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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 2:35 am 
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Joined: Thu May 09, 2013 4:44 am
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wimbro wrote:
I plan to swing by the Tesla factory service center in Fremont for the UMC and adapters before the dealer. However, obtaining a 70a J1772 plug from TucsonEV or another source prior is not feasible. Does anyone in the bay area have a "spare" 70a plug for sale?


I thought that was the big problem with the UMC splice--finding a spare J1772.


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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 2:43 am 
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Joined: Wed Nov 14, 2012 5:10 am
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Location: Los Altos Hills, CA
One more note for EVians who want to convert a Model S UMC for J-handle. Please note that "some" Tesla made 14-50 adapters were poorly made. If you are the unlucky one who gets one of the poorly made 14-50 adapters, you may be at risk in melting it. Please see: http://www.teslamotorsclub.com/showthre ... lted/page1

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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 2:45 am 
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Location: SF Bay Area, CA
^^^
I stumbled across http://www.teslamotorsclub.com/showthre ... NEMA-14-50 today. Are these the same two parts that are melting?

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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 2:58 am 
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Joined: Mon Jun 17, 2013 7:57 am
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A 70A J1772 plug only can be purchased from TucsonEV for $155 http://tucsonev.com/index.html, but delivery time is my immediate issue.

Waidy - Thanks for the warning on the adapter. Is there a way to test the adapter to determine whether luck will play a role in charging safety and reliability?


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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 3:05 am 
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Location: Los Altos Hills, CA
wimbro wrote:
Is there a way to test the adapter to determine whether luck will play a role in charging safety and reliability?

I am not expert but I used a laser temperature sensor gun to get the temperature reading. My recollection of the temperature readout was 110deg, after 30 minutes of plug-in.

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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 4:30 am 
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Joined: Mon Jun 17, 2013 7:57 am
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I will keep a close eye on the temp while charging. Can I use the Tesla model S UMC with J1772 connector setup to provide safe RAV4 charging at Tesla stations? Or, will the supercharger voltage fry my vehicle? Do you have to be a Tesla club "member" to use their chargers?

Found a CC CS-60 in the bay area which I will be purchasing tomorrow for garage charging. Similar question to the one above, how do higher powered ESVE's affect charging the 40a 10kw unit. Can I use a 50a receptable for the CS-60 if the car is only drawing 40a? Any mods necessary to throttle back from 60a to 40a?


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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 4:57 am 
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Joined: Mon Jun 03, 2013 6:43 am
Posts: 285
Location: Redwood City, CA
wimbro wrote:
Found a CC CS-60 in the bay area which I will be purchasing tomorrow for garage charging.


Where did you find one? I'd like to get one, and a local (Bay Area) pickup would be great. I have looked but have not found one yet for reasonable cost (< $1000).

[quote="wimbro"]Can I use a 50a receptable for the CS-60 if the car is only drawing 40a? Any mods necessary to throttle back from 60a to 40a?[/quote

You SHOULD use a 50A receptacle (and entire circuit including wiring and breaker) if you have a 40A EVSE. The circuit must be rated for higher current than the actual load. The accepted safety factor limits the load on a 50A circuit to 40A. You should hard wire your CS-60 in an 80A circuit to be safe, but you may be able to get away with a 50A circuit if you NEVER charge above 40A (not up to code though).

The car tells the EVSE its max charge rate. FIne to use a 60A EVSE with a 10kW charger (RAV4) or even a Chevy VOlt with a much punier one.

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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 5:11 am 
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Joined: Fri Mar 01, 2013 10:01 pm
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Location: Long Beach, CA
tgreene wrote:
You SHOULD use a 50A receptacle (and entire circuit including wiring and breaker) if you have a 40A EVSE. The circuit must be rated for higher current than the actual load. The accepted safety factor limits the load on a 50A circuit to 40A. You should hard wire your CS-60 in an 80A circuit to be safe, but you may be able to get away with a 50A circuit if you NEVER charge above 40A (not up to code though).

The car tells the EVSE its max charge rate. FIne to use a 60A EVSE with a 10kW charger (RAV4) or even a Chevy VOlt with a much punier one.


The CS-60 only supplies a max of 48A and thus only requires a 60A breaker assuming everything else in the circuit can handle the current.

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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 5:31 am 
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Joined: Fri Mar 01, 2013 7:51 am
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Location: SF Bay Area, CA
wimbro wrote:
Can I use the Tesla model S UMC with J1772 connector setup to provide safe RAV4 charging at Tesla stations? Or, will the supercharger voltage fry my vehicle? Do you have to be a Tesla club "member" to use their chargers?

I think you're a little confused. Tesla uses its own proprietary connector. It's not J1772. Nobody would use the UMC at a Supercharger station anyway.

The Supercharger uses pretty high voltage DC fast charging. J1772 as its implemented on currently shipping EVs only allows for AC charging.

On the Model S, you have to have paid $2K to have Supercharging enabled on the 60 kwh models. It's included on the 85 kwh models.

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 Post subject: Re: Tesla model S UMC with J1772 connector
PostPosted: Thu Jun 20, 2013 6:07 am 
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Joined: Mon Jun 17, 2013 7:57 am
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I very well may be confused...new to the EV technology. My thought was to use the Tesla model S UMC with a modified vehicle side connector swapped to a 70a J1772. The Tesla input plug (connected to charger) remains the same sin use of any adapters. Is it correct that some Model S were built with a single 10kw charger (same as the RAV4)? If that is correct and I use the same UMC designed for the 40a 10kw chargers on the Model S then I could theoretically use the Tesla station chargers. Is my logic inaccurate?


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