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October 2, 2023
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I've got a THTC meter setup, can I get lower EV charging rates?

  • October 2, 2023
  • 22 replies
  • 467 views

I bought a house in Perthshire a few years ago with THTC installed so have 2 meters. I now have an electric vehicle, but it would appear that I can’t get the low charging rate advertised (and sent by email to me) by OVO to allow overnight charging. At the moment, I have to pay standard rate to charge my car when it would be cheaper to find an on street charger (not easily found in my area). Surely that is not right?

Best answer by Blastoise186

Updated on 28/02/25 by Chris_OVO

 

Update on RTS shutdown:

 

As part of the RTS Project development, we are really happy to share with you our progress:

 

As you may be aware, the RTS signal that instructs some of our meters when to move to the “Off Peak Period”  will be closing down soon and we need to arrange for all of our RTS customers to have a meter exchange so they don’t lose any of their meter functionality.

 

The RTS signal will end for our customers on 30 June 2025. The period between 1 July - 30 September 2025 will then be used to close-down the RTS signal and allow us to manage any unexpected customers impacted.

 

After a very successful pilot, from the 17th June 2024 we will begin writing to our Economy 10 RTS customers to invite them to call us to arrange for their meter exchange. 

 

We are continuing to work at pace to enable the same solution for the majority of our other RTS customers and our aim is to begin writing to these customers in Aug 2024. 

 

We will continue to update you on our progress.

This comment was posted by a forum volunteer.

Unfortunately, THTC is not currently compatible with Smart Meters - this is being worked on - and Charge Anytime requires a Smart Meter in Half-Hourly Mode, not least to act as a way of verifying that the usage is legitimate.

It’s unfortunate, but that’s just how it is I’m afraid. Until you can migrate, your best bet is to try to charge during the Off-Peak hours.

Connecting an EV Charger to the Off-Peak meter is not allowed I’m afraid if you’re on THTC. You might be able to come off of it provided:

  • You’re NOT in a Load Managed Area - your DNO can help you check this
  • You no longer need THTC e.g. your storage heaters are gone

If both conditions are met, you can make that request to OVO and they’ll try to make the arrangements if possible. It’s not impossible to do if the conditions are right, but it’s mostly down to whether the right engineers are around - and you’ll need an electrician to do some re-wiring as well.

 

22 replies

Blastoise186
Super User
Super User
October 2, 2023

Updated on 28/02/25 by Chris_OVO

 

Update on RTS shutdown:

 

As part of the RTS Project development, we are really happy to share with you our progress:

 

As you may be aware, the RTS signal that instructs some of our meters when to move to the “Off Peak Period”  will be closing down soon and we need to arrange for all of our RTS customers to have a meter exchange so they don’t lose any of their meter functionality.

 

The RTS signal will end for our customers on 30 June 2025. The period between 1 July - 30 September 2025 will then be used to close-down the RTS signal and allow us to manage any unexpected customers impacted.

 

After a very successful pilot, from the 17th June 2024 we will begin writing to our Economy 10 RTS customers to invite them to call us to arrange for their meter exchange. 

 

We are continuing to work at pace to enable the same solution for the majority of our other RTS customers and our aim is to begin writing to these customers in Aug 2024. 

 

We will continue to update you on our progress.

This comment was posted by a forum volunteer.

Unfortunately, THTC is not currently compatible with Smart Meters - this is being worked on - and Charge Anytime requires a Smart Meter in Half-Hourly Mode, not least to act as a way of verifying that the usage is legitimate.

It’s unfortunate, but that’s just how it is I’m afraid. Until you can migrate, your best bet is to try to charge during the Off-Peak hours.

Connecting an EV Charger to the Off-Peak meter is not allowed I’m afraid if you’re on THTC. You might be able to come off of it provided:

  • You’re NOT in a Load Managed Area - your DNO can help you check this
  • You no longer need THTC e.g. your storage heaters are gone

If both conditions are met, you can make that request to OVO and they’ll try to make the arrangements if possible. It’s not impossible to do if the conditions are right, but it’s mostly down to whether the right engineers are around - and you’ll need an electrician to do some re-wiring as well.

 

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SunSurgAuthor
Rank 2
October 2, 2023

Delighted to hear from you, Blastoise186  I have been reading several forums about THTC problems and you seem to have answered many. 

My understanding is that the THTC second (lower rate) meter only supports hot water and storage heating. Therefore car charging will come off the standard rate meter, or can it be connected to the overnight, lower rate meter? 

It surely makes sense to convert the electric supply in my house to that which is being used in new builds particularly as the old 2 meter system is no longer installed. I have no problem with the installation of a smart meter and assume this will allow for cheaper rate EV charging.   

Two years ago you responded to a question on another forum and said it was not rocket science to take out THTC, SSE just didn’t have enough engineers to perform this (I can’t find the original forum). Is this still the case with OVO, or has another problem arisen?

Blastoise186
Super User
Super User
October 3, 2023

Ah yeah, sorry about that! I was thinking about one of the other tariff types when I wrote that - you are right though. THTC doesn’t have Off-Peak everything like Economy 7 does.

Connecting an EV Charger to the Off-Peak meter is not allowed I’m afraid if you’re on THTC. You might be able to come off of it provided:

  • You’re NOT in a Load Managed Area - your DNO can help you check this
  • You no longer need THTC e.g. your storage heaters are gone

If both conditions are met, you can make that request to OVO and they’ll try to make the arrangements if possible. It’s not impossible to do if the conditions are right, but it’s mostly down to whether the right engineers are around - and you’ll need an electrician to do some re-wiring as well.

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Emmanuelle_OVO
Retired Moderator
Retired Moderator
October 3, 2023

Hey @SunSurg,

 

Welcome to the OVO Online Community, 

 

I can see Blastoise has already given some great advice here, just wanted to add we have an FAQ which includes some extra information about THTC meters:

 

 

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SunSurgAuthor
Rank 2
October 3, 2023

Hi Emmanuelle

Ive read that FAQ, it suggests changes are happening and that OVO will be in touch. However, my conversations with various people suggests that no solution has been found to phase out or develop a new RTS for the THTC meters and the deadline for switching off is fast approaching. I am in email correspondence with Teresa.

To complicate matters further, I want to install solar panels and feed excess power back into the grid. Again, this seems very difficult with THTC.

Ho,hum.

Emmanuelle_OVO
Retired Moderator
Retired Moderator
October 4, 2023

Hey @SunSurg,

 

I understand your dilemma, it sounds very frustrating.

 

I wonder if it’s worth doing some research to see if there are any other suppliers actively supporting this meter type currently? Or offering an exchange/solution? 

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SunSurgAuthor
Rank 2
October 4, 2023

I’ve been there before when SSE supplied the house. Basically very few suppliers could manage THTC and then many companies folded, as you know. I did think OVO would work out a solution, especially when they have been handed the problem with the takeover from SSE.

I’m about to speak to your solar panel team to see if they have any answers.

Fingers crossed.

Blastoise186
Super User
Super User
October 4, 2023

OVO has definitely got a solution in the works. :)

Unfortunately, most suppliers - to my knowledge - will choke on a THTC meter setup and only OVO and Scottish Power are currently capable of handling them at all if memory serves. And let’s just say the customer service of Scottish Power often leaves a lot to be desired...

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SunSurgAuthor
Rank 2
October 4, 2023

Absolutely, and bear in mind I am with OVO because of a buy out of SSE. I doubt I could go back to SSE even if I wanted to. 
I will wait for the fix by OVO which has to happen in the next 6 months or so. 
meantime, solar panels anyone?

Emmanuelle_OVO
Retired Moderator
Retired Moderator
October 5, 2023

Hey @SunSurg,

 

Let us know what the team say about solar panels. In the meantime, the website has lots of information about this topic. 

 

 

Renewable Energy? Big Fan.