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Rank 2
September 21, 2024
Solved

Moving from THTC to another tariff- Will all consumer units be connected by Ovo to the new meter ?

  • September 21, 2024
  • 114 replies
  • 2608 views

We have THTC with consumer units for Storage heaters,fixed appliances & lighting/mains.

Will we be able to move to Economy 9 when the new meter is installed ?

Will all consumer units be connected by Ovo to the new meter ?

Can the power be delivered without being on a timer so we can manually control the heating.

Would like some idea of where we from here & whether the future will be more expensive.

Thanks

 

Best answer by Blastoise186

Updated on 10/06/25 by Ben_OVO

Check out our dedicated RTS FAQs page for more information.

Hi @connorsbjc ,

Blastoise186 is a Forum Volunteer

I can answer those for you.

When you contact OVO to arrange the migration/upgrade, you’ll be able to discuss the available tariff options. If Economy 9 is offered to you, feel free to select it. Otherwise, you’ll need to go for one of the options that does get offered. This will be done before any work is carried out. They are best placed to advise on costs.

OVO will migrate all wiring between the existing main fuse, meter and consumer units over to the new meter and reconnect everything. However, everything beyond the consumer unit(s) is your responsibility.

Per the terms of E7, E9 and E10, the meter must control the timings. You’ll be welcome to use the Boost function if you need a top-up though - but use of the Boost function would be at Peak rates.

 

114 replies

Blastoise186
Super User
Super User
October 4, 2024

It’s worth remembering that there’s also the random offset too - the tariff will factor this in so that when set correctly, both sides match up.

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Rank 2
October 4, 2024

Ah.What is this random offset ?

The power to the heaters went off this morning at about 8am ,which is 1 hour later than the off peak ends.

Are you saying that 1 hour wont be charged at Peak rate ? Confusing stuff 

Blastoise186
Super User
Super User
October 4, 2024

Correct - the meter won’t turn things on/off at precisely the start time to avoid blowing up the national grid - they all choose random times instead to make it less of a shock.

But I’d still do the reconfigure command anyway just to be safe.

I suspect it’s also a case that we’re in Summer time and the meter doesn’t change the times for BST.

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Rank 4
October 4, 2024

You can check the cost of the units at anytime by pressing the button on your meter.  Ours stays at the off peak lower rate until 8.30am. It's a steep learning curve for all of us but I have to say we are delighted with how it's going so far.  Being able to use our solar power for my  dishwasher... something we couldn't do with THTC....is just great!! 

Rank 2
October 4, 2024

Thanks again.
Will give it time to settle & make more observations over the coming days before calling to reconfigure.

I don’t mind it being out of sinc as I can adapt to that knowing the charges are correct.

The meter is on GMT & the tariff is changing correctly ,and precisely ,on time according to the in house display.

It’s brilliant to have your input. There must be thousands not on here tearing their hair out 🙈

BPLightlog
Super User
Super User
October 4, 2024

You can check the cost of the units at anytime by pressing the button on your meter.  …

 

It’s been really good to hear some of the positive updates on this change over but also notes from those with initial problems ( worth saying that the forum tends to record problems rather than the overall picture ) but one word of caution .. the rates shown on the meter are not necessarily the ones used for billing. You should double check what rates are on your plan page to confirm your different time slot prices. 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Rank 2
October 4, 2024

I agree with BPLightlog about the rates shown on the meter. The rate mine shows doesn’t correspond to the quoted rate for Economy 9.In fact it’s less 😳

As I now have heating,which was not the case when I first came on here,I will take a few days to check things before making judgement (in the warmth).

I also think that with the difference between off peak/peak being so little these days that an hour or so out will not break the bank & not worth the stress in the long run.

Blastoise186
Super User
Super User
October 4, 2024

The SMETS Command Update Tariff Configuration usually fixes that one! :)

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Rank 2
October 4, 2024

Is the Update Tariif Configuration done by Ovo or can it be done by me at the meter ?

Blastoise186
Super User
Super User
October 4, 2024

OVO needs to do it - you can’t do it locally.

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