UK heat pump throttling: what homeowners need to know
Great Britain plans to introduce remote throttling of heat pumps from late 2027 to manage peak electricity demand1. This measure is driven by the increasing electrification of heating systems, aiming to mitigate high electricity grid loads, especially during winter. Participation in heat pump throttling will be voluntary, requiring explicit consumer consent.
Thinking about UK heat pump throttling? Fuse Energy installs the Vaillant aroTHERM plus air source heat pump, with MCS and TrustMark certification and Boiler Upgrade Scheme (BUS) grants applied. Tap the quote button below to get a tailored quote.
Understanding heat pump throttling
What is remote heat pump control?
Remote heat pump control, or throttling, allows licensed providers to temporarily reduce or shift a heat pump's energy consumption. This is not a complete shutdown, but rather a way to modulate energy use to balance the electricity grid. The aim is to manage peak demand, particularly during cold spells and periods of low wind generation.
Why is it being introduced in the UK?
The UK is rapidly electrifying its heating systems, which significantly increases electricity demand. This shift creates challenges for the National Grid, especially during peak times when many households require heating simultaneously. Throttling is being introduced as a mechanism to manage these peak loads, helping to prevent grid overload and ensure stability alongside necessary infrastructure upgrades.
The regulatory landscape
Ofgem's role in heat pump regulation
Ofgem is developing a licensing system for companies that will remotely control electrical loads, including heat pumps. Regulations for this system are anticipated by the end of 2026, with the requirement to hold a licence expected to come into effect by the end of 2027 after a transition period. These measures aim to protect consumers, ensure grid stability, and safeguard digital systems.
The importance of consumer consent
A foundational principle of these new regulations is explicit consumer consent. Households must explicitly agree to any arrangement that involves temporarily reducing or shifting their energy consumption. This ensures homeowners retain control over their heating systems and are not subjected to demand-side response programmes without their clear permission.
Impact on your home and comfort
Maintaining comfort during demand-side response
Homeowners are understandably concerned about losing control over their heating and potential discomfort. However, demand-side response programmes are designed to minimise impact on comfort. For instance, heat pumps warm homes gently over longer periods, allowing for brief adjustments without a drastic drop in temperature. Pre-heating your home before a scheduled throttling event can also help maintain comfort levels.
Lessons from the EQUINOX trial
Trials like the EQUINOX project have provided valuable insights into the real-world impact of heat pump flexibility. These trials showed that 85 percent of participants noticed no change - or only a slight change - in comfort levels under normal winter conditions. This suggests that with proper management and smart controls, homeowners can participate in these programmes without significant disruption to their daily comfort.
What did the EQUINOX trial reveal about comfort?
The EQUINOX trial demonstrated that heat pump flexibility can be managed effectively without sacrificing comfort. A significant 85 percent of participants reported either no change or only a slight change in their comfort levels during demand-side response events under normal winter conditions.
Preparing your heat pump for the future
The role of smart control functions
New electric heating appliances will be required to have smart control functions by December 2027. This mandate covers heat pumps, hybrid systems, thermal storage units, and certain hot water appliances with a capacity of up to 45 kilowatts. These smart functions will enable devices to respond to signals from utility companies or flexibility service providers, allowing for energy consumption to be shifted or reduced when the grid is under strain. Homeowners will retain the ability to modify or remove any preset operating schedules.
Integrating with smart heating systems
Integrating your heat pump with a smart heating system allows for greater control and optimisation. These systems can learn your preferences and adapt to grid signals, ensuring your home remains comfortable while potentially benefiting from flexible tariffs. Fuse Energy aims to empower homeowners to understand and manage their home's energy use, aligning with evolving UK grid management.
Benefits of voluntary participation
Accessing lower tariffs
Voluntary participation in demand-side response programmes can offer financial benefits. Energy suppliers are expected to offer lower tariffs to households that consent to their heat pumps being remotely managed. By shifting energy consumption to off-peak times, when electricity is cheaper and more abundant, homeowners can reduce their energy bills.
Contributing to grid flexibility
Beyond personal savings, participating in these programmes contributes to the overall flexibility and stability of the UK's electricity grid. As more homes adopt electric heating, managing demand becomes crucial for integrating renewable energy sources and preventing blackouts. Your participation helps create a more resilient and sustainable energy system for everyone.
Addressing concerns: cybersecurity and limitations
Ensuring energy grid cybersecurity
The introduction of remote control for thousands of devices raises important cybersecurity considerations. Stricter security standards will be required for larger operators managing significant electrical loads. All providers must comply with regulations concerning operational safety and consumer protection, and devices must be capable of rejecting dangerous control signals.
Limitations during extreme cold weather
While effective under normal conditions, National Grid points out significant limitations to this type of control during particularly cold weather. During extreme frost, heat pumps require more electricity and operate for longer periods, meaning flexibility measures may only marginally reduce peak demand or simply shift consumption to a later time. Furthermore, fewer households might be willing to voluntarily throttle their heating on very cold days.
The future of UK heating electrification
Expanding grids and securing generation capacity
The UK acknowledges that remote throttling is one part of a broader strategy. The long-term vision for heating electrification also requires expanding grid infrastructure and securing sufficient generation capacity. This comprehensive approach aims to ensure a robust and reliable energy supply as the nation transitions to low-carbon heating.
Fuse Energy's vision for abundant power
Fuse Energy believes in a future with abundant power, where energy is so plentiful it stops being a constant concern. We empower homeowners with smart technology and transparent choices, helping them manage their energy use efficiently and integrate with evolving grid management. Our commitment is to future-proof heating solutions, ensuring continuous comfort and efficiency for our customers.
Thinking about UK heat pump throttling? Fuse Energy installs the Vaillant aroTHERM plus air source heat pump, with MCS and TrustMark certification and BUS grants applied. Tap the quote button below to get a tailored quote.
For the avoidance of doubt, this article is provided for informational purposes only and is not intended to constitute legal or financial advice. The author and/or Fuse Energy shall not be responsible for any losses arising out of any reliance on the information contained herein.
