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March 10, 2025
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Storage heaters and 5 port smart meters- Can I have economy 7?

  • March 10, 2025
  • 15 replies
  • 839 views

Hi. I live in Scotland and had old fashioned storage heaters. I had the flat rewired so the old storage heaters came out and I bought Dimplex Quantum heaters to go in. Meanwhile, OVO installed me a smart meter in January and the engineer who installed it said I’d need to contact OVO to get the new meter upgraded to a 5 port version to accommodate the new storage heaters. Sounded straightforward, but on contacting OVO they now tell me I can’t have a dual rate meter and will have to run the system on the single rate. End of. They are very sorry etc. It’ll be unaffordable! Reading posts on this Forum, I can see there are the SMETS2 meters available - so what’s the problem I’m having? Any advice or suggestions very welcome. Thanks

Best answer by Firedog

@Carry A couple of points:

  • Scotland’s a big country, served by two different DNOs. The options available might not be the same for both, so it would help to know what the first part of your postcode is to locate you a bit more precisely.
      
  • Whether ‘Economy’ tariffs are available might depend on how your meter is recorded on the national database. Can you find the MPAN grid (example below) on your latest bill, i.e. post-smart meter exchange? A screenshot of it, with the meter ID (the 13-digit number in the middle box on the bottom line) obscured, might shed some light. 
      
    (The left-hand box on the bottom line tells us who the DNO is, so that would also answer my first question ...)

 

The MPAN grid

 

15 replies

Firedog
Super User
FiredogSuper UserSolved
Super User
March 13, 2025

@Carry A couple of points:

  • Scotland’s a big country, served by two different DNOs. The options available might not be the same for both, so it would help to know what the first part of your postcode is to locate you a bit more precisely.
      
  • Whether ‘Economy’ tariffs are available might depend on how your meter is recorded on the national database. Can you find the MPAN grid (example below) on your latest bill, i.e. post-smart meter exchange? A screenshot of it, with the meter ID (the 13-digit number in the middle box on the bottom line) obscured, might shed some light. 
      
    (The left-hand box on the bottom line tells us who the DNO is, so that would also answer my first question ...)

 

The MPAN grid

 

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. |
CarryAuthor
Rank 2
March 13, 2025

Hi both. Thanks for your responses. 

Emmanuelle - I’d rather focus my time and effort on finding a correct answer (and hopefully a solution) than complaining. If the answer is - we can’t do this right now but will be able to in the future, then I’ll have to wait. If the answer is “we’re not ever going to do this” then I’ll cancel the installation of my storage heaters (scheduled in 2 weeks) and buy something else. 

Firedog - I had no idea there was so much info on my bill! The DNO is 17, which will tell you I’m in a PA postcode. Not sure how to do a screenshot (never been on a forum before either), but it looks like this:

 

   01 - 500 - 100

S  17 - xxx - 000

Does that help? Thanks

Firedog
Super User
Super User
March 13, 2025

I had no idea there was so much info on my bill! The DNO is 17, which will tell you I’m in a PA postcode. 
 

You’d be surprised! DNO 17 is the old Scottish Hydro region, which you may see called _P, a designator for the Grid Supply Point group which is almost always the same as the DNO area. It doesn’t locate you any more precisely than that.

  

   01 - 500 - 100

S  17 - xxx - 000

Does that help?
 

That’s fine, thanks. For a start, the first number - 01 - shows that this is a single-rate metering point. Anyone seeing that might assume straight away that multi-rate (peak and offpeak) tariffs just aren’t possible. That could explain some of the odd responses you’ve had from support staff.

The middle number - 500 - means just what you’d expect - no time restrictions. For a multi-rate meter point, the number would be different and indicate at what times offpeak changes to peak and vice versa.

Since you had storage heaters before the meter exchange, I’d be surprised if you weren’t then on some sort of economy plan with cheaper overnight electricity to charge up the heaters - and possibly a hot water tank, too. Were you? If so, someone has gone to the trouble of changing your meter registration from multi-rate to single-rate. I can’t imagine why, but that’s probably the reason why Computer says no

As ​@Emmanuelle_OVO said, it may be best to enter a formal complaint about this. This would eventually give you a dedicated complaints handler who can delve into the history of your account, find out who did what when and why, and with any luck get you back on track towards getting a less expensive tariff. I don’t think you’ll get anywhere fast otherwise.

I don’t think there’s much doubt that modern storage heaters would work much better than the old ones, but only if you’re not paying over the odds for the electricity you use. Any other solution (“I’ll cancel the installation of my storage heaters ... and buy something else”) will certainly be ruinously expensive, if you’re misled by advertisements for ‘more efficient heaters’. 

 

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. |
CarryAuthor
Rank 2
March 13, 2025

Thank you Firedog. Armed with a lot more knowledge I am now going to ring OVO again and see what Agent 3 tells me. Will update! Thanks

Emmanuelle_OVO
Retired Moderator
Retired Moderator
March 14, 2025

Thank you Firedog. Armed with a lot more knowledge I am now going to ring OVO again and see what Agent 3 tells me. Will update! Thanks


Keep us posted ​@Carry!

Renewable Energy? Big Fan.