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Charging in a non-secure location

Yikes! Someone posted today that a replacement charging cable for a Model S costs $1800. Since my Model S will be charged in a non-secure location (I live in a condo), I'm very concerned about a black-market in stolen charge cables, and mine disappearing one night. Anyone that lives in a condo or apartment, has a carport, or charges at a public charging station could have their charging cable stolen in an instant.

TM - could you please consider imbedding the necessary chip into the cable plug so that it could be paired to the vehicle, just like the fobs are? Without a secondary resale market there will be little incentive for someone to steal one.

Also - has any current Model S owner asked if their auto policy covers the theft of a stolen charging cable? I know some policies exclude thefts of items in unlocked cars, and I assume a charge cable falls into that "unsecured" category.


Extension cords aren't typically rated for continuous use (>3hr). I would imagine if you had a properly sized one, including 25% derating for continuous use, you would be fine. For 110V, if you could get a 20A extension cable you would probably be fine. For 240V, you would probably have to make your own.

A heavy-gauge well constructed extension cord is electrically indistinguishable from in-wall wiring.

A light-gauge or poorly constructed cord will have a higher voltage drop at any given charging current. That voltage drop is converted into heat (voltage drop * charging current = watts of heat) which can be very dangerous if it causes the extension cord to fail. Also, poor quality extension cords may become damaged from foot traffic, weather, etc. compromising the insulation.

Does anybody know what the brick in the mobile power adapter does (other than have green LEDs)? My assumption is that it is a safety device that disconnects the power if the car isn't attached, and it may also contain over-current and ground-fault protection.

If so, then Tesla might also advise against extension cords because the extension attaches upstream of the brick. This would increase the chance of a passer-by coming in contact with a high-power line without these safety features.


The connector is 20' long.

The mobile cable (and HPWC & Supercharger) does lock into the charge port when the car is locked, and thus will not be removable.

However the adapter at the the other end is not locked in place and could be unplugged from the wall and from the mobile cable, even during charging. So you only need to be worried in a black market for adapters. :O

I charge with a J1772 and the adapter. I've noticed that when I disconnect the J1772, the locking mechanism holding the adapter in the charge port unlocks. Unless I pull out the adapter within a few seconds, the lock engages again and the adapter is stuck. Unlocking the doors doesn't release; I have to access the touchscreen to "open the charging port", which once again unlocks the adapter.

The most worrisome thing is that simply disconnecting the J1772 causes the car to unlock the charging port (and adapter), even when you walk up to a locked car without the key fob. Be careful at public charging stations--I'm sure the J1772 adapter isn't cheap.

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