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Inner workings of the UMC

Discussion in 'Model S: Battery & Charging' started by Zythryn, Sep 6, 2013.

  1. Zythryn

    Zythryn MS 70D, MX 90D

    Mar 18, 2009
    This thread over at My Nissan Leaf Forum View topic - Tesla Model S has a description of the inner workings of the UMC.
    Described there is the process of disassembling the UMC and some comments on the quality.

    Any engineers or electricians care to share their thoughts?
    I am neither, but to me it looks incredibly solid.
  2. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

    Jun 21, 2012
    There are some thoughts here, especially the last page.
    Tesla Model S UMC cut open and modified to J1772

    My only thoughts:

    * I think we'll continue to see some melting issues, the plug adapter pins should probably be a bit sturdier to avoid bending and making bad contacts.
    * I don't like the parallelled conductors on the vehicle cord; there haven't been issues that I'm aware of here, but if one of the conductors fails, then the other is going to get really hot, really fast. Seems they could have used a #10 instead of 2 #14's.

    Otherwise, it's a pretty damn rugged EVSE for $480 (+$45 adapter).

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