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PowerFlows Reversed in App?

Discussion in 'Tesla Energy' started by cookpwr, Aug 25, 2018.

  1. cookpwr

    cookpwr Member

    Jan 21, 2017
    Portola Valley, CA
    System just installed yesterday. My powerflows arent reporting correctly and in fact are reporting solar going into the grid late at night whenever those circuits that aren’t on the powerwall system are on. Here’s my setup and a few examples and pics to help explain.

    1). 2 Powerwall system
    2) Partial Backup (system does not back up tesla hpwc charger, A/C, or pool for example)
    3). 400 amp Main is split to a 200 amp subpanel (not backed up; AC,pool, tesla 100amp hwpc Charger, others)
    4) Powerwall System backs up the 2nd 200 amp subpanel (whole house, garage, various other circuits)

    Here’s the issue: System appears to report correctly for both solar and powerwall and “home” in the app when there is nothing running on the non-backed up sub-panel. However, whenever the AC or pool or tesla Charger turns on (from the subpanel not linked to the powerwall System) a curious reversal happens in the App?

    The Powerwall app begins reporting that the Solar is feeding the grid for the combined output of all sources (home + ac + pool for example). As soon as these non backed up sources stop, the app reports in the correct flow again

    I've verfied what the main meter is actually feeding the grid as well as what the solar inverters are reporting real time

    Pic below is when the Tesla hpwc charger is plugged in (this circuit is not in the power all system or panels but rather on a separate sub panel). This is clearly not right!


    This pic is an accurate representation of what's going on when nothing on the non backed up sub panel is on

    Heres the wonky state. Pic below is immediatly after the the AC turns on vs the pic above when AC off. Notice how it adds about 3.3 kw to the previous state of 7.4 kw of solar generation and then the powerwall app begins reporting that the combined load is now feeding the grid? The main meter proves this not true

    Verifying what the main meter thinks its getting delivered followed by what the power all app is reporting (accurate in this scenario since nothing is on in the non backed up subpanel



    Im hoping this is an easy installer error where one of the circuits is mapped backwards or sensors inside the panel are mapped in reverse?

    Anyone have suggestions or know the solution?

  2. Sylvia Else

    Sylvia Else Member

    May 28, 2018
    Is the A/C three phase? It's entirely possible that one or more current transformers on the other phases have reversed polarity. The installer's web pages accessed on the gateway have the ability to change the polarity, but at this stage, surely the simplest solution is to call the installer back.
  3. miimura

    miimura Active Member

    Aug 21, 2013
    Los Altos, CA
    It is a configuration error. Either the CTs are placed incorrectly or the CTs are configured incorrectly in the Tesla Gateway. The installer needs to come back out and fix it.
    • Like x 1

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