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Do I need the HPWC to use the twin chargers?

efusco

Moderator - Model S & X forums
Mar 29, 2009
5,421
666
Nixa, Missouri, United States
Do I need the HPWC to be able to take advantage of the twin chargers when at a high power charging station? Or, can I use the standard cable?
The HPWC is a home mounted unit. If you're at a high capacity charger (say a 70 amp J1772) there will be a cable and connector there, so if you have the twin chargers you'll be able to take advantage of the additional charge capacity. It won't matter if you have an HPWC at all.
 

Lloyd

Well-Known Member
Jan 12, 2011
6,252
2,039
San Luis Obispo, CA
Do I need the HPWC to be able to take advantage of the twin chargers when at a high power charging station? Or, can I use the standard cable?

The HPWC is a High power EVSE capable of up to 80 amps. There are others that are becoming more prevalent. EVSE's come with their own cable, and you will not be using the mobile connector which plugs into an AC power source, either 120v or 240V. One onboard charger will allow you to use only 40 amps of the High Power EVSE's capability.
 

FlasherZ

Sig Model S + Sig Model X + Model 3 Resv
Jun 21, 2012
7,024
1,013
Another option is to build (or find someone who will build for you) a 75A OpenEVSE.

The "standard cable" that you speak of -- if you're referring to the UMC -- is listed and rated for 50A only (through which only a 40A continuous load may be drawn), and so it has a limit of 10 kW (single charger).
 

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