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Huge discrepancy between Solis data and meter reading

  • 08-10-2021 1:15pm
    #1
    Registered Users Posts: 1,296 ✭✭✭ SD_DRACULA


    Got my elec bill for the dates 6/08 - 5/10 and it came in at 249kwh usage.

    I looked at the grid import values on the Soiscloud app for the same dates I get 197kwh import

    I just checked the meter and yes the actual reading does match.

    Now I know the Solis might not be 100% accurate at logging those but 50kwh is a huge amount, I expected a few kwh.

    Anyone else find this? Sounds wrong to me.



Comments

  • Registered Users Posts: 43,746 ✭✭✭✭ 6


    Just checked and mine was:

    Meter imported 160 units

    Solis imported 139 units



  • Moderators, Sports Moderators Posts: 16,074 Mod ✭✭✭✭ slave1


    50 difference over two months, that's less than 1kW a day (just some perspective) for a view via CT clamps estimation



  • Registered Users Posts: 2,725 ✭✭✭ graememk


    Solis cloud only logs every 5 minutes it could miss spikes. Ie kettle etc.

    Also 50 kwh is less that 1 kwh a day.



  • Registered Users Posts: 1,296 ✭✭✭ SD_DRACULA


    Mine logs every 1 min so was expecting higher resolution.

    I also have a ShellyEM that is clamped to my main feed and that came in at around 233kwh imported for the same period, but this does log every 10 secs or so which makes sense that it is more accurate.

    Just wondering if everyone is seeing the same.



  • Registered Users Posts: 791 ✭✭✭ reklamos


    I would not blame Solis here as it is only reporting what the meter is reporting to it. You should have meter in your trip box with a clamp. This reports import/export data to Solis. So it could be that the problem is with the meter. Mine has LCD and I can check usage on it. See if you have something similar.



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  • Registered Users Posts: 1,296 ✭✭✭ SD_DRACULA


    Yes I believe there are two, one standalone meter for total generation and another inside a small consumer unit, will check it out tomorrow but wondering if everyone else is seeing as big a difference between solis data and real data.



  • Registered Users Posts: 19 MATTYON


    Hi,

    Yes I have it as well

    Glad someone else is seeing the same thing,

    I have only newly installed the system (3 weeks) so I am watching it closely at the moment and this is something I noticed.

    Although I expected some difference I didn't expect it to be in this direction e.g Solis app consumption being less than meter consumption. (I hoped it would be the meter reading less than Solis app)

    There is still lots of other stuff I don't understand. Like why is my battery supplying the grid?



  • Registered Users Posts: 180 ✭✭ millb


    Hi,

    I've been checking this with the SMART meter and I notice the Solis CT is reading 1 unit less per day.

    (for 21 days in May the smart meter imported 47 units and the Solis recorded 26 units)

    (for 12 days in June the smart meter imported 31 units while the Solis recorded just 19 units imported)

    The Export is quite close generally a difference of 1 unit per week maybe 5 to 10% eg in May 41 export on SM and 37 on SolisCloud. And 21SM v 19SolisCloud for 12 days of July.



  • Registered Users Posts: 1,296 ✭✭✭ SD_DRACULA


    Yes it's quite annoying, solis reports 0kwh imported for most days for me but I have a shelly em at the CU and it always registers anywhere from 0.1 to 1kwh per day which almost matches my meter.

    Basically the solis is quite stupid/slow at reading spikes in demand, usually kettle, cooker, oven even EV charging from smart charger can offset it.

    Latest firmware doesn't seem to fix anything.

    I call major BS on their advertised 20ms reaction times



  • Registered Users Posts: 1,208 ✭✭✭ Big Lar


    I wonder is it that because the inverter turns off when out of battery or if one has no battery at all installed and hence does not record the usage when the inverter is powered down ?



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  • Registered Users Posts: 1,296 ✭✭✭ SD_DRACULA


    When a battery is connected to the inverter the Solis never power down completely because it needs to monitor the battery and charge it from grid if voltage gets too low so it's not that if a battery is present.

    It's just too slow to react. Shouldn't be rocket science to get right if the €80 shelly CT clamp can read it just fine.



  • Registered Users Posts: 2,789 ✭✭✭ irishchris


    Yep noticed the same myself with the Solis meter grid usage living and the myenergi loving. The myenergi is pretty spot on but Solis way off



  • Registered Users Posts: 191 ✭✭ AnswerIs42


    Came across this thread so checked my own readings.

    My provider is telling me I've used 3100kw this year so far, Solis is telling me I've used 1600kw so there is a big difference over time.



  • Registered Users Posts: 2,176 ✭✭✭ ECO_Mental


    That's a gross error and should not be that big....is your provider using an estimate or is this from actual meter readings.



  • Registered Users Posts: 371 ✭✭ silver_sky


    I'm seeing differences in solis vs smart meter data also. Solis was showing 1kWh for this week and smart meter dashboard about 4kWh in total. Myenergi hub was reading about 5kWh.

    I think perhaps the solis is ignoring anything below a certain amount but the little amounts do add up.



  • Registered Users Posts: 191 ✭✭ AnswerIs42


    I have a smart meter so it's an actual reading.



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