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DisclaimerThis document has been prepared by National Grid Electricity System Operator Limited (NGESO) and is provided voluntarily and
without charge. Whilst NGESO has taken all reasonable care in preparing this document, no representation or warranty either
expressed or implied is made as to the accuracy or completeness of the information that it contains and parties using information within
the document should make their own enquiries as to its accuracy and suitability for the purpose for which they use it. Neither NGESO
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error or misstatement or opinion on which the recipient of this document relies or seeks to rely other than fraudulent misstatement or
fraudulent misrepresentation and does not accept any responsibility for any use which is made of the information or the document or (to
the extent permitted by law) for any damages or losses incurred.
In the event of any conflict or inconsistency between this document and the Capacity Market Rules, the Electricity Capacity Regulations
or the Auction Guidelines, the latter documents take precedence. Capitalised terms used in this document shall have the same
meanings given in the Capacity Market Rules.
ConfidentialityThis guidance document, and its contents should be considered as confidential in nature, and this document is supplied on this basis.
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Copyright National Grid 2019, all rights reserved.
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Version control
The table below will record the page numbers of any new changes to the document for each version. The
new changes will be highlighted in yellow throughout the guidance document.
# Changes Pages Date
1.0 Original document - 08/07/2019
2.0Changes to Meter aggregation overview and Meter
aggregation submission 5, 6, 9 & 16 16/08/2019
2.1Changes to improve the understanding of the
process
6, 7, 8, 9,
12,13,15,1607/09/2020
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Contents
1. Metering aggregation overview
2. Submission of Meter aggregation
3. Adding new component (system overview)
4. Amend Metering aggregation details (system overview)
5. Metering Assessment overview
6. Metering Assessment deadlines
7. Metering Test Certificate deadline
8. Delivery Body assessment timeline
9. FAQ section
10. Contact details
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1. Metering aggregation overview (1/11)
Introduction of metering aggregationThis change has come into effect to simplify the existing process.
All CMU types must provide accurate Metering Data data before the start of
Delivery Year.
The CM Settlement Body will review all Metering Data information submitted by
a participant.
No offline spreadsheets to be provided. Metering aggregation to be submitted
via EMR DB Portal.
Further EMRS guidance related to Metering can be accessed here.
Please note - National Grid ESO, in its role as Delivery Body, is continuing to
administer the capacity market and as part of this shall support capacity providers with
meeting their current obligations. However, capacity payments shall not be made to
capacity agreement holders by the Settlement Body (the Electricity Settlements
Company) until State aid approval has been granted. Continuing to meet obligations
under existing capacity agreements will enable capacity providers to be in a position to
be eligible for any deferred payments due in relation to the standstill period should
State aid approval be granted.
What has changed?
• ART (aggregation rule
template) will no
longer be submitted
offline
• The Metering Data
must be provided
before the start of the
Delivery Year and the
submission of
Satisfactory
Performance Days
• EMRS will be able to
view and process the
ART via the EMR DB
Portal
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1. Metering aggregation overview (2/11)
Meter aggregation Rules and entity identifiers
Meter aggregation Rules are used by the EMRS Settlement system to calculate the Metered Volumes per Capacity
Market Unit (CMU). The Rule is based on CMU components which are made up of an Approved Metering
Configuration Solution. Each CMU is made up of one or more CMU components, which can be made up of one or
more Metered entities. The output of the aggregation Rule is used to determine whether the CMU has met their
Capacity Obligation.
Depending on the type, classification and Connection Arrangement of a CMU, the required Meter aggregation fields
differ and is requested in system accordingly.
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1. Metering aggregation overview (3/11)
Meter aggregation details
as per the CMU
configuration
• Blue highlighted cells are Meter
aggregation fields
• Yellow highlighted fields are
the ‘Meter Configuration’
dropdown which user can
select as per the CMU Meter
aggregation:
- M = Mandatory field for the
selected ‘Meter Configuration’
dropdown
- N/A = Not applicable Meter
aggregation field for the selected
‘Meter Configuration’ dropdown
• Actual field validations are
highlighted in columns with
amber headers
MPAN
MSID
(CMRSDi st ri bution)
MSID
( NonCMRS-Di st ri bution)
MSID
( Transm
i ssion)
InterconnectorID
BMUID(CMRS)
MPAN+MSID(NonCMRS)
BMU+MSID(Di st ri bution)(CMRS)
BMU+MSID(Transmi ssion)(CMRS)
S ing le/m ultiple Input type
Formatva lidation
Lengthva lidation Value validation
M ete r S h a r e M M M M N /A M M M M Multiple Text boxF loating point(Numeric)
4 decim alplace
0 < x <= 1 or -1
B M E ID N /A M M M N /A N /A M M MMultiple(Max 10)
Text box VarcharUp to 18max
Alpha numericcharacter w ith _and -
Meter PointAdm inistratio
n Number
M N /A N /A N /A N /A N /A M N /A N /AMultiple(Max 10)
Text box Numeric 13 numeric
B M U ID N /A N / A N /A N /A N /A M N /A M MMultiple(Max 4)
Text box VarcharUp to 11max
Alpha numericcharacter w ith _and -
B ou n d a r y
M P A NN /A N / A M N /A N /A N /A M N /A N /A
Multiple(Max 10)
Text box Numeric 13 numeric
B ou n d a r y
B M U ID (M S ID )N / A M N /A M N /A N /A N /A M M
Multiple(Max 10)
Text box VarcharUp to 11m ax
Alpha numericcharacter w ith _
and -
I n te r c on n ec to r
I DN / A N / A N /A N /A M N /A N /A N /A N /A S ing le Text box Varchar Up to 10
Alpha numericcharacter w ith _and -
D istr ib u tor I D
( LD S O ID )N / A M M N /A N /A N /A M M N /A
Multiple
(Max 10)Text box Varchar Up to 4
Alpha numeric
character
L L FC I D - S V A N / A N / A M N /A N /A N /A M N /A N /AMultiple(Max 10)
Text box Varchar Up to 3Alpha numericcharacter
M S ID N /A M N /A N/A N /A N /A N /A M N /AMultiple(Max 10)
Text box Varchar Up to 13Alpha numericcharacter
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1. Metering aggregation overview (4/11)
Multiplier Information
The multiplier will be:
▪ 0.00<x< 1.00 for a shared demand circuit
▪ +1.00 for everything else (apart from non-CM generation that needs to be netted off, e.g. ineligible low
carbon generation, then it would be -1.00)
▪ Auxiliary Load must be a proportion of a HH Metered Volume (e.g. a BMU or MPAN) or separately
Metered (i.e. a Bespoke Meter)
▪ NB: Multiplier can also be referred to as the meter share – you can have between 0 to 1 for
Components where a CMU is made up of Components all behind a single Boundary Point Metering
System and the Boundary Point Metering System is being used to identify the Net Output of the CMU
Distributor ID
The distributor ID is a four character reference to identify the distributor of the Boundary Point Metering
System and is only required for Bespoke or Balancing Services Metering option
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1. Metering aggregation overview (5/11)Line Loss Factor (LLFC)
The Line Loss Factor Class (LLFC) ID is dependant on whether the CMU component connected to the Distribution
system is registered in CMRS (Central Meter Registration Service – i.e. a BMU) or SMRS (Supplier Meter Registration
Service – i.e. an MPAN
▪ CMRS (i.e. an Embedded BMU ‘E_’) is a four digit reference that identifies the central volume allocation
(CVA) Metering System and this identifies the Line Loss Factor (LLF) to be applied to Metered Volumes
▪ SMRS (i.e. an MPAN) is a three character reference that identifies the LLF to be applied to Metered
Volumes
▪ Only required for Bespoke or Balancing Services Metering Option
Boundary Point MPAN/BMU ID
▪ Only required for Bespoke or Balancing Services Metering Option that are within a site connected to a
Distribution system
▪ In CMRS (i.e. an Embedded BMU ‘E_’), the BMU ID should be used
▪ In SMRS (i.e. an MPAN), the core MPAN (13 digit number) should be used
Note: Each MPAN under a CMU should have LLFC IDs and a Meter Share
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1. Metering aggregation overview (6/11)
Metering System identifiers: CVA/BMU
CVA sites are always BM Units
▪ The Metering System identifier is a BMU ID
▪ The aggregation Rule will consist of BMU IDs
▪ There can be multiple BMU IDs making up a CMU
▪ Transmission connected BMU IDs begin with T_ and Distribution connected BMU IDs begin with E_
▪ A CMU can consist of T_ and E_ BMU IDs, for example if there is a Distribution connected Demand
circuit
▪ There can be a multiplier applied to Demand BMUs that are used by separate Generating Units in
different CMUs
▪ Any CMU that is splitting a BMU becomes a Bespoke Metering Configuration Solution and requires
a Metered entity identifier
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1. Metering aggregation overview (7/11)
Metering System identifiers: SVA/MPAN
SVA sites always have an MPAN
▪ The core MPAN is a 13 digit number
▪ An MPAN is unique to a Metering System and the direction of energy flow
▪ One Metering System (i.e. one Meter) can have an import MPAN for Active Energy import and
another MPAN for Active Energy export
▪ Components can just have an import MPAN
▪ Components can just have an export MPAN
▪ We need to know what MPANs relate to each other (i.e. the import MPAN related to the export
MPAN for the Metering System)
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1. Metering aggregation overview (8/11)
Metering System identifiers: Non-BSC
Balancing Services and Bespoke sites always have a non-BSC Metered Entity identifier (MEID)
▪ The ID is an up to 18 alphanumeric character code and should be unique to a Metering System
(and direction of energy if submitted separately)
▪ MEID is also referred to as BME ID in the EMR DB Portal
▪ One Metering System (i.e. one Meter) can have an import MEID for Active Energy import and
another MEID for Active Energy export
▪ We need to know what MEIDs relate to each other (i.e. the import MEID related to the export
MEID if submitted separately for the Metering System)
▪ The MEID must match what is used in the defined CSV file submitted and validated as part of the
Metering Test
▪ They will have a Boundary Point MPAN or BMU ID depending on whether the Boundary Point
has been registered in SMRS (SVA) or CMRS (CVA)
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1. Metering aggregation overview (9/11)
Non-BSC Metering Configuration Solution
Capacity Market Register specifies Metering option as type C for Balancing Services or type B
for Bespoke
▪ The MEID will be included in the header of the CSV file used to submit Metered Volumes to
EMRS
▪ The MEID must match what is used in the defined CSV file submitted and validated as part of the
Metering Test
▪ The Metered Volume can be submitted as a net figure or separate for AI and AE, in which case
two MEIDs would be needed
The Boundary Point MPAN or MSID (BMU ID) has to be included to validate LLF
▪ This is dependant on whether the CMU Component connected to the Distribution System is
Registered in CMRS (i.e. a BMU ID) or SMRS (i.e. an MPAN).
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1. Metering aggregation overview (10/11)
For a SMRS site:
▪ The Distributor ID can be identified from the first two digits of the Boundary Point MPAN
▪ The Line Loss Factor Class ID can be identified from the bill of the Boundary Point Metering System
▪ The Boundary Point MPAN is the core 13 digit number
For a CMRS site that is connected to a Distribution System:
▪ The Distributor ID can be found from the Licensed Distribution System Operator (LDSO) name in
the table on the next slide. The LDSO name can be confirmed by the site the Component is within
▪ The Line Loss Factor Class ID is the MSID (4 digit number) of the CVA Metering System and can be
provided by the Meter Operator for the Boundary Point Metering System the Component is within
▪ The Boundary Point MSID is the BMU ID (i.e. E_####)
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1. Metering aggregation overview (11/11)
The Distributor ID can be identified from the first two digits of the MPAN
- Distributor short code is the first two digits of the MPAN – updated
Distributor Short Code Distributor ID LDSO
10 EELC Eastern Power Networks
11 EMEB Western Power Distribution East Midlands
12 LOND London Power Networks
13 MANW SP Manweb Plc
14 MIDE Western Power Distribution West Midlands
15 NEEB Northern Powergrid (Northeast) Ltd
16 NORW Electricity North West Ltd
17 HYDE Scottish-Hydro-Electric Power Distribution Ltd
18 SPOW SP Distribution Ltd
19 SEEB South Eastern Power Networks
20 SOUT Southern Electric Power Distribution Ltd
21 SWAE Western Power Distribution (South Wales) Ltd
22 SWEB Western Power Distribution (South West) Ltd
23 YELG Northern Powergrid (Yorkshire) plc
24 IPNL Independent Power Networks Ltd
25 LENG ESP Energy Ltd
26 GUCL Energetics Electricity Ltd
27 ETCL The Electricity Network Company Ltd
28 EDFI EDF Energy (IDNO) Ltd
29 HARL Harlaxton
30 PENL Peel Electricity Network Ltd
31 UKPD UK Power Distribution Limited
32 UDNL Energy Assets Networks Limited
33 GGEN Eclipse Power Networks Ltd
34 MPDL Murphy Power Distribution Limited
35 FEAL Fulcrum Electricity Assets Ltd
36 VATT Vattenfall Networks Ltd
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2. Submission of Meter aggregation
Meter aggregation
data can be submitted
for CMU(s) during pre
qualification. This is
not mandatory,
however is required
to be updated before
the start of the
Delivery Year.
1) During CMU creation/
cloning against each
component
It is recommended that you do
not add any metering information
during your CMU creation or
cloning.
Note: If there has been changes
to an Existing CMU, you will
need to clone your CMU
2) Once the Application is
submitted via the ‘Amend
Metering Data’ button
Note: ‘Amend Metering Data’
tab will only be available once
your application has been
submitted.
The user will be able to
add/update Meter aggregation
data, which will then be sent to
the Settlement Body for review
and approval.
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3. System Overview (1/19)
Log into the EMR DB Portal at www.emrdeliverybody.com with your username and password
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3. System overview (4/19)
If creating a new CMU, select the relevant technology class from the dropdown menu
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3. System overview (5/19)
Scroll down the main page of the CMU to the ‘Classification of the CMU’ field
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3. System overview (6/19)
Choose the relevant ‘Classification of CMU’ either CMRS or Non CMRS from the dropdown menu
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3.1 System overview – Meter Configuration (1/5)
The Meter Configuration dropdown options applicable to Existing Generating CMUs
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3.1 System overview – Meter Configuration (2/5)
The Meter Configuration dropdown options applicable to New Build Generating CMUs
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3.1 System overview – Meter Configuration (3/5)
The Meter Configuration dropdown options applicable to Refurb Generating CMUs
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3.1 System overview – Meter Configuration (4/5)
The Meter Configuration dropdown options applicable to Existing, New Build and Refurb Interconnector CMUs
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3.1 System overview – Meter Configuration (5/5)
The Meter Configuration dropdown options applicable to Proven and Unproven DSR CMUs
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3. System overview (8/19)
Choose the Meter Configuration from the dropdown menu. You can also leave this section blank and submit the details
after the Application has been submitted. The details can be entered after submission using the ‘Amend Meter Data’ tab
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3. System overview (18/19)
Complete the fields in the ‘Add New Component page’ depending on which technology type you are
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3. System overview (19/19)
Once all of the fields have been completed, select ‘Save’ to save the component details. The details can also be
cancelled if any information is incorrect or you would like to restart
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4. System overview (1/4)
Log into the EMR DB Portal, click on ‘My CMUs’ and then select ‘Amend Metering Data’ on the relevant CMU to amend
the required data
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4. System overview (3/4)
Once the information has been amended, select ‘Save’ to save the CMU component changes
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4. System overview (4/4)
Select ‘Save Metering Data’ if you wish to further edit your amendments at a later stage. Select ‘Submit Metering Data’
once you are ready for DB/EMRS to review your amendments
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5. Metering Assessment overview
A New Build Generating
CMU or DSR CMU may
notify the Delivery Body
of a change of address
(sometimes referred to
as change of location)
provided that they are
Capacity Committed
(have a Capacity
Agreement Notice in
place) and meet all
eligibility criteria
What is a Metering Assessment?
During the Prequalification Application process, it is no longer a
requirement for CMUs to complete the Metering information. If Metering
information is to be entered then it must be completed in full as per the
guidance.
All CMUs that are awarded a Capacity Market Agreement will need to
complete a Metering Assessment. The Metering Assessment determines
the requirement for a Metering Test based on the metering arrangements
on site.
With the new functionality for reallocation, upon filling in the Metering
Assessment questions, Applicants will be able to see whether or not the
CMU will need a Metering Test before the assessment is submitted.
After Metering Assessments are completed via ‘My CMUs’, you will be able
to see if a Metering Test is required after completing the assessment.
Failure by a CMU to complete the Metering Assessment shall result in
Termination (CM Rule 6.10.1 (ha)).
Checklist
All assessments must
include:
- Answers for all relevant
Metering Assessment
questions
- Detailed line diagram(s)
showing electrical
configurations and Metering
sites at which the Generating
Units or DSR Components
are located or at which the
Interconnector CMU is
metered
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6. Metering Assessment deadlines
Metering Assessments during Prequalification
If CMUs would like to complete the Metering Assessment during Prequalification, this must be done within
the Prequalification submissions window, either while creating the CMU (for new or cloned CMUs) or using
the ‘EDIT AFTER PQRD’ button (for current CMUs that are being re-used). If the CMU has already
completed the Metering Assessment, the answers will be automatically populated in the Application and
the assessment will be reviewed as part of the Prequalification process.
All CMUs have the option to defer the Metering Assessment at Prequalification. The deferral period is
determined by the CMU type and Auction type.
Further Prequalification guidance for Metering Assessments will be available in version 2 of the document
which can be found here (will be published on 19th July 2019).
You can also refer to the Capacity Market Deadlines Tool here.
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7. Metering Test Certificate deadline
Not all CMU’s will require a Metering Test.
Prequalification
All CMUs entering into Prequalification have the option to upload their existing Metering Test Certificate at
the point of submitting their Application, if the CMU has not changed its configuration from a previous
Delivery Year. This must be done within the Prequalification submissions window either while creating the
CMU (for new or cloned CMUs) or using the ‘EDIT AFTER PQRD’ button (for current CMUs that are being
re-used). Please note, the Delivery Body will not review the Metering Test Certificate if the Metering
Assessment has not been completed.
All Metering Tests will be undertaken by EMRS.
Deferring the submission of a Metering Test Certificate
All CMUs have the option to defer the Metering Assessment at Prequalification (CM Rule 3.6.4(b)), and as
such, the requirement to provide a Metering Test Certificate can be deferred to a later date. The deadline is
determined by the CMU type and Auction type.
You can also refer to the Capacity Market Deadlines Tool here.
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8. Delivery Body assessment timeline
CP submits Metering
Assessment
DB has 5 Working Days to review
Approved –main admin
receives email notification
Main admin to check in EMR DB Portal under ‘MY
CMUs’ if Test Certificate is
required
Test Certificate undertaken by EMRS
If Delivery Body rejects the Metering Assessment, the main admin will receive a notification via
email. The EMR DB Portal will reopen and allow resubmissions until the relative deadline. If failure to
provide by the deadline date, this can result in the CMU being terminated as per Rule 6.10.1(a)).
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9. FAQ section
Could checks be performed on both
the MPAN and Asset number?
Can we upload all data records to
avoid email?
Checks can be performed at multiple stages of the
Component Reallocation process. While the asset number
does not form part of our checks, fields that are included are:
MPAN, BME ID and BMU IDs. Although we intend to add this
functionality by the end of this calendar year. l
I regularly experience problems with
Egress, must I use it for Component
Reallocation?
The Component Reallocation interactions between the Delivery
Body and capacity providers will be conducted using the EMR
DB Portal. This extra functionality will significantly minimise the
use of Egress.
It is now possible to upload all Metering data within the EMR
DB Portal e.g. Metering Test Certificates and single line
diagrams
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10. Contact details
EMR Delivery Body
T: 01926655300
Website
EMR Settlement Limited
T: 020 7380 4333
Website