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Thread: Open EVSE with Type 2 connector problem

  1. #1
    Model S R231 EU widodh's Avatar
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    Open EVSE with Type 2 connector problem

    Hi,

    I'm installing my Open EVSE in my shed this evening and I ran into the issue that the Roadster won't start the charge.

    Some pictures of how I installed it can be found on my blog: Widodh Installing the socket of my Open EVSE

    And other can be found here: Index of /ev/tech/charging/open-evse

    Then I plug the Roadster into the Type 2 socket (with my adapter) the EVSE jumps to "EVSE Connected".

    The Roadster on his turn says "Connect Power Cable" and the Ring stays white.

    I connected this:

    - Control Pilot from socket goes to PILOT on the EVSE
    - Proximity Pilot from socket goes to GND on the EVSE

    When the Roadster is connected I measure a voltage of -6.98 ~ -7.00V between the Pilot and GND. I tried to measure the resistance, but that gave me a diode failure message on the Open EVSE LCD.

    What is going wrong here? Is the voltage to low between the Pilot and GND? According to http://code.google.com/p/open-evse/wiki/J1772Basics it should be -12V?

    I'm using the 1.0 firmware without the Advanced Power Supply at the moment, will enable the ADVPWR features later on.

    Could it be that my cable between the socket and EVSE is to long? I'm using CAT6 for this and the cable is about 8 meters (24ft) from the socket to the EVSE. Although the voltage on the socket between Pilot and GND is the same as at the EVSE.

    Some insight on this would be appreciated!
    BMW M5 E39 - Kawasaki Z750R - 3-phase power - Not a Roadster owner, but the co-owner of my/our company is

    85kWh - 19" Cyclone grey - Pearl White - Tech Package - PDC - Sunroof - Twin-Chargers - Light package - Nappa Leather

  2. #2
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    Hi widodh.

    What version of the board do you have? Boards before v7 need r1 changed from 1k ohm to 650 ohm for.compatibility with the Tesla Roadster.

    Chris
    2012 Tesla Model S #01530
    2011 LEAF: Red SL #04122
    EVSE: OpenEVSE, 30A L1/L2 -- http://code.google.com/p/open-evse/
    PV System: 28 x 210W -> 5.8 kW DC

  3. #3
    Model S R231 EU widodh's Avatar
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    Quote Originally Posted by Chris1howell View Post
    Hi widodh.

    What version of the board do you have? Boards before v7 need r1 changed from 1k ohm to 650 ohm for.compatibility with the Tesla Roadster.

    Chris
    I think I have v6?

    http://code.google.com/p/open-evse/wiki/OpenEVSE_boards

    I ordered on June 18th this year:
    - OpenEVSE board
    - Advanced Power Supply

    So I assume that I have v6? Just swapping R1 with a 650ohm should fix it?
    BMW M5 E39 - Kawasaki Z750R - 3-phase power - Not a Roadster owner, but the co-owner of my/our company is

    85kWh - 19" Cyclone grey - Pearl White - Tech Package - PDC - Sunroof - Twin-Chargers - Light package - Nappa Leather

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  5. #5
    Model S R231 EU widodh's Avatar
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    Doh! I should have found that link myself!

    I also found this one: http://code.google.com/p/open-evse/issues/detail?id=2

    I'll try to find a 2.4k resistor in the neighborhood tomorrow and try again.
    Last edited by widodh; 2012-10-11 at 02:51 PM.
    BMW M5 E39 - Kawasaki Z750R - 3-phase power - Not a Roadster owner, but the co-owner of my/our company is

    85kWh - 19" Cyclone grey - Pearl White - Tech Package - PDC - Sunroof - Twin-Chargers - Light package - Nappa Leather

  6. #6
    Model S R231 EU widodh's Avatar
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    I had to order a resistor online since no store here has them.

    I just got my 2.4k resistor and added it to the board on top of R1.

    The Roadster is now charging just fine!
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    Last edited by widodh; 2012-10-18 at 05:24 AM.
    BMW M5 E39 - Kawasaki Z750R - 3-phase power - Not a Roadster owner, but the co-owner of my/our company is

    85kWh - 19" Cyclone grey - Pearl White - Tech Package - PDC - Sunroof - Twin-Chargers - Light package - Nappa Leather

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