P379 ‘Multiple Suppliers through Meter Splitting’

Formal title: Enabling consumers to buy and sell electricity from/to multiple providers through Meter Splitting

This Modification will enable consumers to be supplied by multiple Suppliers through Balancing and Settlement Code (BSC) Settlement Meters at the Boundary Point. P379 will allow multiple Suppliers to compete for the supply or export of electricity through a single Meter without needing to establish an agreement between all of the Suppliers involved for every instance.

P379 aims to address a significant barrier to competition in the market rules whereby multiple Suppliers are unable to compete for behind-the-meter energy volumes, measured via the same boundary Metering System. Whilst the existing SVA Shared Metering Arrangements do facilitate splitting of boundary Metered volumes between different Suppliers, these arrangements are restrictive, for example they require agreements in advance between the Suppliers. The Proposer believes that the existing arrangements don’t adequately facilitate the development of local energy markets and supply innovation, and effectively mean there is a monopoly of one Party, the ‘default’ or ‘Primary’ Supplier, over a consumer’s energy volumes behind a Settlement Meter at any given time, restricting competition and innovation.

Modification Withdrawal

On Tuesday 2 March 2021, the P379 proposer, GridBeyond notified Elexon that it wishes to withdraw P379 from the BSC change process. 

Even though the Proposer believes allowing multiple Suppliers can provide additional benefits, the cost of implementing this Modification is much higher than expected.

They believe some of the desired outcomes are already covered under BSC Modifications P375 ‘Metering behind the Boundary Point’, P376 ‘Utilising a Baselining Methodology to set Physical Notifications’ and P415 ‘Facilitating access to wholesale markets for flexibility dispatched by Virtual Lead Parties’, and hence given the very high cost of implementing P379, the added value cannot be justified.

Next Steps

  • As per BSC Section F ‘Change Management’, Section 2.1.12B, P379 is subject to a period where the withdrawn Modification Proposal shall remain open to be adopted by a BSC Party for a period commencing at 12:00 hours on the first Business Day after the date of the notice to withdraw the Modification. This period will lapse at 12:00 hours on the fifth Business Day after. Once this period has concluded without adoption, the Modification will be officially closed.
    • Therefore, Modification P379 will officially close at 12:00 on Wednesday, 10 March 2021, unless adopted.
  • The Cost Benefit Analysis conducted by CEPA on behalf of Elexon and the BSC Panel, is in its final stages and due to be published in late March. 
    • The slides presented by CEPA to February’s BSC Panel can be found under Documents in the Assessment Procedure are of this webpage.

Next Workgroup

The P379 Workgroup scheduled for 19 March 2021 between 09:30 and 16:00 has now been cancelled. If a BSC Party comes forward to adopt the Modification we will look to rearrange the next Workgroup in due course.

The collated responses to the Cost Benefit Analysis consultation are now available in the Assessment Procedure section below.

Downloading documents

If you have any problems or issues downloading or accessing any of the supporting documents on this page then please contact the highlighted Lead Analyst.

Current Status

Initial Written Assessment
Assessment Procedure
Report Phase
With Authority
Awaiting Implementation


Click on the X next to any of the icons to replace them with a short-cut link to the page you are currently on or search for a specific page.

List of BSC Insights

Previous Circulars

BSC training services

Market Entry

Charge Codes and Switch Regimes

Add New