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Something weird is happening

Discussion in 'Tesla Energy' started by Solarpower, Mar 30, 2018.

  1. Solarpower

    Solarpower New Member

    Joined:
    Mar 30, 2018
    Messages:
    1
    Location:
    Germany
    Hey guys,
    I’m having a real problem.
    Here comes some background information first. I’m running 8kW Sunpower Module PV roof with a solaredge SE7k triple inverter. Connected to the inverter is a Modbus for monitoring and solaredge immersion heater controller via zigbee (WiFi).
    A powerwall 2 is connected obviously.

    And here comes my problem. Every time, when there is more than enough energy produced the immersion heater starts but it doesn’t stop anymore when there is no sun.Instead of stopping the powerwall takes over and powers the heater, discharging itself completely.
    What can I do? Either it’s a software problem between inverter and powerwall or the clamps aren’t positioned correctly, that’s what I think. Can someone help me?????
     
  2. arnolddeleon

    arnolddeleon Supporting Member

    Joined:
    Jul 21, 2012
    Messages:
    475
    Location:
    SF Bay Area
    Is the immersion heater load being sensed by the PW as part of the solar? The current system appears to ignore the direction of powerflow from the CTs that are associated with "solar". If there are loads on solar CTs the powerwall inverter seems to turn on and it ends up discharging to offset the "source" which turns out to be load.
     
  3. cwied

    cwied Member

    Joined:
    Jan 13, 2015
    Messages:
    829
    Location:
    San Mateo, CA
    I don't think the issue is with the Powerwall. I suspect it's the immersion heater controller that is assuming that all power coming from inside the house is from solar. Since it sees "excess solar," it stays turned on. Do you know how the solaredge system measures load and production? I think it needs to be set up so the production from the Powerwalls is ignored. There may be a way to move Solaredge's CTs so that the system behaves correctly.
     
  4. solar78

    solar78 New Member

    Joined:
    Sep 30, 2019
    Messages:
    1
    Location:
    Chester
    did anyone find a solution to this? We are experiencing similar (specifically with the solar edge immersion controller and PW2)~
     

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