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Legacy E10 meter (dual MPAN) - stuck with current supplier
I currently have an old E10 meter at my flat, supplying me with 2 rates of electricity with 2 MPAN numbers. The flat has 3 storage heaters and a water storage exchangers which I suspect was the reason the flat was wired as such.
Currently I am with NPower on their standard variable Heatwise tariff which turns out to be really expensive as it is the Ofgem Cap price.
I have queried with Bulb about a switch, and was told that as I have 2 MPAN number, I would need to be charged 2 standing charges instead of 1
I don't mind forking out a bit to modify wiring/meter/etc, but what options do I actually have?
I have read various advice which include:
Currently I am with NPower on their standard variable Heatwise tariff which turns out to be really expensive as it is the Ofgem Cap price.
I have queried with Bulb about a switch, and was told that as I have 2 MPAN number, I would need to be charged 2 standing charges instead of 1

I don't mind forking out a bit to modify wiring/meter/etc, but what options do I actually have?
I have read various advice which include:
- Switch to a new meter with 1 MPAN (but how?)
- Switch to a E7/single rate tariff (but how?)
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Comments
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You would need to get an electrician out to rewire the heating and hot water, either to single domestic or economy 7. If you are using the storage radiators you should most likely go to E7. Once you have the heating and water not needing E10 you can ask your supplier to remove one of the MPAN's from the national database. Once done, you can then switch. E10 usually works best if someone is in during the day and needs a boost of heating so do your sums.Self Employed, Running my Dream Jobs0
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You can switch to any major supplier on a single rate tariff but that is unlikely to be economical with storage heaters and the tariffs are only available on the phone, you need to speak to their specialist metering departments.
You could contact your current supplier to get an E7 meter installed but they will likely charge for doing it and you would need to get an electrician to check over your wiring layout and make any necessary changes at your cost.0 -
You would need to get an electrician out to rewire the heating and hot water, either to single domestic or economy 7. If you are using the storage radiators you should most likely go to E7. Once you have the heating and water not needing E10 you can ask your supplier to remove one of the MPAN's from the national database. Once done, you can then switch. E10 usually works best if someone is in during the day and needs a boost of heating so do your sums.
This question is constantly appearing on here probably because of the very high prices the two or three suppliers who support legacy meters are now charging when Eco 7 rates are much lower.
No one has ever come up with AFAIK either examples of a typical supplier charge or an electrician s rates to switch what are termed as complex meters, white meters, Eco 10 or dual Mpan into the much more competitive rates available on Eco 7 with a large number of suppliers in competition.
We could do with some prices to pass on our advice to the many future enquiries which are bound to come, especially now with the many electric vehicles hitting the streets.0 -
An update:
It transpires that the development was originally supplied by what is now EDF. It was originally done with a dual MPAN E9 tariff. At some point the previous resident switched to NPower while other flats remained with EDF.
In 2012 EDF changed everyone else's meter to a newer one (H09) as opposed to a black H02 which we still have. Their meter is also now with single MPan as opposed to dual MPan.
Which should we do in this case? Wait out for a smart meter? Or force a meter change by NPower?0 -
Bumping this thread for the assistence of the OP who seems to have returned0
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An update:
It transpires that the development was originally supplied by what is now EDF. It was originally done with a dual MPAN E9 tariff. At some point the previous resident switched to NPower while other flats remained with EDF.
In 2012 EDF changed everyone else's meter to a newer one (H09) as opposed to a black H02 which we still have. Their meter is also now with single MPan as opposed to dual MPan.
Which should we do in this case? Wait out for a smart meter? Or force a meter change by NPower?
Phone Npower and ask them. They changed my old legacy dual mpan for a single rate for free. However, I had removed the storage heaters for GCH So a slightly different situation. I did enquire a few years back about changing the legacy meter for E7 and they quoted something like £79. After I worked out how much I would save it came to about £2 a year so I didn't bother. Both times they were actually very helpful on the phone (the actual meter changing and subsequent billing errors are another story!)0
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