Victron MTTP info compared to BMV-712

rhyno
rhyno Member Posts: 393
edited March 2021 in Battery/Electrical & Solar
I installed my BMV-712 and now it shows the Current and Power info but now the MPPT shows zero draw in the Load output section for Current and Power. Is this normal or do I have something miswired?
For reference, the BMV-712 is wired inline between the distribution block and the battery bank's negative pole. B1 is wired to the first battery's positive pole and B2 is wired to the first battery's negative pole. I followed the wiring guidance from the AM Solar doc to wire the midpoint monitoring  cable. 

2021 T@B 400 BD, 2021 Lexus GX 460, Kansas City MO

Comments

  • pthomas745
    pthomas745 Administrator, Moderator Posts: 4,605
    When I turn my battery switch off, with no input power to the battery (shore or solar) my Current and Power read zeros.

    2017 Outback
    Towed by 2014 Touareg TDi
  • rhyno
    rhyno Member Posts: 393
    I am running off battery and the BMV shows me pulling 4A, 120W. MPPT shows load at zero. I am in bulk charging mode so charging appears to be working fine. 
    2021 T@B 400 BD, 2021 Lexus GX 460, Kansas City MO
  • rhyno
    rhyno Member Posts: 393
    edited March 2021
    ... I think I figured it out but would like someone to confirm please.
    It looks like the Load output section of the MPPT is for the monitoring of directly powered devices running straight off the solar panel. If so then that section should read zeros since everything powered in the Tab goes through the battery right? 
    2021 T@B 400 BD, 2021 Lexus GX 460, Kansas City MO
  • pthomas745
    pthomas745 Administrator, Moderator Posts: 4,605
    Oh...the Load section...I missed that.  Yes...unless you have some "small" 12V device wired directly to the Load outputs of the controller, then "Zero" would be normal. 
    2017 Outback
    Towed by 2014 Touareg TDi
  • ChanW
    ChanW Member Posts: 3,165
    edited March 2021
    The "load output" terminals on the mppt are for an indicator light. Offhand I don't remember what the reference is for in the app.

    Edit: not sure that tells you anything about it...
    Here a discussion about it:
    https://community.victronenergy.com/questions/23783/purpose-of-load-output.html

    I have nothing connected to those terminals.

    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya
  • rhyno
    rhyno Member Posts: 393
    Thanks @pthomas745 for the sanity check! 
    2021 T@B 400 BD, 2021 Lexus GX 460, Kansas City MO
  • ChanW
    ChanW Member Posts: 3,165
    Yeah, what @pthomas745 said!  Heh! B)

    In the Victron documentation, they talk about various settings/uses for the Load Output terminals. Here:
    https://www.victronenergy.com/media/pg/MPPT_Solar_Charge_Controllers/en/settings.html#UUID-3324d989-d2a8-cbf5-fdef-ec34e537176f
    Chan  -  near Buffalo NY
    2014 S Maxx
    2011 Tacoma 4cyl ... edit: 2022 Tacoma 6cyl - oh yeah! 

     A_Little_T@b'll_Do_Ya

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