480 v level 2 chargers

[Frank D]

Looking at multiple projects with 8-15 level 2 chargers, can not find any level 2 chargers with a 480 volt supply and a level 2 output. The only one I found has a 277 volt output.
Any sources anyone?

 

[wwhitney]

A level 2 EVSE needs to provide AC at a voltage that the EV's onboard charger can handle. Not sure many EVs can handle 277V, and I doubt any can handle 480V. I think you'll need to provide a 240V or 208V supply to each EVSE.

Cheers, Wayne

 

[retirede]

Wayne is correct. The J1772 L2 Standard Limits AC voltage to 277. And as far as I know, Tesla is the only vehicle that can use it.

 

[Frank D]

Was looking for level 2 chargers with an “input” 480 volt. Guessing they don’t exist due to the need to step down the voltage would make the unit too big.
When adding 12 chargers to an existing property, 480 is preferable, adding a transformer takes a lot of space for clearance etc.

 

[Elect117]

Level 3 (tesla super chargers or similar) are the only ones. They make some from other countries that are not listed here. It is a pain. Art 625.60 limits the plug receptacle type to 250Vs and there wasn't much of a need to develop anything that can't be installed in homes. Thus we get mostly 2 pole 240V or 208V.

There are some 3ph 208 / 240V chargers.

480V / 277V still require it to be fastened in place.

625 is one of the worst code sections that, in my opinion, hampers innovation.

 

[tortuga]

For a large bank of Level 2 if its going to get its own service or transformer I would use 416/240y.

 

[retirede]

Was looking for level 2 chargers with an “input” 480 volt. Guessing they don’t exist due to the need to step down the voltage would make the unit too big.
When adding 12 chargers to an existing property, 480 is preferable, adding a transformer takes a lot of space for clearance etc.

They don’t exist because with level 2, the “charger” is in the vehicle. What you are calling a charger is “EVSE” which is simply a smart switch that passes line voltage to the vehicle.

 

[hillbilly1]

For a large bank of Level 2 if its going to get its own service or transformer I would use 416/240y.

Would that work with American charge stations and their ground fault detection? Or would European spec stations be needed?

 

[ActionDave]

Would that work with American charge stations and their ground fault detection? Or would European spec stations be needed?

I don't see why it would be any different than supplying 208V wye.

 

[tortuga]

Would that work with American charge stations and their ground fault detection? Or would European spec stations be needed?

Good question, I don't think there is anything in the NEC intentionally limiting Level 2 chargers or anything else to 150V to ground, other than the residential limit and the required receptacles in 210.
There may be technical issues to look at but I think most of the stuff we get anymore is not made just for the US/Canada.

 

[retirede]

Would that work with American charge stations and their ground fault detection? Or would European spec stations be needed?

It should work. J1772 also supports L1 which has one grounded conductor.