Britain Unlocks Grid Flexibility for Surplus Power

Britain’s National Energy System Operator (NESO) has widened its Demand Flexibility Scheme to let energy providers encourage customers to use more electricity when the system has excess supply, with the change taking effect this week. Officials said the update is designed to strengthen grid resilience and reduce the loss of renewable generation that can occur when output is high but demand is low.

The revised framework was approved by regulator Ofgem last month, according to officials. Under the expanded approach, participating suppliers can offer incentives for households with smart meters to run electricity-using devices at times when renewable generation is strong and overall consumption is subdued, including periods such as sunny weekends and holidays.

NESO said eligible customers may be rewarded for shifting usage to these high-supply windows by running appliances such as washing machines and dishwashers, or by charging electric vehicles. The incentives can take different forms, including free or cheaper electricity, or points that can be exchanged for gift cards, depending on the supplier’s offer.

The scheme targets a challenge that officials said is becoming more common: electricity surpluses. The source material links that trend to rising renewable generation alongside lower summer demand, which can leave the system with more power than it can readily absorb at certain times.

In 2025, Great Britain recorded its highest renewable electricity output, with wind identified as the leading source. Solar generation also rose sharply, increasing by nearly a third compared with 2024, according to the source material. The UK also logged its sunniest year on record in 2025, which was associated with around 250,000 new rooftop solar panel installations.

Several companies have already joined the updated scheme, including British Gas, Equiwatt, and Octopus Energy. The source material notes that some participating firms already operated programs aimed at encouraging customers to use electricity outside peak periods, and the expanded NESO framework now provides a broader route to reward consumption when supply is abundant.

While the initiative is intended to reduce wasted renewable energy, the practical impact will depend on how many suppliers participate and how many households have smart meters and opt into offers. Another uncertainty is how consistently surplus periods occur across seasons and regions, which can affect how often customers are able to earn rewards.