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Rank 2
August 26, 2024
Solved

Complex meter: Refused Economy 7?

  • August 26, 2024
  • 83 replies
  • 2198 views

Hello, we bought our current flat a few months ago and found out that Ovo is our electricity supplier. It is an all electric property, with electric immersion heater for hot water and electric storage heaters. This flat was designed around off peak electricity.

 

There are 2 electricity meters, one so called white meter just for the off-peak circuit (storage heaters plus immersion water heater) and one for everything else, each with a separate MPAN number. The off peak meter turns the off peak circuit on and off, so that water heater and storage heaters only have power at night, it is the RTS type. 

 

When we moved in, Ovo created 2 account numbers, one for each meter and put each on the single rate tariff (without consulting or giving options).

 

This means that we have to pay the standing charge twice and we have to pay expensive rate for hot water and heating. 

I have contacted Ovo multiple times (calls and chat) asking to:

  1. have only one account with one standing charge 
  2. be moved onto some type of off-peak tariff (Economy 7 or something else)

 

I was told that neither is possible. I was told that they cannot merge the two accounts and that they cannot put me on Economy 7, because I have the two meter set up (complex meter).

Also, I wasn’t offered migrating to a 5-port smart meter with Economy 7 as a solution - I only came across it on this forum. 

I don’t understand this. Why can’t they offer some kind of peak / off-peak tariff to me?

 

I know about the shut down of RTS signal next year and the push to smart meters. However, switching to a smart meter is not useful for us if they refuse to change our tariff.

Also, I think we should only be paying one standing charge, as these two MPANs are associated (it is one household). 

Can you please advise? What are our options?

Best answer by Firedog

Updated on 21/04/26 by Chris_OVO

Check out our dedicated RTS FAQs page for more information.

You should hear shortly from OVO about arrangements for replacing your meters with a new smart meter, if you haven’t heard already. Until then, I’m afraid you’re stuck with the current tariff: OVO doesn’t have any that can apply one high rate to one of the supplies and a low one to the other, and I don’t think there’s any other supplier that could do this.

 

No-one with a complex metering arrangement (what the industry calls a Restricted Meter Infrastructure, RMI) should have to pay two standing charges if the tariff is single-rate. I would think that the artifice of two separate supplies is immaterial in this respect: you are being penalized in the way that this condition (SLC 22G) is intended to avoid. You should submit a complaint in writing about this, expecting to have any extra standing charges you may have paid refunded. Other customers who went all the way with complaints like this were also given compensation for OVO’s failure to comply with their licence conditions. Read about Ofgem’s decision on this sort of situation. 

 

83 replies

Rank 2
May 27, 2025

I have a new booking now. Replacing the complex 2 MPAN setup with a single smart meter.

I was promised that one of the two MPANs will be permanently removed from national database and one of my two accounts will be closed.

Emmanuelle_OVO
Retired Moderator
Retired Moderator
May 28, 2025

I have a new booking now. Replacing the complex 2 MPAN setup with a single smart meter.

I was promised that one of the two MPANs will be permanently removed from national database and one of my two accounts will be closed.


Please keep us posted with how you get on ​@EdinburghFan, it could really help other community members in a similar situation.
 


https://www.ovoenergy.com/guides/energy-guides/mpas

https://www.ovoenergy.com/help/article/electric-heating/one-meter-two-rates
 

 

Having "one meter, two MPANs" with OVO Energy likely means you have an electricity meter that's connected to the grid through two different Meter Point Administration Numbers (MPANs). This usually happens with certain types of tariffs, like Economy 7 or Economy 10, that offer cheaper electricity at certain times of day. 
 

Here's a breakdown:

  • MPANs:

    MPANs are unique identifiers for your electricity supply point and are used by energy suppliers to track your consumption and bill you correctly. 

  • One Meter, Two MPANs:

    This implies that your meter has two registers, one for daytime usage and another for the cheaper, off-peak hours. 

  • Why Two MPANs?

    Some tariffs, like Economy 10, use two MPANs to track the cheaper, off-peak electricity consumption. 

 

Renewable Energy? Big Fan.
Newcomer
July 12, 2025

I am not with OVO but came across this forum while searching for comfort plus control forums.

I have just joined the Ovo Energy Forum and hopefully I am posting my information in the correct place to get some feedback. If I should be creating a new post I am sure someone will advise me accordingly.

There is a lot of information in the threads for this post and I have read most of them with a high degree of interest. 

I keep reading about 2 meters and 2 MPANS but my system is 3 meters and 2 MPANS.

This is a Scottish Power installed CPC system when the house was built in 1995. I moved into this property in 2000 and spent 22 years with Scottish Power at horrendous rates as it was impossible to find an alternative energy provider. However in June 2022 EDF took over my supply and the bills were greatly reduced. However I find myself in the position of many others with the RTS switch off.

I have had a visit from an EDF contracted engineer to install a smart meter but that went nowhere fast as he didn’t understand the existing system and could not install a smart meter that would provide the same service.

I basically have a 3 phase supply with one meter allocated for the usual domestic circuits and this is on one MPAN.

The other MPAN has 2 meters one off peak and one 24hr economy supply for hot water and space heaters.

From what I have read in this thread it appears that the system I have will longer be available in that there can’t be a 24hr economy supply. A scary thought as I use more on the 24hr supply than the off peak.

Having recently spent approximately £12,000 installing Dimplex Quantum storage heaters and having rewiring carried out to supply the second feed for operation of these storage heaters it looks like I might have been better going in a different direction.

On the 1st of July EDF stopped my Standard Variable Heating Tariff and moved all 3 meters onto a Standard Variable Tariff, they also added in another daily standard charge. Using the figures from last years consumption my bill will increase by £1399 per annum. The annual consumption averages 19,500 Kwh and I thought being green and trying to save the planet was worth paying a little more than being on a gas powered heating system. I am waiting for EDF to come back to me regarding new meter/meters installation but I don’t hold out much hope.

I have tried other suppliers and received quotes at the end of June from Eon next and Scottish power but when I tried to change to either of them they informed me that they are not taking on new customers with complex meters.

I think I am starting to ramble and losing the plot. Bear with me for a few more lines.

I have heard about 3 phase smart meters being available does anyone know if this is an answer to the problem?

Hopefully I have posted in the correct place if not I can always try a new post. I can also (if any of the experts are interested) post pictures of the set up with my meters.

juliamc
Rank 20
Rank 20
July 12, 2025

You have come to the right place ! There are several knowledgeable people who can advise you, sorry to say I’m not one of them… Please do post photos of your setup and someone will be along soon.

Newcomer
July 12, 2025

Thank you Juliamc for such a prompt response, I have become accustomed to long waits when on this subject to Energy Suppliers.

I am attaching photographs of the installation in my property.

 

Blastoise186
Super User
Super User
July 12, 2025

Just want to keep you in the loop. I have seen this, but I’m diving tomorrow and need to prep for that tonight.

I’ll come back to this tomorrow evening! Please bear with me

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
Blastoise186
Super User
Super User
July 14, 2025

Ok, I’m back. Sorry for the delay but I was tired last night after I got back (diving is fun but it uses a LOT of your energy when you go to 20m at 9 Celsius!). But on the plus side, I may have just qualified as a BSAC Ocean Diver (pending verifications and discussions) so at least I have an excuse! :D

In theory, OVO is capable of doing this work, but it may need to be via their contractor SMS (not quite as likely if it’s not a CT Meter setup which this one clearly isn’t).

The snag is whether OVO is currently taking on customers with setups like this one. To save you the trouble of waiting in the queues to phone Support and get dropped off another cliff, I will make arrangements to do some digging for you. Please bear with me as I’ll fling this at the Forum Moderators - they likely know exactly who to ask.

We’ll keep you posted! Please monitor this thread as there may be more updates or questions from us as we figure this out.

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
Ben_OVO
Community Manager
Community Manager
July 14, 2025

Morning ​@Koolqat and welcome to the OVO Forum 😁.

 

I can see some of our Forum members are already on the case with helping you here, and I can see that you have quite a complex set up. I’m going to speak to some colleagues and see if I can gather any further information for you. In the meantime, I’ve been checking over EDF’s website and can see they have this info: https://www.edfenergy.com/rts-shutdown-2025.

 

I’ll be back in touch as soon as possible with further info for you.

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BPLightlog
Super User
Super User
July 14, 2025

Hi ​@Koolqat 

My info here won’t give you an answer but might help overall.

Your system uses a 3 phase input as you’ve mentioned and each phase feeds through its own single phase meter for power measurement.

Although I can’t see all the cabling tracks, given the multiple distribution boards/consumer units, each single phase looks like it feeds those separate sets of circuits for your different supplies.

While a 3 phase meter ‘should’ be capable of being fitted, the rest of the circuit wiring might need some adjustment for your internal system. You might need to get a local electrician to help once a new meter is installed.

You are correct that nothing will fully match any 24 hr feed but if OVO are able to make sense and fit a meter, there are tariffs with different rates available which might help your situation.

Ben will have more info available once he’s got his replies but given your setup, it might need a few extra steps to get everything in place.

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Newcomer
July 14, 2025

Hi Blastoise186

Thank you for chasing this along. I did try for a quote on the OVO website but they are not taking on complex systems just now although they said that they hope to be able to sometime in 2025.