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Soils Export figures inaccurate

  • 11-11-2023 03:16PM
    #1
    Registered Users, Registered Users 2 Posts: 355 ✭✭


    Hi

    Thanks to a previous answer to a different query, I was pointed to the ESB networks site to download import and export figures for the grid. Based on that for the import I was told to divide the figures by 2. I've now been doing the same for the export figures and on average what the ESB networks figures are giving me, it's approx. 3 times what my Solis app/web is telling me. If the ESB figures are true and that's what will be eventually used for my FIT payment, that's great news. Just wondering is this normal, a known bug in Solis, a mis-config in Solis, or am I going to be disappointed and the Solis is the more accurate.

    Thanks.



Comments

  • Registered Users, Registered Users 2 Posts: 226 ✭✭Wiggy


    In my experience, the Solis and ESBN export data for any month don't show more than a 1% discrepancy



  • Registered Users, Registered Users 2 Posts: 355 ✭✭pad406


    Ok, well first (post install of the panels) bill arrived today and my FIT was 104kWh on it.

    ESBNetworks shows as 103.49 for the billing period (11/10 to 10/11)

    Solis as 28.48

    This is the report from the Solis web, I added the ESB for the days on the right (it only started recording export on 24/10).

    image.png

    Makes sense that my supplier credits me based on the ESB figures for obvious reasons, but if the export figures for the Solis is so far out can I rely on any figures there?



  • Moderators, Home & Garden Moderators Posts: 7,102 Mod ✭✭✭✭graememk


    what is the esb networks site showing on the export graph for the same time period?



  • Registered Users, Registered Users 2 Posts: 355 ✭✭pad406


    Pretty similar to the HDF if I plot that out.

    ESB Site

    image.png

    HDF Plot

    image.png


    Note HDF has no data, either import or export from 19:30 on 25/10 to 10:00 on 28/10.



  • Registered Users, Registered Users 2 Posts: 355 ✭✭pad406


    Just noticed that the 27 & 28 in the sheet above were manual 'guesses' I had entered, there is no data for that



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  • Moderators, Home & Garden Moderators Posts: 7,102 Mod ✭✭✭✭graememk


    really unusual for the solis to be that much out.. any chance of graphs of the solis?

    If the wrong ct was somehow used for the meter, it could throw off the export measurement



  • Registered Users, Registered Users 2 Posts: 355 ✭✭pad406


    This one?

    image.png

    Just noticed now that the Solis is showing

    image.png

    But EDDI shows

    WhatsApp Image 2023-11-15 at 12.43.07_6c68802a.jpg

    I know there's a delay on Solis, but no way is 3.16kWh being used in house at the moment



  • Moderators, Home & Garden Moderators Posts: 7,102 Mod ✭✭✭✭graememk


    The calculation for house use would be

    Use = solar - export - battery charge + battery discharge

    So if it's not seeing the export, it thinks it's house use.

    There's something wrong with the meter (although Keeping the balance will still work fine as it's trying to keep grid at 0 when importing, that's why the battery is charging and discharging fine)



  • Registered Users, Registered Users 2 Posts: 355 ✭✭pad406


    Thanks, I'll get onto the installers and ask them to check it out.



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