Meter times, GMT/BST, and rate1/rate4/rateT

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    Hi – our old meter had three readings. Day rate was the normal, more expensive rate. Heat rate was the cheaper amount to power water and heaters. Night rate – the 5 hours overnight on E10 was for all electrical use, not just heaters and water so this was separated out.

    One question I have – I contacted Co-op yesterday who told me they don’t offer economy 10 tariffs…. ?

    Thanks for your hard work with this!!


    EDF times and tariff are confirmed as follows for anyone interested;
    Midnight to 05:00; 13:00-16:00; 20:00-22:00 GMT []
    Peak rate (all other times)

    Summer times are apparently one hour later i.e. 1am till 6am; 2pm till 5pm and 9pm till 11…
    This is a “Standard Variable Tariff” and is all that EDF claim to do for E10 users…

    Really pleased to have found this website – looking at solar panels so every variable and option counts…


    Please make absolutely sure thay you know the Economy 10 times being used by your meter. They differ in some parts of the company. Treat any times given to you by your supplier with scepticism, especially if it’s SSE, who either don’t know or give you a meter for the wrong area and the wrong times. If necessary, hang around at changeover times to make absolutely certain that the meter is switching tariffs at the correct time. My meter goes click and a number changes on the display from 1 to 2 or back again.

    As an example, here are the times operating in North Shropshire, which are definitely not the same as elsewhere:
    All year
    4:30am – 7:30am
    1:00pm – 4:00pm
    8:30pm – 00:30am

    I recommend the ‘Meter Readings’ iPhone/iPad app by Graham Haley for keeping track of peak and off-peak usage and costs over time. I now have five years’ worth of readings and it’s a helpful graphical check on how disciplined you are being at using off-peak and whether your supplier is raising prices faster than they ought. The way SSE made mistakes, raised prices and generally messed me around was carefully recorded and eventually persuaded me to move to OVO – but only after I had found this website that confirmed for me that it was actually possible. The graphs of my costs per month are now plummeting since I have moved, especially the off-peak one.


    In the South West EDF provide metering and the hours are 00:00-05:00 then 13:00-16:00 then 20:00-22:00 on “cheap” if anyone is interested.

    NB these times are GMT and BST shifts this by 1hour


    Hi Mark!
    First of all – thanks for this website!
    I decided to write as I’m really confused about Economy 10 tariff. I’m on E10 with Eon.
    As I’m at home from Christmas, I started to take readings from my meter every day at the beginning and the end of my off peak tariff, which is between 1:30pm-4:00pm. The other two off peak tariffs are 10:00pm-12:30am and 2:30am – 7:30am so difficult to monitor. I’ve got 3 readings: 1-night / off peak, 2-day/standard and 3-stored heat.
    I emailed Eon asking which reading should increase when I use for example dishwasher and washing machine between 1:30 pm and 4:00 pm.
    My readings during that time was:
    1:30 pm – 1- 4594 ; 2-27709 ; 3-28526
    (washing machine and dishwasher on)
    4:00 pm – 1-4594 ; 2-27713 ; 3-28529
    As you can see stored heat (3) increased which is ok, but I’m suprised that also my standard rate increased taking this should be an off peak tarrif.

    This is the answer from Eon:
    I have had a look at your account to investigate your meter timing switch details.
    For your general purpose usage the reads would be as follows:
    04589 = Night general use (R3) 02:30am – 07:30am (off peak time)
    27653 = Day General use (R4) 7:30am -02:30am (peak time)
    For your heating –
    28504 – stored heat (R5) (22:00- 00.30, 02.30 – 07.30, 13.30-16.00 off peak times)
    Therefore your general usage will show on R3 or R4 depending on the time of day the energy is in use.€

    Does this mean that for general energy use in Economy 10 we’ve got only 5 hours off peak and 10 hours is for heating ONLY??

    Please help as we pay really horrendous bills now…


    Hi Monica

    We were previously with eon for e10; and what you say is actually the case. Whilst you have a three read meter, the ten hours will only apply to water and stored heat, where as the overnight 5 hours is the reduced rate for the entire supply (i.e all plug sockets) – which is why it’s best to set timers etc so your appliances utilise the discounted rate overnight

    Eon did change our meter last year to a two read meter (at their decision, we didn’t request it) which then meant that the entire supply was then discounted for the whole ten hours


    My E10 is a strange one….old-style meter, ONLY works to heat the immersion and storage heaters (both of which are wired directly to the off-peak meter, so no need for timers on the heaters or immersion itself). Circa 80’s, and not altered or even looked at except for safety checks.

    But the times I get are 7 hours overnight, then 1 1/2hr boosts at lunchtime and early evening – perfect for me because it gives a handy boost to the heaters and hot water during the day.

    I also get a great deal on my tariffs because I have a standard tariff for peak and then another one for the off-peak, with no standing charge on either. Because I don’t use much electricity, this is cheaper than any of the newer E7 style tariffs that have lower unit prices but a big standing charge. I regularly check the maths on this myself.

    I’m concerned that when the ‘smart meters’ are put in by 2020, my meters will be changed by force and I won’t be able to make use of this legacy set-up any longer. Will be a shame, I enjoy being on this weird tariff with my little daytime boosts!!


    I believe you have what was known as a “White Meter (tariff)” – its great not to have a standing charge; as far I was aware there were no tariffs left without one. Be careful to keep your head down it as it is probably quite cheap…. I am sure that everyone would be interested to know who supplies the electricity?
    It is not dissimilar to E10 but for the daily-hit…


    Yep, as someone living alone and out a lot of the time so not a heavy elec user it works out great value. Anyone with a family it wouldn’t, because the saving on standing charge would be outweighed by the higher per unit cost. I believe the previous owner had had it for many many years and when I bought the property I gladly just did a name change with the supplier.

    And my thoughts exactly, I never mention ANYTHING to my supplier (one of the big 6) about it because I’m just pleased to still have it. The daytime and early evening boost at low rate are especially useful. I know there is a small downside – lack of economy 7 rate through the mains plugs overnight, but negligible for me because I’m in an apartment and wouldn’t be running washing machines, dishwashers etc at those hours anyway due to neighbour consideration.

    I will just say that my supplier definitely doesn’t offer it as one of their tariffs now – hence my concerns…in fact make that expectation, that I will lose this once the meters are changed for smart meters.


    We had this concoction until 10 october. Kicked up fuss with EOn coz having 2 mpan numbers prevents you switching. SSE advised me to request new metre so everything cheap rate 10 hrs daily. Currently now using 25 cheap 10 day rate.


    With southern electric in west midlands, off peak times areE 10 but are 2 hrs out via radio switch .Is it my switch or them not telling me?


    can anyone tell me when are the cheap rate times for E10 in Scotland, Extra Energy are telling me different things,



    I was wondering if I could get some advice here, I have just moved into a brand new build flat and the Economy 10 programmer/timer unit they have installed doesn’t give me Economy 10 tariff it only gives me the following – 00:00 – 05:00am then 13:00 – 15:00 then 20:00 – 22:00 so that’s 9hrs a day not 10. I have spoke to SSE who were great about it all but they stated they don’t install the economy 10 programmer/timer units its the electrican. I have since spoke to the housebuilder who has just informed me that they are contracutally obligated to only install a heating system that gets it as close as they can to the tariff and that’s it!!!!! Is this correct????


    Ypu ask your e10 supplier to supply you with single rate electricity and the meter to match! Then change to the best single rate you can find…and some seem to make a great deal of sense. I was seriously considering similar course of action until I found Extra Energy today. Btw… your area “board”… don’t know what its correct…but mine is Eastern Electricity…dictate the times of supply.


    It’s the meter that sets the times, not anything connected after it. You then have a separate timer to switch things on during the cheap times. How this is set up really depends on how the property is wired up. All the heating might be on one circuit, so you’d have one timer set to the right times. Sounds like what you’ve got and there’s no reason why you can’t set it up how you like, including using non-E10 hours if it gets cold.


    Hi, If your meter is out by two hours or more you should contact southern electric and they will arrange an engineer to call to correct, under 2 hours a supplier won’t amend. This was the info e.on gave me when I queried mine.


    Hi, I recently contacted our E10 supplier (EDF) concerning the change to British Summer Time as our E10 meter does not change when the clocks go forward. I was advised to just use appliances an hour later to bring the timing into sync with the meter clock. I then told them that the meter clock was 20 minutes fast and could they please put it right .this they refused to do saying i need to adjust the times I use appliances accordingly. So now we are putting appliances etc on 1 hour and 20 minutes later than during the winter. Are you still with me?! Then I was told that the electricity supplier can delay the start of the E10 period by 45 minutes and we should take this into account also. Can this be correct? Also, if we adjust the timing of the cycles of the washing machine, dishwasher etc they can go over the end time of the cheap period but EDF said that we should still get our 10 cheaper hours. I’m so confused! Regards Julia.


    I can understand your concern, 20mins is a lot, does it finish 20 late as well?, They stagger start times to stop a surge on the power lines when the meters change over, we have to adjust our heater timer for BST it is a bit crazy, as long as you still get 10 hours it’s within the rules I suspect, Brian


    My E10 meters stay on GMT as well but hot water and storage heaters are separately connected so no problem (the are controlled from the meter contactor) My dishwasher and clothes-washer are plugged into timers and I occasionally check them against the meter clocks to make sure they stay in synch. I can easily tell if the low-rate is active (i.e. on cheap rate) as my hot water system has a neon indicator to show when it’s powered.


    Most time of use electricity meters are fairly dumb things. To know when the clocks change they’d have to know the date as well as the time and thus when the last weekends in October and March are. And to know the correct time they’d have to sync with a radio signal or something. They’re generally far more basic than that and simply switch counters twice or six times a day, and the internal clock will lose or gain unless someone put it right occasionally. Mine is ten minutes fast at the moment but it’s losing and will be right time in about five years if nothing changes. Altering the timing on the heating twice a year isn’t such a huge task.


    It’s the clock on the meter that’s 20 minutes fast Brian. How do we know the exact time that the cheap period starts if they stagger it?


    When I say stagger, I mean each meter is set to slightly different start times when they are installed, so yours will always start at whatever it is set at, although 20 mins is a lot mine is about 4, if you syncronise your usage to your met times you will get the best from it.
    As far as knowing when it starts my meter changes with a clunk and indicates with a 1 or 4 flashing on the LED display showing which tariff is in use, so I suppose it depends on your type o meter how you can tell when,



    Most meters have some sort of indicator to show you which charging rate is active? With some it could be that rate 1 or 2 is on the display and flashing when you check it, or an arrow pointing to the current time period…or led light, something like that. You can check this at the time the rates change to see the exact time it switches.


    Hi, I’ve just come off the phone to EDF, I am changing from their Warmwise tariff to E10 standard variable rate (might then change again to another provider later) – they mentioned in passing that the switching times shown above are GMT and don’t change to BST, so during the summer they are one hour different – England is 1-6 am, 2-5pm then 9-11pm.


    Yes that’s correct Nicholas, we have to change our heating clock to keep it in line because that adjusts automatically it does not cause a problem other than that, the water is just an hour later heating up on each session, that’s controlled by yhe meter.

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