Unlocking Domestic Flexibility at Scale

How P483 and AMVLP Qualification Enable a New Era of Device-Led Flexibility

On 27 November 2025, Elexon’s Modification P483 went live, representing a fundamental shift in how domestic and small business flexibility can participate in Great Britain’s electricity markets. EDF Wholesale Market Services has now qualified as an Asset Metering Virtual Lead Party (AMVLP), enabling us to support domestic and small business flexibility at scale using device-level metering.

This marks a step change for the market. Long-standing regulatory barriers have been removed, access to flexibility services has expanded beyond traditional supply relationships, and new opportunities have opened up for technology providers, partners and customers.

What P483 Changes and Why It Matters

Historically, participation in flexibility markets required customers to be half-hourly settled at the site boundary meter. In practice, this excluded the majority of domestic and small business sites, even where flexible assets such as EV chargers or batteries were already in place.

P483 removes this constraint.

Under the new framework, flexibility can be measured directly at the asset level. Metering embedded within devices such as EV chargers, batteries or other controllable technologies can now be used to evidence flexibility delivery.

As a result:

• Participation is no longer dependent on half-hourly settlement at the site boundary
• Customers do not need to be supplied by the route-to-market provider
• Device owners and technology partners can access markets more directly

In simple terms, flexibility is now defined by what the device can do, not how the site is settled.

Why Domestic Flexibility Is Critical to the Future System

Domestic flexibility will play a central role in delivering a cost-effective, resilient and low-carbon electricity system.

As electrification accelerates across transport, heating and distributed generation, system value increasingly depends on when and how electricity is used, not simply how much is generated. Flexible demand from homes and small businesses provides a powerful mechanism to manage demand peaks, reduce network constraints and integrate renewable generation more efficiently.

P483 enables this by unlocking:

A materially larger flexibility pool
Millions of domestic and small business assets can now participate, moving beyond early-adopter segments.

Higher-quality operational data
Asset-level metering improves accuracy, verification and transparency, supporting robust market participation.

Faster commercialisation
Value can be realised without waiting for wider settlement reform or meter upgrades.

Lower system costs
Greater access to demand-side response reduces reliance on costly balancing actions and improves overall system efficiency.

What EDF’s AMVLP Qualification Enables

EDF’s qualification as an AMVLP is not simply a regulatory milestone. It reflects the technical, operational and governance capabilities required to operate asset-metered flexibility reliably at scale.

As a qualified AMVLP, we can:

Register and manage asset meters
Participating devices are assigned an Asset Metering System ID (AMSID), enabling accurate measurement, validation and settlement of flexibility volumes. We work with appointed agents to obtain and relay metered data to central settlement systems, enabling compliant market access.

Route flexibility into multiple markets
Asset-level flexibility can be traded in the wholesale market through our Virtual Trading Party capability, with Balancing Mechanism participation enabled via our Virtual Lead Party role. EDF also participates in DSO services markets and the Capacity Market.

Support partners at scale
Technology providers, OEMs, installers and service partners can integrate with our PowerShift virtual power plant to bring large volumes of domestic flexibility to market efficiently.

Create value for customers
Customers benefit from optimised asset operation, access to market revenues and participation in flexibility services regardless of their electricity supplier.

Built on PowerShift and Proven Market Capability

Our AMVLP capability is underpinned by PowerShift, EDF’s flexibility platform designed to connect distributed assets to electricity markets securely and at scale.

Combined with our established expertise across Wholesale Market Services, including trading, optimisation, settlement and operational delivery, this allows us to manage complexity on behalf of customers and partners while ensuring flexibility is delivered reliably, compliantly and in a way that supports long-term system value.

A Platform for Partnership

P483 creates a new commercial landscape for domestic flexibility. Success now depends on effective collaboration between technology providers, asset owners and market operators.

We are actively engaging with:

• EV charging manufacturers and software providers
• Home battery and energy management system providers
• Installers and service partners
• Aggregators and technology platforms seeking market access

Our focus is on building scalable, partner-friendly routes to market that combine technical rigour with commercial simplicity.

What Happens Next

We are progressing partner onboarding and asset integration under the AMVLP framework, including:

• Registering asset meters and establishing data flows
• Integrating devices into optimisation and trading systems
• Preparing wholesale market participation at scale
• Completing readiness for Balancing Mechanism participation
• Ensuring full compliance, transparency and auditability

As volumes grow, domestic flexibility will become an increasingly important contributor to system balance, customer value and decarbonisation outcomes.

Conclusion

Modification P483 fundamentally changes how domestic and small business flexibility can participate in Great Britain’s electricity markets. With AMVLP qualification in place, EDF Wholesale Market Services is positioned to support customers and partners across the full flexibility value chain, from device integration through to market participation.

For technology providers, installers and partners looking to scale domestic flexibility, this represents a clear opportunity to work with an experienced market participant that understands both the technical and commercial realities of operating at scale.

If you are interested in partnering with us or exploring how your assets or technology can participate in flexibility markets, our team would welcome the conversation.