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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
  • 2614 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
September 21, 2024

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.

 

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!
Rank 2
September 21, 2024

Thanks. Re my last point about control. 
Will the power to my storage heaters be available at all times for me to turn on/off as I require & not only at certain times as the case is now?

What is the boost function you mention.

Thanks for your reply today

Blastoise186
Super User
Super User
September 21, 2024

You’ll be able to use the Boost function of the meter to enable the heaters whenever you wish - but if you’re on E7, E9 or E10 it’ll be in your best interests financially to run them only during the Off-Peak hours that the meter will automatically enable them for.

The Boost function will activate them for between 1 and 3 hours - but you will pay the more expensive Peak rates to do so. However, you would be able to trigger it whenever you want rather than being totally restricted to Off-Peak hours only.

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Firedog
Super User
Super User
September 22, 2024

It also varies a bit how boost functions work. Some storage heaters will react by turning on their fan to blow out a bit more warm air, if the bricks are hot enough. Heating up the bricks for an hour won’t provide an instant blast of heat. 

An E10 system will heat the bricks up to near maximum overnight, then top them up twice during the day. This avoids the sinking feeling E7 generates when the heaters are exhausted in the early evening, just when you need them most. 

I’m afraid I don’t know how E9 works.

 

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. |
Rank 2
September 22, 2024

E9 has 3 x 3 hour slots during day & night, which will suit me as we only power up 2 heaters.

My main storage heater also has a convector built in for emergencies plus we have a log burner which warms almost everywhere.

Thanks for replies on this forum I think I now understand where I’m going ,allegedly 🤷🏽‍♂️

Firedog
Super User
Super User
September 23, 2024

OK - that makes sense (I think!). 

My main storage heater also has a convector built in for emergencies ...

 

That sounds as if the emergency convector heater is wired on the constant (24 hour) circuit, so you wouldn’t have to use the meter’s boost function to activate it. Unless you run it during one of E9’s offpeak periods, you’ll be paying the higher rate for it.

It’s worth remembering that all usage (not just heating) in offpeak hours will be charged at the lower rate, so it’s ideal if you can arrange to use other power-hungry equipment (electric shower, tumble dryer, washing machine, cooker for example) during those hours. This may not always be convenient, so it’s just a question of what you’re prepared to pay for convenience. The difference might be considerable.

As a matter of interest, do you know what the times are for the three offpeak E9 slots? This varies around the country.

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. |
Rank 2
October 3, 2024

HELP !

Had my THTC meter changed today for a smart meter on Economy 9 & while things are ok on the house circuit the storage heaters are not getting power at any time 🤷🏼‍♂️

I have found the boost on the meter & that works ok to supply power.

Anything I can do ?

Blastoise186
Super User
Super User
October 3, 2024

There is @connorsbjc ,

Have a word with OVO in the morning and ask them to Reconfigure ECAUL/ALCS. That should do the trick.

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!
Rank 2
October 4, 2024

Thanks for your reply.

So the power to the heaters came on at sometime in the night but are not now turning off at Peak Rate .

I assume the reconfigure will do the trick. 

Judging by this forum I am rather sceptical 😳

Rank 4
October 4, 2024

Ours go off just after 8.30am.  Check again in a little while. 🤞