rcedwards
Posts: 8
Joined: Sun Nov 08, 2015 10:14 am
Delivery Date: 06 Nov 2015
Location: Edmonds, WA

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Fri Jun 17, 2016 1:16 pm

Thanks. I'll give this a try.

rcedwards
Posts: 8
Joined: Sun Nov 08, 2015 10:14 am
Delivery Date: 06 Nov 2015
Location: Edmonds, WA

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Wed Jun 22, 2016 3:38 pm

A giant thank you for providing these files.

The Blink EVSE is now back up to 30A.

Going from 24A to 30A may not seem like much, but it is noticeable and that's what counts.

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EVDRIVER
Posts: 5875
Joined: Sat Apr 24, 2010 7:51 am

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Wed Jun 22, 2016 10:39 pm

rcedwards wrote:A giant thank you for providing these files.

The Blink EVSE is now back up to 30A.

Going from 24A to 30A may not seem like much, but it is noticeable and that's what counts.



You notice a difference of 3.5A? In a two hour charge that is only about 1.4 kwh.

rcedwards
Posts: 8
Joined: Sun Nov 08, 2015 10:14 am
Delivery Date: 06 Nov 2015
Location: Edmonds, WA

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Fri Jun 24, 2016 12:46 pm

Yes, it is noticeable. Nothing dramatic, but enough for me to do the work necessary to get the other blink up to full capacity.

I realize I'm using a cheesy Harbor Freight clamp on meter, so hold any criticisms of the test equipment. I don't use them enough to warrant a Fluke.

That said, my readings were 24.0A on one and 29.5A on the other. I realize that it should read 27.5A. I will not investigate it further.

Anyhow, going from 24.0A to 29.5A (as the meter reads it) is quite noticeable. 29.5/24.0 = 1.23!

Valdemar
Posts: 2412
Joined: Tue May 10, 2011 10:32 pm
Delivery Date: 09 Sep 2011
Location: Oak Park, CA

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Fri Jun 24, 2016 12:56 pm

rcedwards wrote:Yes, it is noticeable. Nothing dramatic, but enough for me to do the work necessary to get the other blink up to full capacity.

I realize I'm using a cheesy Harbor Freight clamp on meter, so hold any criticisms of the test equipment. I don't use them enough to warrant a Fluke.

That said, my readings were 24.0A on one and 29.5A on the other. I realize that it should read 27.5A. I will not investigate it further.

Anyhow, going from 24.0A to 29.5A (as the meter reads it) is quite noticeable. 29.5/24.0 = 1.23!


I believe 6.6kW is what's actually being sent to the battery, so 29.5A sounds about right considering losses. My 2011 consumes 3.75kW from the wall with its 3.3kW charger.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
-0CB(66.14AHr)@87.5k/54mo (BBB)
59.7AHr, SOH 93%, 118k miles
9kW Solar

GRA
Posts: 7458
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Fri Jun 24, 2016 3:28 pm

Valdemar wrote:I believe 6.6kW is what's actually being sent to the battery, so 29.5A sounds about right considering losses. My 2011 consumes 3.75kW from the wall with its 3.3kW charger.
More like 6.0kW to the battery, 6.6kW from the wall to the OBC.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

Valdemar
Posts: 2412
Joined: Tue May 10, 2011 10:32 pm
Delivery Date: 09 Sep 2011
Location: Oak Park, CA

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Fri Jun 24, 2016 3:41 pm

GRA wrote:
Valdemar wrote:I believe 6.6kW is what's actually being sent to the battery, so 29.5A sounds about right considering losses. My 2011 consumes 3.75kW from the wall with its 3.3kW charger.
More like 6.0kW to the battery, 6.6kW from the wall to the OBC.


Ok, then why a 3.3kW charger draws 3.75kW from the wall? Following this logic it should draw 3.3.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
-0CB(66.14AHr)@87.5k/54mo (BBB)
59.7AHr, SOH 93%, 118k miles
9kW Solar

GRA
Posts: 7458
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Fri Jun 24, 2016 3:52 pm

Valdemar wrote:
GRA wrote:
Valdemar wrote:I believe 6.6kW is what's actually being sent to the battery, so 29.5A sounds about right considering losses. My 2011 consumes 3.75kW from the wall with its 3.3kW charger.
More like 6.0kW to the battery, 6.6kW from the wall to the OBC.


Ok, then why a 3.3kW charger draws 3.75kW from the wall? Following this logic it should draw 3.3.
Because Nissan wanted to compete with the FFE, Fit EV and other BEVs that had true 6.6 kW (to the battery) chargers, they changed the way they described their OBCs, from max current out of the OBC to the battery, to max. current from the wall. The 3.3. kW OBC drew a max. of 3.84kW from the wall (240V x 16A), 3.3 kW to the battery. Nissan essentially pencil-whipped it, to disguise the fact that their OBC didn't have a true 6.6kW output. This was all discussed at length here at the time the 6.0kW (Nissan 6.6 kW) OBCs were introduced in the 2013 model year.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

Valdemar
Posts: 2412
Joined: Tue May 10, 2011 10:32 pm
Delivery Date: 09 Sep 2011
Location: Oak Park, CA

Re: Carcharging/Blink Reduces resedential EVSE's to 24Amp.

Fri Jun 24, 2016 4:36 pm

Thanks for the clarification, somehow I missed all those discussions, probably because had little interest in the 6.6 charger at the time.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
-0CB(66.14AHr)@87.5k/54mo (BBB)
59.7AHr, SOH 93%, 118k miles
9kW Solar

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