Two chargers versus a single is a significant difference... if the limitation to charge rate is based upon the EVSE design or electrical service limitations.

In my case, I have 50 Amps available to my EVSE location. If my PSeh had two chargers (and two ports of course) I could add another EVSE and cut my charge time in half.

Tesla commands $3600 for twin onboard chargers.

 

Ah, if that is what you mean by two chargers (2 ports). Then I am pretty sure it is just one rated at 7.2. Thought maybe you meant twin 3.6 units internally working in parallel off of one line or something.

However even with a single 7.2 I am cutting my charge time in half. Site says something like 1.3 hours.

 

Dual chargers does not mean two ports on a Tesla. Or on any other car that I'm aware of. It just means the existing port can now handle more current.

 

I barely remember the information from my tilt at buying a Tesla. TBH

I think the chargers (combined) were rated for 80A, so would that not necessitate a plug other than the J1772?

 

You're correct that dual chargers on the Tesla means 80 amps. That's the limit of the J1772 connector, 80 amps, which is 19.2 kW @ 240 volts. For more than that you need a DC connector that bypasses the car's charger like the CHAdeMO connector in the Nissan Leaf or Tesla's proprietary connector.

 

Congratulations!!! You're lucky and happy man)))

 

For some reason, I thought the J1772 was limited to 30A or somewhere around there.


Is your charger handle stamped with a Amperage rating?

 

I'll take a look at the handle tomorrow morning. I know the NEMA 6-50 cable has a tag saying it draws 16 amps, but that's not about the connector, that's about the Porsche EVSE. I still want to say "charger" even though the charging electronics are inside the car, and the EVSE is some sort of regulator controlled by signals from the onboard charger.

 

the car limits the amperage - even if you had a 100amp cable it would only charge at 10amps or so

 

ya thats the thing about buying something the 1st year...

I beleve the cayanne se has an option for a 7.2 charger i assume its built into the car. it would be nice if i could be retrofited to the PSEH as it would cut our charging time in half.


I see something about an aftermarket cable that is rated at 30amps however i think the on car equipment would limit it.

 

I think it is more important to use a 220V charger than a 110V and that will certainly speed up the process by about half or more

 

im aware .. however duel chargers would cut charging time to a little over an hour .. or less

 

It's ~14 hours versus ~2.5 hours when going from 110V to 220V.

 

As I said upthread, the difference is more than you'd expect just from the increased voltage and current. There's an implication that 110v involves energy lost in the charging process as well. I think I saw somewhere a 70% efficiency vs. 90% figure, but I don't have a link handy.

 

I finally got around to doing this.

My handle does indeed have power numbers stamped on it. 250v @ 16 amps for power, and 30v @ 2 amps for control signals. Those are clearly the limits of that particular plastic handle, not inherent limits of the J1772 connector.