Economy 7 uses day meter at night

  • EV7's Avatar
    Level 5
    @doverboy It's a dual rate meter and was displaying the two usages until I changed tariff.
    Somehow it's been half configured as a single rate meter but still does the off - peak switching.
    You couldnt make it up 😀
  • EV7's Avatar
    Level 5
    @geoffers it's probably outside this at the moment but the sort of table that I thought would be available is same as the meter when it's working i.e.
    time stamp, date stamp, Day meter reading, night meter reading (there is a sum of day and night too but dont need that).
    Obviously the day meter only changes during 07:30 to 00:30 and the night meter only from 00:30 to 07:30

    Every month they can look at the day meter reading and the night meter reading subtract the value from previous month
    multiply one by 26p the other by 12p and give me the bill just the same as they would with the old mechanical meter.
    Job done.

    That's previous. The meter is now messed up in this half way mode.
    Has anyone else had the same or havent they realised it was possible?
    Last edited by EV7; 2 Days Ago at 17:53.
  • doverboy's Avatar
    Level 8
    @EV7 ... haha I've seen those words "You couldn't make it up" a few times in recent weeks.

    I do monitor things on the Community Forum here and on moneysavingexpert but I don't remember seeing your exact scenario, however I did experience a change to my meter settings made in error which caused my E7 timings to change from 00:00-07:00 07:00-24:00 to 00:30-07:30 07:30-00:30. This happened in November around the time I changed tariff and I didn't notice that it had happened for about 4 weeks ... of course this pushed the first half hour of night rate usage into day rate. I correspond with a senior contributor to the MSE forum and he did experience a couple of occasions early last year when his night rate didn't kick in and he was charged 50 kWh at day rate.

    Let me share my E.ON Next account meter register settings (sent to me by an Energy Specialist) so you can see what I am talking about, I think there is an opportunity for these to have changed to cause your symptoms ...
    Name:  E.ONNext131224off-peakhoursscreen2024-12-1314.06.00.png
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Size:  31.6 KB

    I don't know if it's possible to get a new bill for the time since your tariff change, it would be interesting to see if you are being charged correctly as @geoffers says you should be and it would be interesting to see what codes you have in your supply number, as I mentioned earlier.
  • EV7's Avatar
    Level 5
    Yes it used to have T01 (day) and T02 (night) but since the tariff change no increase in units on the latter.
    I was trying to sort it out before the bill arrives rather than after but it's useful to know I'm not alone.

    It seems likely that it's the meter company that's configured it this way if EoN dont have direct access.
    It has Kaifa written on the meter
    Last edited by EV7; 2 Days Ago at 17:54.
  • EV7's Avatar
    Level 5
    ok I switched back to standard Eon flex with the higher tariffs.
    The Eco7 smart meter is working again and displaying
    time, date, meter sum, day meter, night meter
    @geoffers
    Do you know if the table you showed above includes the day and night meter readings when you have an eco7 smart meter?
    A couple of months ago they said smart system regularly read both readings from the meter.
  • geoffers's Avatar
    Level 38
    ...@geoffers
    Do you know if the table you showed above includes the day and night meter readings when you have an eco7 smart meter?
    @EV7 - afraid I don't know how the eco7 meters work, but my assumption was this (which may or may not be correct)

    • your physical meter itself works by energising different circuits (night storage rads etc), and you previously had 2 separate readings for recording night and day usage
    • however as far as the supplier is concerned for billing purposes, if they can read your ½ hourly energy usage over the whole 24 hour period they can apply the correct tariff rate for the time of use (ToU). If this is the case they don't need to collect 2 register readings from your meter

    My meter is only a single rate meter ie it only holds the daytime tariff rate (this is not used for billing - it's just used for approximate real-time energy usage/costs displayed on the IHD) So what I see from the glowmarkt download is just the ½ hourly kWh values read over the whole day - not split between daytime/night-time usage.

    EOn's billing system just applies relevant tariff rate to the particular ToU readings to produce the night/day costings - I have been doing the same in my spreadsheet to confirm my bills are correct (good news is, they are 😀)

    I haven't seen any other Eco7 users commenting here on their smart meter downloads from Bright/glowmarkt, so maybe if you register you meters with Bright then download the CSV from glowmarkt you will be able to provide the answer for others in the same situation👍
    Last edited by geoffers; 12 Hours Ago at 10:09.
  • EV7's Avatar
    Level 5
    Thanks yes with an eco7 meter (working properly) the day meter reads the day rate and the night meter activates the night circuit and meters the night units. That's as accurate as you can get. If the smart system reads both those it should still bill the right amount for each meter.

    With the half hour samples of one meter the changeover points for different tariffs may not tie up exactly with usage eg if you have an EV with the random up to 30minute delay and eco7 meters perhaps 35 minutes so they all dont turn on at once across the country

    Does the smart system read regularly every half hour for all tariffs for that Bright/glowmark or just a couple of times per day?

    By the way the IHD only reads electric and gas so doesnt show day electric, night electric separately so is nominally useless.
  • geoffers's Avatar
    Level 38
    ....Does the smart system read regularly every half hour for all tariffs for that Bright/glowmark or just a couple of times per day?
    The meter itself is recording the ½ hourly kWh usage, and should store around 13 months worth of readings.

    The data is pulled by the supplier from the meter via the centralised DCC, so they if they wanted they could do this just once a month to produce the bill. However I think they do this once a day - possibly just after midnight - which means they can populate the readings in their app.

    Bright is the same - third party companies like this have special authority from the DCC which allows them to access your meter (when requested by yourself)

    Their app gets updated (via the DCC) sometime after midnight ... though you can force a more recent update later in the day via the app. This isn't instantaneous and doesn't always update, so my assumption is this must send a "poll" request to the DCC which gets queued and hopefully actioned at some time later.
    Last edited by geoffers; 11 Hours Ago at 10:39.