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johnr
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Re: We need a portable 240v EVSE

Tue Jun 22, 2010 9:48 pm

@garygid: If you manage to make one or post instructions, I for one would be very interested (for experimental use, of course ;) )
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Charging stations, electrical adapters, and portable CHAdeMO quick chargers

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palmermd
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Re: We need a portable 240v EVSE

Tue Jun 22, 2010 9:51 pm

garygid wrote:Presumably the J1772 plug used by AV is only UL listed to 30 amps. If true, not very forward-looking. Perhaps another reason to not buy the AV unit?
That's because the receiver in the vehicle is only rated for 30 amps per UL. Nice of UL to take an 80amp standard and reduce it to 30 amps in the USA.
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AndyH
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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 4:09 am

palmermd wrote:That's because the receiver in the vehicle is only rated for 30 amps per UL. Nice of UL to take an 80amp standard and reduce it to 30 amps in the USA.
30A @ 220V is 6.6kW. In spite of the 80A max rating for the J1772 connectors, I'm not sure the 30A rating for the AV EVSE is really a limiting factor...

Can you please provide a reference to support the apparent 30A UL limit? Thanks!

Andy

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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 7:54 am

Go to http://database.ul.com/cgi-bin/XYV/cgif ... tsrch.html
In the "Category Selection" use "Electric Vehicle Plugs, Receptacles and Couplers".
Click "Search". Seven Results. The Yazaki result (for example) shows the 30A limit. BMW shows a higher limit (60A), but others for L2 also show 30A.
Also, on the http://evsolutions.avinc.com/products/ page (and the Coulomb products page) just about everything is shown with a 30A limit, i.e. conforming to the UL listing.
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Bicster
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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 8:35 am

Everyone who thinks they can future-proof their EVSE is in for a rude surprise.

In spite of standards, things will evolve quickly. My old man always says, "The great thing about standards is that there are so many to choose from."

Just worry about getting the power connections future-proofed. You'll be replacing your EVSE when you get your next EV.
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evnow
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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 9:33 am

30A (continuous) is close to 32A allowed for a 40Amp connection. So I don't see a problem here.

Yes, may be in 2020 we will all get quick charge stations at home that draw down 200A ... until then I'm fine with 30 amps.
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AndyH
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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 9:53 am

LEAFer wrote:Go to http://database.ul.com/cgi-bin/XYV/cgif ... tsrch.html
In the "Category Selection" use "Electric Vehicle Plugs, Receptacles and Couplers".
Click "Search". Seven Results. The Yazaki result (for example) shows the 30A limit. BMW shows a higher limit (60A), but others for L2 also show 30A.
Also, on the http://evsolutions.avinc.com/products/ page (and the Coulomb products page) just about everything is shown with a 30A limit, i.e. conforming to the UL listing.
Thanks. I've not been able to find any UL entries for the current J1772 products. That suggests that the entries in the database might be for the last generation of J1772 hardware.

I've also not been able to cross-reference the part numbers listed in the UL database to confirm or deny what products have the 30A limit. (For example - the Yazaki part numbers.)

I agree completely that the datasheets from AeroVironment, Coulomb, etc. show 30A for their L2 units. It's clear, though, that the connector themselves have to support up to the 80A continuous rating per J1772. The connectors have to be up to the task even if a particular EVSE manufacturer chooses to build an interface with a lower rating.

Back to the 30A, though -- we're talking about 30A into the car, though, and 30A at 220V is still enough to support both a 3.3kW and 6.6kW on-board charger.

Thanks again,
Andy

palmermd
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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 10:18 am

AndyH wrote: Thanks. I've not been able to find any UL entries for the current J1772 products. That suggests that the entries in the database might be for the last generation of J1772 hardware.

I've also not been able to cross-reference the part numbers listed in the UL database to confirm or deny what products have the 30A limit. (For example - the Yazaki part numbers.)

Thanks again,
Andy

UL Subject 2594


Note this is not a quote from the subject, but from a vendor meeting the UL standard.
"Level II 208/240V, 30A charging (via the SAE J1772 connector) and Level I 120V, 16A charging via a standard NEMA 5-20 outlet thereby offering the ability to charge almost any EV"
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AndyH
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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 10:34 am

Rog - from the UL:
UL Subject 2594 covers electric vehicle (EV) supply equipment, rated a maximum of 250 V ac, with a frequency of 60 Hz, and intended to provide power to an electric vehicle with an onboard charging unit. Subject 2594 covers electric vehicle supply equipment intended for use where ventilation is not required. The products covered by Subject 2594 include EV Power Outlets, EV cord sets and EV charging stations, Level 1 & 2. EV cord sets may be designated as portable cord sets or stationary cord sets and may be designated for indoor or outdoor use. EV charging stations may be designated as either movable or permanent charging stations and may be designated for indoor or outdoor use. The products covered by Subject 2594 are intended for use in accordance with the National Electrical Code (NEC), ANSI/NFPA 70.
- I understand that vendors selling current J1772 devices list them as 30A devices
- I understand that there are some devices listed in the UL database
- What I cannot confirm is whether the devices listed in the UL database are current J1772 devices or 'last generation' devices
- Therefore, I can not assume that UL is somehow limiting devices to 30A

I hope that makes sense.

Andy

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DaveEV
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Re: We need a portable 240v EVSE

Wed Jun 23, 2010 12:39 pm

No sense in making/selling 70A capable EVSEs when all the cars in the near future will only take up to 30A. The electronics required to handle double 70A instead of 30A will greatly increase costs.

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