justoneman
Posts: 99
Joined: Sun Apr 09, 2017 6:09 pm

Re: Duosida EVSE

Thu May 11, 2017 10:03 am

PV1 wrote:The i-MiEV tends to stay about .5 amps below the pilot signal (if EVSE signals 12 amps, the car pulls 11.5). Even with that, the car maxes out at 14 amps, so it wouldn't trip the breaker immediately (although it should after about an hour as that is higher than the 80% de-rate).

5 bars in 4 hours sounds right for 120 volt charging at 12 amps. That's the rate mine charges at.

My unit is charging 5 bars in less than 4 hours. Tonight I will photo my gauge and clock when I start charging and then 3 hours later.

PV1
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Re: Duosida EVSE

Thu May 11, 2017 11:42 am

That's still within normal expectations. We may see that bars/hour will increase as the packs degrade. For example, my 2nd car (Koorz) can recover bars faster than Bear (my primary car), although it isn't actually charging any faster. It's just that each bar represents less energy. Bear got a new battery in 2015, so that pack can store more energy than the one in Koorz.

Also, as you pointed out, there is a charge range that each bar represents, and this can sometimes trick you into thinking the car is charging faster or slower initially than it should.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015
"Photon" - 2017 Bolt EV LT in Orange with QC - 7/31/2017

Solar-powered since 10/10/2013

justoneman
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Re: Duosida EVSE

Thu May 11, 2017 11:56 am

PV1 wrote:That's still within normal expectations. We may see that bars/hour will increase as the packs degrade. For example, my 2nd car (Koorz) can recover bars faster than Bear (my primary car), although it isn't actually charging any faster. It's just that each bar represents less energy. Bear got a new battery in 2015, so that pack can store more energy than the one in Koorz.

Also, as you pointed out, there is a charge range that each bar represents, and this can sometimes trick you into thinking the car is charging faster or slower initially than it should.

Yes I was thinking this very same thing. Both about the bars being misleading because one does not know what % of a bar is charged or discharged. I was also thinking about the batter degradation and certainly on a 2012 there must be some of that. The thing is I have a 58 mile round trip commute that I can make on one charge if there are not big problems along the way. Bear in mind that about 30 minutes of that round trip I am traveling at highway speed over 60 mph. My batteries must be pretty close to original.

thomash85715
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Re: Duosida EVSE

Thu May 11, 2017 12:13 pm

When you say, PV1, that "yours" pulls 12A, is it a duosida or some other aftermarket evse? What I have yet to see thus far is quantified evidence of duosida amp rate on both levels it claims to be capable of. I am about to pull trigger on buying one with a 10-30 240v dryer plug on it but am lacking confidence it will actually work as advertised. That was my reason for coming on here and asking if anyone was using one. The pilot square wave duty cycle generated inside the EVSE determines the amps level the charger inside the car will draw. We know the duty cycle in factory EVSE is set for 8A. The duosida behavior and methodology surrounding this pilot signal are all still too vaguely defined for me to take a $220 bath. That is only reason I am asking for numbers from a Kill A Watt or similar device.
In an insane society a sane man would appear insane.
Acquired 2012 silver ES April 2017.

PV1
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Re: Duosida EVSE

Thu May 11, 2017 12:39 pm

Sorry. 12 amps is what I get from my EVSEUpgrade unit.

If the EVSE has a 15 amp plug on it, then by code (rule of 80% de-rate for extended loads) it's only allowed to draw 12 amps. If it has a 20 amp plug, then it can draw 16 amps. However, for raw data on this particular unit, I can't answer, as all I have for charging are two MiEV cords and an Eaton Pow-R-Station.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015
"Photon" - 2017 Bolt EV LT in Orange with QC - 7/31/2017

Solar-powered since 10/10/2013

thomash85715
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Re: Duosida EVSE

Thu May 11, 2017 1:39 pm

This helps a lot. Just to repeat and rephrase so I know I got this: The people who affix the AC plug be it a 15a or 20a are required by code agreement to set the square wave duty cycle down 20% from the max for that type of plug. Thus a 15A plug dictates a 12A duty cycle wave and a EVSE with a 20A plug should set itself to 16A. I presume your i-MiEV factory EVSEs are unmodified and draw 8A. The eaton device I presume you speak of is a level 2 240V dedicated unit. From it, does your i-MiEV draw its full 3.3kw? That is something slightly under 16A per line I speculate. This Duosida is no Eaton power unit by any stretch. Just wondering if the people that make the duosida are complying with all the rules we have here. Assuming the eaton people do.
In an insane society a sane man would appear insane.
Acquired 2012 silver ES April 2017.

justoneman
Posts: 99
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Re: Duosida EVSE

Thu May 11, 2017 2:08 pm

thomash85715 wrote:This helps a lot. Just to repeat and rephrase so I know I got this: The people who affix the AC plug be it a 15a or 20a are required by code agreement to set the square wave duty cycle down 20% from the max for that type of plug. Thus a 15A plug dictates a 12A duty cycle wave and a EVSE with a 20A plug should set itself to 16A. I presume your i-MiEV factory EVSEs are unmodified and draw 8A. The eaton device I presume you speak of is a level 2 240V dedicated unit. From it, does your i-MiEV draw its full 3.3kw? That is something slightly under 16A per line I speculate. This Duosida is no Eaton power unit by any stretch. Just wondering if the people that make the duosida are complying with all the rules we have here. Assuming the eaton people do.


Were this true, I would be blowing my 15 amp circuit breaker, since I have one with a 20amp plug on it.

Don
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Re: Duosida EVSE

Thu May 11, 2017 2:22 pm

justoneman wrote:Were this true, I would be blowing my 15 amp circuit breaker, since I have one with a 20amp plug on it.
Not if you're charging an iMiEV - Our cars won't trip a 15 amp breaker on either 120 or 240 volts

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE Premium, Raspberry Metallic
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon
2006 Itasca Navion Sprinter Motor Home

justoneman
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Re: Duosida EVSE

Thu May 11, 2017 7:12 pm

Don wrote:
justoneman wrote:Were this true, I would be blowing my 15 amp circuit breaker, since I have one with a 20amp plug on it.
Not if you're charging an iMiEV - Our cars won't trip a 15 amp breaker on either 120 or 240 volts

Don
So then you know how many amps its drawing?

justoneman
Posts: 99
Joined: Sun Apr 09, 2017 6:09 pm

Re: Duosida EVSE

Thu May 11, 2017 7:26 pm

6:04 pm when I got home from work this evening.


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