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November 5, 2024
Solved

Tariff switch timing wrong? Eco 10 new meter

  • November 5, 2024
  • 19 replies
  • 831 views

Hi all! 
I’m a conscript grime SSE. I have Eco10 with a Landis and Gyr meter. I have storage heating.

the heating is added in to the normal circuit by a contractor fitted at the same time as the smart meter.

The economy rate is switching in and out either early or late depending on how it feels. 

I could only tell it was switching in or out by the clonk. There is no indicator of which rate is active. I’ve now got a bulb to indicate on economy. 
I’ve now got a timer on economy so I can see active economy hours.

I'm only actually getting 9 hours of economy rate instead of 10. 

Not a good start. 
I ignored the sudden £5000 debt for now.

I know a lot of you are volunteers so I appreciate your help. 🙈
 

Best answer by Firedog

Updated on 06/05/25 by Abby_OVO

 

The pictures are very helpful, thanks.

We’ve seen this sort of meter before, but with a Landis + Gyr contactor for the offpeak circuits bolted on to the meter itself, like this:
  

L+G E470 5533 with L470 5451 100A contactor 


You have a separate one which ought to behave in the same way. The meter sends a signal at the appropriate time (down the thin blue cable) to the contactor to switch the power on and off to your heating equipment. 

It sounds a bit unlikely that the switching time varies from day to day; the times should be set in stone inside the meter itself. If you can document the times the circuit switches on and off (the two daytime slots would probably do), you’d have some evidence for the smart team to examine. 

The switching times should coincide with the tariff changes to avoid not intentionally powering up heaters outside of offpeak hours. There may be a built-in delay to make sure you’re on the cheap rate before the heating switches on; with six switching times, this could add up to perhaps half an hour. If the times are very different, something’s not right. Get your facts together - along with the photos - and then get in touch with Support.

You can always run other equipment at the cheaper rate - washer, dryer, hoover, for example - from the start of an offpeak period regardless of when the heating is turned on.

 

For more information on Economy 10, check out the topic below:

 

19 replies

MclacrAuthor
Rank 2
November 11, 2024

S xxx, in the meantime will be over paying for some power and not getting the full time on my heating.  OVO have had a long time to prepare for the change in metering. I’m not happy with your answer. Time will not sort this out. It needs attending to as soon as possible. 

Please consider this as a complaint now.

I have spent a long time working out what is going on with this system.

Please supply me with a job/ticket number for this fault and register my complaint.

Firedog
Super User
Super User
November 11, 2024

Thanks, I’m in the South of England.
  

Sorry for jumping to conclusions!
    

I was told that the off peak period was for everything ...
I’m not getting the duration of off peak power that I was told I would … 
 

I don’t think that’s the case. The meter should be set up to change tariff at the times in your plan, shifted by the 8-minute randomized offset (if my guess is correct). That means that anything you use in the offpeak periods will be charged at offpeak rates, so you just have to be careful in those first eight minutes. The heater switching times times are separately controlled, so the fact that they’re coming on late only means that you’re getting less charging time than you bargained for. If it’s proving to be too little (they’re blowing cold before the next charge period starts), then a tweak like I suggested should help, it it proves to be possible.

I agree that the support agent wasn’t a great deal of help. However, I hadn’t realized that this meter was brand new, so it is possible that some things haven’t settled down yet.
  


I was a little bit surprised by the meter exchange label visible in your third screenshot. The Installed meter serial no. looks suspiciously like the Removed meter’s one, and completely different from the number on the meter itself. OVO’s engineers are usually more careful than that; was this perhaps a contractor rather than a home-grown OVO installer - one of these?
  

 

Noel | I have no official status; I'm just a volunteer who comes here to help other customers. My gear: Aclara SGM 1416-B Electricity-only E7 meter; Chameleon IHD3-PPMID-AAA | It may look as if I know what I’m talking about, but don’t let that fool you. |
MclacrAuthor
Rank 2
November 11, 2024

Thanks, I’ll check the meter numbers. 
The heaters are off peak and should be powered for all of the off peak time as far as I’m aware. As I said I should be getting 10 hours off peak. For everything. As I was told on the phone.  All my off peak before went to the heater circuit. 

Firedog
Super User
Super User
November 11, 2024

The heaters are off peak and should be powered for all of the off peak time as far as I’m aware. …  All my off peak before went to the heater circuit. 
 

There is no ‘heating circuit’ post RTS. Your heaters are on a dedicated circuit, but the difference is that the circuit is only live when the ALCS in the meter says so. Ideally, it should be on for the whole of the offpeak periods, but the ALCS may have been configured to start 30 minutes late to avoid, as I pointed out, charging before the tariff change has taken effect. If you have an immersion heater for hot water, it may have been wired on the same circuit. Check its controls to make sure it’s not running for all of the offpeak hours; that would probably be a waste of energy. 

  

… I should be getting 10 hours off peak. For everything. 
 

You are. You’ll have to check the meter itself* to see precisely when the tariff changes from peak to offpeak and vice versa; I expect you’ll find that it changes like clockwork at ~8 minutes after the advertised times, for the reason I’ve given. When you know what the exact times are, you can adjust all your heavy consumption to suit. I’m not familiar with that sort of meter, so I can’t give the easiest way of seeing just when the tariff changes. You’ll have to experiment.
  


*   Your IHD may also show the tariff change at the same time as the meter, but I can’t be sure, so I’ve asked the experts. What sort of IHD did you get with your new meter?

Noel | I have no official status; I'm just a volunteer who comes here to help other customers. My gear: Aclara SGM 1416-B Electricity-only E7 meter; Chameleon IHD3-PPMID-AAA | It may look as if I know what I’m talking about, but don’t let that fool you. |
MclacrAuthor
Rank 2
November 11, 2024

Thanks, the IHD does not have a peak/off peak indicator. It tells me the price per hour at the current consumption rate if I made a chart I could use that but I shouldn’t have to. 
This is the IHD. I can’t read the tiny writing under it. 

 

MclacrAuthor
Rank 2
November 11, 2024

The lack of a peak/off peak indicator is why I had to plug a lamp into  what was the old off peak circuit to see when it was supplied. 

MclacrAuthor
Rank 2
November 11, 2024

The rate doesn’t change 8 minutes after the published time. It gives about 1.5 hours less off peak. At least it switches the old off peak circuit like that. 

Firedog
Super User
Super User
November 12, 2024

The rate doesn’t change 8 minutes after the published time. It gives about 1.5 hours less off peak. At least it switches the old off peak circuit like that. 
  

On the IHD, touch OK, then OK again to access Account information. Touch the right arrow twice; the current tariff should be displayed and, I suspect, change with the tariff on the meter. Your observations suggest that this happens about 8 minutes after the advertised times. When the lower tariff is active, all usage is charged at the lower rate. There will be 10 hours offpeak each day, probably to the second and certainly to a minute.  

This is quite independent of the times your heaters are switched on and off - please try not to confuse the two sets of timings. Of course, the heaters (and anything else wired to the switched circuit) shouldn’t be switching on before the rate has changed to the lower one, and they should be switching off before the higher rate takes effect. 

In your photo, the traffic light at the foot of the screen is green. I would expect this to turn amber - or possibly red - when the heaters turn on, to show a higher than usual power draw. The same will happen when you turn on the electric kettle. If you touch the Now button, you’ll see just what that unusually high power draw is:
 

Normal usage only. Green light.


 

Kettle on. Amber light.

 

Noel | I have no official status; I'm just a volunteer who comes here to help other customers. My gear: Aclara SGM 1416-B Electricity-only E7 meter; Chameleon IHD3-PPMID-AAA | It may look as if I know what I’m talking about, but don’t let that fool you. |
MclacrAuthor
Rank 2
November 12, 2024

Thanks, I understand what you are saying, I’ll check the IHD. The fact remains that I was told twice that during off peak hours EVERYTHING gets fed.