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Rank 5
April 17, 2026
Solved

New heating system but struggling to get the right tariff

  • April 17, 2026
  • 131 replies
  • 1024 views

Hi Everyone,

Thank you to all those who helped last year regarding Air Source heat pump as my oil boiler went down and i was having trouble with my housing association about when it was going to be installed etc. That was in May last year.

 

Fast forward to this year we now have a heating system ....its Storage heating and I spoke to OVO regarding all this being changed in January this year apparently yes then at the last hour it was no. Ok so I tried to look for a different company that do Economy 7 tariff.

 

Found one but now OVO don't want to let me go due to a huge bill which I have due to it being wintertime and having to use electric heaters due to no heating system can anyone advise  me what to do obviously I didn't really want to leave but ....its a case of having to but then if OVO did Economy 7 or something similar I wouldn't have to.

Best answer by BPLightlog

​... will Viv1966 be able to get a duel tariff like Economy 7 with the meter setup they have ?
  

If you’ve been advised that we can’t switch you to Economy 7 (which is generally the case) 
 

We can’t tell whether this meter is capable of switching an offpeak circuit on and off. Even if it did have the internal switch necessary, there would have to be an external contactor to do the actual power control.

It seems that the magic use-excess-solar-generation-to-charge-heaters system only works if the heaters are wired to a constant circuit (i.e. not having the charging bit separate from the control bit so charging only happens during offpeak hours). Again, we can’t tell whether this is Viv’s arrangement. It involves installing some extra bits and bobs including a CT clamp, all included in the optional Solar Box.

 

 

As ​@Firedog suggests, a separate supply is not needed for these 

So that should mean that a traditional 4 terminal smart meter should work with these heaters.

The balance would then be how much energy is needed during the day for other appliances and how the units are connected 

 

131 replies

Viv1966Author
Rank 5
April 23, 2026

 

juliamc
Rank 20
Rank 20
April 23, 2026

This is our inverter - it’s in our garage and it’s about 2ft high. When it’s daylight the screen lights up and it gets quite warm. I don’t know much about storage heaters I’m afraid but ​@Firedog is yer man there!!

Ben_OVO
Community Manager
Community Manager
April 24, 2026

@Viv1966 yes - still contact the Complaints team about this one. If you reply to the last email sent to you by your complaints handler, then this will reopen the complaint.

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Viv1966Author
Rank 5
April 24, 2026

Morning ​@juliamc  ok i didn't think it was that.  The point is we don't have a garage so the only place i can think of as i don't think its outside, is in the loft and i know the workmen did go into the loft.  I have asked the Installing Manager about the Solar Box  as   i wanted to align and connect an app to my heating system in conjunction with my Solar Panels....but apparently there wasn't one. I have registered them but how do i know how much export i have etc?

Viv1966Author
Rank 5
April 24, 2026

Morning ​@Ben_OVO  ok thank you for all yoir help plus ​@BPLightlog, ​@Firedog  and ​@Nukecad and ​@juliamc  you have all been amazing and my "go to" since all this started. I think every energy company shoulld have a community  forum like this, its so useful when information is sparse about how things work electrically etc. You all do a grand job! Keep up the amazing work you do! 

juliamc
Rank 20
Rank 20
April 24, 2026

I’m at a bit of a loss about your inverter. I assume your old oil boiler has been removed, have they put the inverter in the outside cupboard where the boiler was? Can you get the Installing Manager to come back and explain all the things that you now have and how they should all work together? They ought not just leave you to fathom it out !!!

BPLightlog
Super User
Super User
April 24, 2026

@Viv1966 what we all try to do is pass on our learned information, much from examples we’ve seen, discussed, seen problems solved. Some from our past employment but together we can generally pass on some useful insights or hints at least.

Although new technologies are adding complexity to the mix, electrical engineering is basically the same as it was decades ago.

And this is the forum, doesn’t matter which supply company the questioners use, we will try to help and OVO have been very good at enabling this space for the purpose.

It does sound like your new system and heating needs some better understanding, not least from those who installed it. Hope you get things sorted but please carry on posing your questions or updates. It certainly helps

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Peter E
Super User
Super User
April 24, 2026

This is a bit of a side track about Economy 7. I had never really looked into why suppliers were saying you can't move to E7 if you are on a single rate and the reason given was that is was a ‘technical’ issue which, strictly speaking, it isn't. It's due to the fact that E7 will cease to exist in 2030 and you can read more detail, which I didn't know about in the link below. So suppliers (as if they didn't have enough issues already) have to migrate E7 users away from this tariff by this date with possible increases in energy bills. E7 used to be very cheap at night (because coal fired generation was very cheap) so it was good for storage heaters, however, the night and day rates have changed over the years to give you almost no advantage if your day usage is similarly high. It's possible that other tariffs will emerge that are better aligned with the way we now generate power without causing a steep increase when E7 comes to an end.

 

https://www.clearsafety.co.uk/news/the-removal-of-the-economy-7-tariff-in-2030/

 

Peter

 

Reducing my yearly fossil fuel usage with an EV (-900 litres petrol), A2AHP (-8,700 kWh gas) and Timed Immersion heater (-1,500 kWh gas)
Nukecad
Super User
Super User
April 24, 2026

Perhaps we will start to hear more about the planned phasing out  of E7 (and E10) by 2030 now that the RTS meter exchange panic is coming to an end?

I can see that it’s going to be a difficult one for suppliers (and the Government) to justify to customers who don’t want to change to what may be more costly tariffs.

I said, Hey - Watts going on.
juliamc
Rank 20
Rank 20
April 24, 2026

 

What exactly is this? Might it have the Solar Box inside? ​@Viv1966 said it has an LCD with figures in it. Can you post a photo of the inside.