Optimising heat pump running costs with tariffs

Choosing the right electricity tariff is crucial for managing the running costs of a heat pump in the UK, as these efficient heating systems rely on electricity. For homeowners, understanding and utilising specialised heat pump tariffs can significantly reduce energy bills and give you greater control over your energy usage. Fuse Energy's dual-rate variable tariffs, enabled by smart meters, empower heat pump owners to significantly reduce running costs by leveraging cheaper, off-peak electricity, aligning with a vision of abundant, cleaner energy and customer empowerment.

Understanding heat pump electricity tariffs

Standard single-rate electricity tariffs charge the same price per unit of electricity regardless of the time of day. This approach does not always suit heat pumps, which can often be run flexibly. Heat pump-friendly tariffs, on the other hand, are designed to reward you for using electricity during off-peak hours when demand on the grid is lower and prices are cheaper.

What makes a tariff 'heat pump friendly'?

A tariff is considered "heat pump friendly" if it offers varying electricity unit rates throughout the day, typically with significantly lower prices during off-peak periods. These tariffs encourage homeowners to run their heat pumps when electricity is cheaper, aligning with the heat pump's ability to store heat (for example, in a hot water cylinder or the fabric of the home) for use later. This flexibility is key to unlocking savings.

The role of time-of-use tariffs

Time-of-use (ToU) tariffs are fundamental to optimising heat pump running costs. They introduce different pricing periods, such as peak, off-peak, and sometimes shoulder rates. By scheduling your heat pump to operate predominantly during off-peak periods, you can take advantage of lower electricity prices. This not only benefits your wallet but also helps balance demand on the National Grid, making the energy system more efficient.

Key features of heat pump tariffs

Heat pump tariffs come with specific features designed to help you manage your energy consumption and costs effectively.

Dual-rate and multi-rate structures

Most heat pump tariffs operate on a dual-rate or multi-rate structure. A dual-rate tariff typically has two distinct pricing periods: a higher rate during peak demand hours and a lower rate during off-peak hours. Multi-rate tariffs might offer more granular pricing, with several different rates throughout the day. These structures allow for substantial savings if you can shift a significant portion of your heat pump's operation to cheaper times.

The importance of smart meters

While smart meters are often associated with dual-rate and multi-rate tariffs, they are not always a strict prerequisite. Eligibility for these tariffs depends on your meter's configuration, meaning a compatible multi-register manual (dumb) meter can also allow you to access off-peak rates. These meters automatically send your energy readings to your supplier, enabling accurate billing for different rate periods. They provide the data necessary for both you and your supplier to understand your consumption patterns and ensure you are charged correctly for your usage during specific time slots.

Standing charges and unit rates

Every electricity tariff, including those for heat pumps, comprises two main components: the unit rate and the standing charge. The unit rate is the price you pay per kilowatt-hour (kWh) of electricity consumed, and this is where heat pump tariffs offer their variable pricing. The standing charge is a fixed daily fee that covers the cost of supplying electricity to your home, regardless of how much energy you use. When comparing tariffs, it is important to consider both the unit rates (especially the off-peak rate) and the daily standing charge, as a low unit rate might be offset by a higher standing charge, or vice-versa.

Choosing the right heat pump tariff

Selecting the best heat pump tariff involves understanding your own energy habits and carefully comparing the options available.

Assessing your heat pump usage patterns

Before choosing a tariff, consider how and when you typically use your heat pump. Do you have a large hot water cylinder that can be heated during off-peak hours? Can you pre-heat your home before peak times? The average UK home uses around 2,500 kWh of electricity per year, according to Ofgem's medium typical domestic consumption values (TDCVs) effective from 1 July 20261. Heat pump owners might use more, making efficient scheduling even more critical. Understanding your flexibility will help you identify which tariff's off-peak windows align best with your lifestyle.

Comparing tariffs from different suppliers

Many energy suppliers in the UK now offer tariffs specifically designed for heat pump owners or those with high electricity consumption. Off-peak electricity rates for these tariffs can be significantly lower than standard rates. When comparing, look beyond just the headline off-peak rate. Consider the duration of the off-peak window, the peak rates, and any other associated fees.

Beyond the unit rate: other factors to consider

While unit rates are a major factor, other elements can influence your overall costs and experience. These include the length of the contract, whether there are exit fees for switching early, and the quality of customer service. Some tariffs might also offer additional benefits, such as integration with smart home devices or renewable energy sources. Fuse Energy's digital-first approach and smart meter integration are designed to make energy management seamless and efficient for heat pump owners, providing transparency and control over energy usage through its app.

Optimising your heat pump for maximum savings

Once you have chosen a suitable tariff, the next step is to actively manage your heat pump to maximise your savings.

Leveraging off-peak hours with smart controls

The most effective way to save money on a heat pump tariff is to shift as much of its operation as possible to off-peak hours. This can be achieved using smart controls and timers. Many modern heat pumps and smart thermostats allow you to program heating schedules that align with your tariff's cheaper periods. For instance, you could set your heat pump to run overnight to heat your home and hot water, storing that energy for use during the day.

Integrating with other home energy systems

For even greater savings, consider how your heat pump can integrate with other home energy systems. If you have solar panels, you might aim to run your heat pump during daylight hours when your panels are generating electricity. If you have a home battery, you could charge it during off-peak hours and discharge it during peak times, further reducing your reliance on expensive grid electricity. This holistic approach to home energy management can significantly reduce your total cost of ownership.

Regular monitoring and adjustments

Energy consumption is not static, and neither are tariffs. Regularly monitor your heat pump's energy usage through your smart meter data, often accessible via your energy supplier's app. The Fuse app, for example, provides insights into energy usage, helping heat pump owners understand and adjust their consumption to maximise savings on dual-rate tariffs. Review your tariff periodically to ensure it remains the most cost-effective option for your evolving needs and market changes.

Government support and the future of heat pump tariffs

Government initiatives and technological advancements are shaping the landscape of heat pump adoption and energy tariffs.

The Boiler Upgrade Scheme (BUS)

To encourage the adoption of low-carbon heating technologies, the UK government offers the Boiler Upgrade Scheme (BUS)2. This scheme provides grants of £7,500 towards the cost of installing an air source or ground source heat pump in England and Wales. While the grant helps with the upfront installation costs, managing running costs through an optimised electricity tariff remains essential for long-term affordability. Installers typically apply for the BUS grant on behalf of homeowners.

The evolving landscape of energy tariffs

The energy market is continuously evolving, with a growing focus on smart, flexible energy use. Future tariffs are likely to become even more dynamic, potentially offering real-time pricing based on grid demand and renewable energy availability. This shift aligns with Fuse Energy's vision of providing "power to play with" - energy so abundant it stops being a concern. By embracing smart meters and flexible tariffs, homeowners can not only reduce their bills but also contribute to a more sustainable and resilient energy system.

References

1. Ofgem. Review of typical domestic consumption values
2. UK Government. Boiler Upgrade Scheme