could you post that picture here?

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