Economy 7 - two standing charges very expensive

Robin9 wrote: »

There are E7 installations where there are two meters but the standing charge is not per meter is is per supply.

Do you have any authority for this as I have a meter with two MPANs and have run into suppliers wanting to charge two standing charges. It would be useful to be able to quote some regulations in response.

Katie-Kat-Kins wrote: »

Do you have any authority for this as I have a meter with two MPANs and have run into suppliers wanting to charge two standing charges. It would be useful to be able to quote some regulations in response.

Two MPANs = Two Supply Point = Two Standing Charges, One MPAN (regardless of number of meters = One Supply Point = One Standing Charge.

Katie-Kat-Kins wrote: »

Do you have any authority for that?


I have previously only been charged one standing charge. I ran into the two standing charge thing when I tried to switch and was surprised by it.

My quote came from Wikipedia - A Meter Point Administration Number, also known as MPAN, Supply Number or S-Number, is a 21-digit reference used in Great Britain to uniquely identify electricity supply points such as individual domestic residences. The gas equivalent is the Meter Point Reference Number. The system was introduced in 1998 in order to provide a competitive environment for the electricity companies, and allows consumers to switch their supplier easily as well as simplifying administration. Although the name suggests that an MPAN refers to a particular meter, an MPAN can have several meters associated with it,[1] or indeed none where it is an unmetered supply. A supply receiving power from the network operator (DNO) has an Import MPAN, while generation and microgeneration projects feeding back into the DNO network are given Export MPANs.


to which I would add

https://www.eonenergy.com/new-connections/FAQs What is an MPAN?

Also known as the Supply Number. It is the unique registration number given to each domestic and small business electricity customers.

The only time there should be 2 MPANs is where there is an export meter - even where the two registers are physically in the same meter.

spiro wrote: »

That is wrong there are other instances when you can have 2 MPANs. It is possible to have 2 MPANs and 1 meter.

Yes I have one meter, supplying one property, but two MPANs. It is for a heatwise set up.


Such a nuisance. I could do with working out whether it is in fact permissible to charge two standing charges in this situation or not as it would make a big difference to my bills.

Katie-Kat-Kins wrote: »

Yes I have one meter, supplying one property, but two MPANs. It is for a heatwise set up.


Such a nuisance. I could do with working out whether it is in fact permissible to charge two standing charges in this situation or not as it would make a big difference to my bills.

Right, so what you have is E10/Heatwise,not E7, nor can you check that tariff on any comp site, as most suppliers do not support it. You have two options: try and find a better Heatwise tariff by manual calculation, or switch the metering to a conventional E7 system with a single MPAN, which will give access to all the suppliers in the market, including OVO.
There will be a one-off meter change cost, and possibly some rewiring on the consumer side, which must be done by your own sparky, but the savings may make it worthwhile in the long term.
IIRC, the only 2 suppliers who still support E10 are EoN and EDF. It's not a great system for NSH's unless you need that afternoon boost, which correctly set and sized NSH's should not.
Update: you may find this article useful: it states that Eon no longer offer E10 to customers with an older E10 meter which has 2 MPAN's. Which indicates that, should you wish to stay on E10, it it worth a meter change to avoid paying 2 standing charges.. If you are with Eon, this is free. Or switch to E7 from next month, and there will be no charge for the meter change.
http://www.which.co.uk/news/2017/05/can-you-save-money-on-off-peak-electricity/