Becoming a Generator

This page lists and details the step-by-step process of becoming an electricity Generator. You will also learn about what qualifications are needed, the relevant costs and charges and any other information you may need to know.

What is a Generator? 

Generators generate electricity. Generators then sell this energy to Suppliers and to other Trading Parties in the market.

Generators own/operate the plant and apparatus used to produce the electricity and are responsible for the Meters that record the amount of electricity that they produce and consume.

Video on the Generator Market Entry Process

This video explains the process for entering the energy market as a Generator.

Video Published: October 2021
Video Length: 10 mins, 54 sec


Qualifications needed

In order to qualify as a Generator you will need to obtain the following qualifications:

The CVA Qualification is needed to prove that Generators have the ability to send certain communications to BSC Agents and ensure that certain communications are received. 


Generators acceding to the BSC must pay a £500 accession fee which covers the administrative costs of entering the market.

Once acceded, a flat monthly fee of £250 + VAT applies. This is known as a base monthly charge. 

Credit cover

Charges are made to Parties (or by them) as a result of any imbalance (Trading Charges) 29 days after a Settlement Day. Over this period a Parties’ Credit Cover ensures it has enough collateral to
cover these payments in case of default.

We do not specify the amount of Credit Cover you must lodge; it is up to the Party to decide. Parties usually make this decision based on their trading characteristics.

For more information on Credit Cover please refer to the Overview of Credit Cover or email [email protected]

Other costs

CVA Metering charge – £ 50

Generators have to pay a charge per Registered CVA Metering System (including those at a Systems Connection Point) for which it has been the Registrant at any point in the month.

CVA BM Unit Charge – £0 (was £100)

A charge is made against every CVA BM Unit for which the Generator is the Lead Party for all or part of the month. If the BM Unit is a Production BM Unit at an Export Exempt site where there are also one or more Consumption BM Units, then no charge is made.

If there are Production BM Units at an Export Exempt site, where there are no Consumption BM Units, then one charge is made for all BM Units at that site.

Notified Volume Charge – £0.0005/MWh

A charge is also payable against a Generator’s Gross Contract Volume.

Participant Test Service charges

For parties wanting to test/re-test any flows you can use the PTS service to increase the level of assurance to individual companies, and to the industry as a whole.

The service can be used before competing CVA Qualification testing and operating in the live environment, and to test any impacts as a result of changes to your business software.

The PTS service is booked in half day test slots (9am-1pm/1-5pm) and is charged at £999+VAT per test slot

To book a PTS test slot please submit a completed PTS Booking Form to the BSC Service Desk.

Steps needed to become a Generator 

You will need to go through various steps in order to register as a Generator. The diagram below lists all the tasks required.

Within the individual steps there are forms that need to be completed and details about financial transactions that need to take place. You can also use the Elexon Kinnect Customer Solution, where you will be directed to all the relevant steps needed to become an Generator. Elexon Kinnect is a self-service gateway that offers a guided and streamlined market entry process.

Join the BSC

Join the BSC

Sign the BSC Agreement

Sign the BSC Agreement

The first stage of the Market Entry process is to become a BSC Party. This is done by signing the BSC Accession Agreement, which is a contract between Elexon and the applicant. On signing the Accession Agreement the applicant is agreeing to abide by the rules and obligations set out within the BSC.

Applicants must also pay a one off £500 application fee and be aware that on becoming a BSC Party all parties start paying the monthly membership fees of £250+VAT.

Section A of the BSC lists the requirements you will need to fulfil to become a BSC Party.

What do I need to do?

  1. Complete and sign an original copy of the BSC Accession Agreement. The agreement should be signed by the registered company director but not dated. Once we receive the agreements we will date and countersign them before returning one back to you.

    Send the signed agreements to: [email protected].

  2. Complete the Accession Form and send to Market Entry ([email protected]). This is to provide us with the details required to support you through the Market Entry process.
  3. Send the £500 Application Fee – This can be paid by Cheque/BACS or CHAPS.

BACS/CHAPS payments can be made using Elexon’s details as follows:
​Account Name: Elexon Ltd
Account Number: 60115819
Sort Code: 20-00-00
Bank: Barclays Bank Plc
Branch: 1 Churchill Place, London, E14 5HP

Please note that the above bank account is for Elexon charges only and is separate to the two bank accounts used by the Funds Administration Agent (FAA) for Trading Charges and Credit Cover. For more information on Elexon charges please see the BSC Costs & Charges webpage.

Order comms lines

Order comms lines

As a party operating within the BSC arrangements you will need to be able to send and receive communications to and from Elexon and the BSC Agent systems.

Communication methods

Some communications are manual (via fax, post and email) but most are sent via electronic data flows. The electronic data flows are sent and received via 2 communication methods, the High Grade Service and the Low Grade Service.

The High Grade Service

This provides access to all services and data through private network communication. For the BMRA service, the High Grade Services provides the capability for 24 hours a day, 7 days a week near real time information to be ‘pushed’ to the service users.

Users of the High Grade service can access this data either through browser screens (using Service Provider supplied applets to refresh the screens on receipt of updates), or through a defined programmatic interface (using TIBCO software) (BMRS data only).

The Low Grade Service

This provides access to all services and data through the public internet, with consequently no guarantees on access times or availability. The Low Grade Service provides access to BMRA data through a browser, but without the automatic refresh, the users are responsible for ‘pulling’ the data for screen based access and file downloads.

How much does it cost and how long does it take to order?

The Low Grade Service is free of charge for all Parties and takes Elexon around 5WDs to process your request. For more information on what is required please look at the Communications Requirement Document.

The charges for the High Grade Service depend on the type of line you require and whether you require a disaster recovery line and TIBCO Software. The current charges can be found within the Schedule of specified communications charges. High Grade Lines in the UK take around 60WDs to install from the point of order, the time taken to install HG lines in Europe is dependent on the exact location and can be discussed at the point of order.

What do I need to do?

Place a Communication Line Request . Once you have decided which service you require you will need to place an order with Elexon.
For a more detailed view of setting up communication lines, please refer to the Communication Line process diagram.

Set up Authorised Persons

Set up Authorised Persons

Authorised Persons need to be created to ensure that we are aware of who within your company is authorised to carry out specific BSC activities. Further information regarding Authorised Persons and the different levels of authorisations can be found in BSCP38.

What do I need to do?

Submit a letter from the company director nominating an initial category A Authorised Person. The letter must be on a company headed paper.

Submit a BSCP38/5.1 form and the letter to Market Entry ([email protected]). Both Part A and C must be completed by the person nominated within the director’s letter. For each additional person being authorised you will need to complete part C.

Please note that a Category ‘A’ Authorised Signatory can act on behalf of all categories. Unless there is a specific person you would like to authorise for a specific category, then please only tick A.

Book CVA Qualification test

Book CVA Qualification test

All BSC Parties must demonstrate their ability to communicate with BSC Central Systems and comply with the requirements in Section O of the BSC by completing CVA Qualification Testing as part of the Market Entry process.
For more information on CVA Qualification testing please refer to the links below:

What do I need to do?

You will also need to refer to the CVA Qualification Checklist within BSCP70 to ensure you are prepared for testing and have the necessary validation software and business systems in place before arranging a test date.

Once you’re ready to carry out testing please complete the relevant test booking forms in BSCP70 and submit to Market Entry ([email protected]) along with a date you would like the testing to take place (10 WD lead time).

N.B You are able to opt out of testing some or all of the required data flows and will need to specify this within the BSCP70 form, choosing to opt out of testing all or some of the data flows is done at the Party’s own risk. If you are qualifying as an ECVNA or MVRNA then testing is mandatory.

For a more detailed view of setting up communication lines, please refer to the CVA Qualification Testing diagram.

Lodge credit cover (optional)

Lodge credit cover (optional)

Trading Charge payments are made to or by Parties 29 days after a Settlement Day. Credit Cover ensures that Elexon has enough collateral from you to cover these payments if you cannot make them. For further information on Credit Cover please refer to the Credit Cover Guidance Document. If you have any queries regarding Credit Cover please email them to [email protected]

What do I need to do?

To lodge Cash Credit cover

You will need to provide the credit cover to the Funds Administration Agent (FAA) which will be held in the reserve account:

Barclays Bank Plc.
Sort Code: 20-00-00
Beneficiary Account Name: Elexon Clear Limited.
Reserve Account
Beneficiary Account Number: 00256269
IBAN: IBAN GB96 BARC 2000 0000 2562 69

Please contact the FAA via the BSC Service Desk prior to lodging credit.

Please note that the above bank account is for lodging Credit Cover only and is separate to the two bank accounts used to pay BSC Charges and Trading Charges.

To provide Credit Cover by a letter of credit

The templates that can be used to form the letter of credit can be found in Annex M-1, M-2 & M-3 of the BSC. The letter of credit must be issued from a Bank with a credit rating of ‘A’ or greater and must be valid for a minimum of 3 months.

Submit funds accession details

Submit funds accession details

The Funds Administration Agent (FAA) manage the funds transfer between Elexon and BSC Parties for any Trading Charges owed to or by BSC Parties during the Balancing & Settlement of the market. The FAA will require some company financial details from you to ensure they are ready to be able to invoice you for any Trading Charges owed or payable after go-live.

Please note that the FAA bank account from which you receive/to which you pay Trading Charges is separate to the two bank accounts in to which you pay BSC Charges and lodge Credit Cover.

What do I need to do?

Submit a BSCP301/04(a) to Market Entry ([email protected]). This should be done at least 10WD before you intend to register in Central Systems.

For further guidance on the Funds Accession Form please see our Funds Accession Form Guidance Note.

Submit credit contacts

Submit credit contacts

Before completing the market entry process all new parties are required to provide Elexon with 2 out of hours contacts in case an urgent issue arises out of normal working hours (e.g., Credit cover breaches etc)

What do I need to do?

Provide two contacts. Please complete the Operational contact spreadsheet.

​Submit by email to Market Entry ([email protected]) at least 2WDs prior to registering in Central Systems.

Register Party role

Register Party role

Before you can start trading you will need to register your Parties details within BSC Central Systems.

The registration process can be found in detail within BSCP65.

What do I need to do?

Complete a BSCP65/01.

Submit to Market Entry ([email protected]) at least 3WDs prior to the party registration date.

Register Party Agent role (optional)

Register Party Agent role (optional)

Before you can start operating as a CVA Party Agent you will need to register your CVA Party Agent details within BSC Central Systems.

The registration process can be found in detail within BSCP71.

What do I need to do?

Complete a BSCP71/05.

Submit to Market Entry ([email protected]) at least 2WDs prior to the party registration date.

N.B. You will only be able to register a Party Agent role if you have completed the necessary CVA Qualification Testing.

Register Generation BM units

Register Generation BM units

BM Units are the units used to represent all energy export and import in Settlement. There are specific BM Units assigned to each Party and we sum up their volumes and contracts, for each Party, when we carry out the Settlement calculations. For further information on BM Units please read the BM Unit Information Sheet.

Generators will be required to register BM Units & associated Meters in accordance with Section K of the BSC.

What do I need to do?

At least 30 WDs prior to your BM Unit registration date you will need to submit the following forms to provide the details required to register your BM Units & associated Metering Systems.

All forms and any queries should be sent to Market Entry ([email protected]).

  • BSCP15/4.1 BM Unit Registration Form
  • BSCP20/4.1 form to register any associated metering systems
  • BSCP20/4.3 to provide the Meter Technical Details (MTDs) for the new Metering Systems (provided by the CVA MOA appointed by you)
  • BSCP75/4.2 to provide aggregation rules for the new metering systems
  • Site diagrams that have been pre approved by National Grid

All forms can be found in the relevant BSCPs.

Go Live

Go Live

Getting started

The first thing to do is formally register your intent to become a Generator. You can do this by completing an expression of interest form. If you would like a meeting to discuss any further questions you have please state your availability in the expression of interest form, and we will arrange a meeting with you to discuss your questions or alternatively please send us an email with your questions to [email protected].

After the meeting you will be issued with an Elexon Kinnect login. From there you can start to go through the market entry process. 


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