P442 might sound like something straight out of Star Wars, but it’s one of the most important changes to the UK electricity settlement system. It is a modification to the Balancing and Settlement Code (BSC). It ensures licence-exempt electricity suppliers, such as solar farms and community energy schemes, are properly recognised within the energy market. It does this by excluding them from the levy calculation applied to licensed suppliers. This levels the playing field, helping smaller generators compete with large utilities. In practical terms, small-scale renewable generators can now sell electricity directly to customers. This cuts costs and makes the energy market more flexible. The result is a market that better supports long-term sustainability goals.

Why has P442 come into place?

For years, the UK's electricity settlement system was built around large, licensed suppliers. It was a model that worked well for a while, but as the energy landscape evolved and decentralised renewable generators began to emerge, the system struggled to keep up. The energy market was unable to distinguish between electricity supplied through a licensed supplier and electricity supplied under licence-exempt arrangements. As a result, local renewable energy projects frequently missed out on opportunities to supply power to businesses actively seeking greener sources. P442 essentially formalised exempt supply, which refers to energy supply that is not subject to the same taxes, levies, and regulatory requirements that apply to standard licensed suppliers. This was introduced to remove barriers that would otherwise make things overly complex for smaller energy generators, while still keeping them within the wider market framework.

P442 introduced a new settlement role, the Exempt Supply Notification Agent (ESNA). Its job it is to clearly identify which electricity volumes are exempt and ensuring they are settled correctly, rather than being inadvertently captured within licensed supply calculations. The company’s Powertraces platform is designed to automate the complex task of fine-grained energy  matching, providing real-time tracking of supply and demand from multiple sites. This brings a level of structure that was previously missing, making direct supply arrangements between generators and businesses far more practical.

What generators stand to benefit?

To qualify under P442, smaller projects must be time-matched and meet a sub-5MW threshold. Within those parameters, a broad range of smaller-scale and decentralised renewable generators are well-positioned benefits. Likely beneficiaries include:

  • Smaller solar, onshore wind, hydro, and anaerobic digestion plants
  • Commercial rooftop solar installations
  • Community energy schemes
  • Private-wire and embedded generation sites.

This model has not been untested. Similar approaches have already been implemented in Australia, Singapore and Italy, demonstrating that time-matched supply and settlement can work effectively at scale. In Sydney, for example, EG funds introduced a Matched Energy Supply Agreement (MESA), time-matching output from regional solar farms to businesses every 30 minutes. As a result, EG now meets up to 85% of its energy use with time-matched renewables, at lower costs than standard tariffs. It is a compelling example of what becomes possible when the right framework is in place.

A net-positive for the environment

P442 represents a meaningful step forward for sustainability and the transition to a cleaner energy system. P442 improves how locally generated renewable electricity is recognised within the market. This gives businesses a practical alternative to relying entirely on the centralised grid, where prices are heavily swayed by volatile global energy markets. Instead, businesses can now easily source electricity from local renewable generators. This gives businesses greater control over their energy costs. It also strengthens the commercial viability of local renewable projects by improving returns for generators operating under licence-exempt arrangements. When generators are better rewarded, investment in new renewable projects follows. Over the long term, this supports the development of a more resilient, decentralised energy system. It is one that is less exposed to global market pressures, reduces demand on the national grid, and accelerates progress towards national sustainability goals.

Why P442 matters to energy buyers

P442 does more than simply make green energy more practical, it also makes it more affordable. P442 improves the way licence-exempt electricity suppliers are recognised within the settlement system. As a result, businesses can buy power directly from local renewable generators at more competitive prices than traditional grid-supplied electricity. This matters because an energy bill is made up of far more than just the cost of the electricity itself. Businesses typically pay for a range of Non-Commodity Costs (NCCs), including network charges, levies, and policy-related costs that are applied through licensed electricity supply arrangements. Under P442, businesses using direct supply arrangements can avoid several of these market levies. Generators and their customers could see reductions of up to £60/MWh on their contracts.

For businesses facing sustained pressure from rising energy costs, that is significant savings. Even relatively small improvements in cost allocation can have a meaningful impact on long-term budgets, making P442 not just an environmental win, but a commercial one too.