Is electricity cheaper at night?

Yes, electricity can be significantly cheaper at night in the UK, but only if you are on a specific type of energy tariff designed for off-peak usage. These tariffs, often called time-of-use or dual-rate tariffs, offer lower unit rates during periods of reduced demand on the National Grid, typically overnight.

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Understanding off-peak electricity

Off-peak electricity is not a universal benefit; it is a pricing structure offered by energy suppliers to encourage consumers to shift their energy consumption away from busy periods. This strategy helps balance the grid and can lead to noticeable savings for households willing to adapt their routines.

Why are electricity rates cheaper at night?

Electricity rates are cheaper at night primarily due to lower demand on the National Grid. During the day, homes and businesses are highly active, leading to peak demand. Overnight, this demand drops considerably. Energy suppliers can then offer lower rates because there is less strain on the infrastructure. Additionally, there is often higher renewable energy generation from sources like wind farms during these hours, which can also contribute to lower wholesale electricity prices.

What are typical off-peak hours in the UK?

Off-peak hours in the UK vary significantly by supplier and the specific time-of-use tariff you are on. For instance, some tariffs might offer a seven-hour window, while others could provide a longer or shorter period. It is crucial to check the precise timings specified in your tariff's terms and conditions to ensure you are using electricity during the cheaper periods.

How time-of-use tariffs work

Time-of-use tariffs are designed to reflect the fluctuating cost of electricity throughout the day. Instead of a single unit rate, you pay different rates depending on when you use electricity.

Dual-rate tariffs: Economy 7 and other options

Dual-rate tariffs, such as the well-known Economy 7, provide two distinct unit rates: a higher rate for peak daytime usage and a lower rate for off-peak night-time usage. While Economy 7 has been a long-standing option, modern energy suppliers are increasingly introducing more dynamic time-of-use tariffs. These newer tariffs can offer more flexible off-peak windows or even multiple pricing tiers throughout the day, moving beyond the traditional two-rate structure. Ofgem encourages suppliers to offer tariff choices that help households use energy more flexibly.

The role of smart meters in accessing cheaper rates

Smart meters are generally required for most modern time-of-use tariffs, as they enable automatic meter readings and dynamic pricing. Without a smart meter, it is often impossible for suppliers to accurately track your consumption during different pricing periods. The Radio Teleswitch Service (RTS), a legacy system that historically switched between peak and off-peak rates for some older meters, is being phased out across the UK. The industry-wide switch-off began on 30 June 2025. This means customers with RTS meters will need to have them replaced with smart meters by their current supplier to continue benefiting from off-peak rates.

Benefits and potential savings

Shifting your electricity usage to off-peak hours can lead to noticeable reductions in your energy bills.

How much can you save by shifting usage?

Off-peak electricity rates can be significantly lower than peak rates, depending on the tariff and supplier. While specific savings cannot be guaranteed due to individual usage patterns, a typical UK home uses around 2,500 kWh of electricity per year. By strategically moving a substantial portion of this usage to cheaper night-time hours, households can make a tangible difference to their annual energy expenditure.

Ideal appliances for off-peak use

Appliances that consume a lot of electricity and can be run unattended are ideal candidates for off-peak use. These typically include:

• Washing machines and tumble dryers: Schedule cycles to run overnight.
• Dishwashers: Load them up after dinner and set a timer.
• Electric vehicle (EV) charging: Charging an EV overnight can be one of the biggest savings opportunities, as EVs consume a significant amount of electricity. For Fuse Energy customers, the dual-rate variable tariff is recommended for EV charging.
• Storage heaters: These are designed to charge up during off-peak hours and release heat throughout the day.
• Immersion heaters: If you have an electric hot water tank, heating water overnight can be much cheaper.

Making the switch to an off-peak tariff

Switching to a time-of-use tariff requires a few steps to ensure it is the right move for your household.

Checking your meter and eligibility

Before anything else, check your current electricity tariff and meter type. Most modern time-of-use tariffs require a smart meter for accurate billing and to enable the different rates. If you have an older, non-smart meter, especially one that relied on RTS, your current supplier will need to replace it with a smart meter. This upgrade is usually free.

Finding the right tariff for your home

Once you know your meter type, research available time-of-use tariffs from different energy suppliers. Evaluate your household's ability to shift significant electricity usage to off-peak hours. If you can consistently run high-usage appliances overnight, an off-peak tariff could be beneficial. If you do not already have one, consider getting a smart meter installed, as they are often essential for accessing the most dynamic and beneficial off-peak tariffs. Finally, switch to a suitable off-peak tariff that aligns with your consumption habits and potential for savings.

Maximising your off-peak savings

Simply switching to an off-peak tariff is not enough; active management of your energy usage is key to unlocking the full benefits.

Practical tips for shifting energy consumption

To truly maximise your off-peak savings, you need to actively monitor and shift your energy consumption. Use timers on appliances like washing machines, dishwashers, and EV chargers to ensure they only operate during the cheaper night-time hours. Consider pre-heating your home or water during the off-peak window if you have electric heating or an immersion heater. The goal is to make a "power play" by using more energy when it is abundant and cheap, rather than rationing it during expensive peak times.

Monitoring your usage with the Fuse app

The Fuse app provides real-time data and insights, helping you understand your usage patterns and effectively manage your energy consumption during off-peak hours. This transparency empowers you to make informed decisions about when to use your appliances, ensuring you are always taking advantage of the lowest rates. Fuse also offers 24/7 human customer support to help you understand and navigate complex off-peak tariffs, ensuring you fully benefit from cheaper night-time electricity.

Addressing common questions

Is all electricity cheaper at night?

No, not all electricity is cheaper at night. Electricity is only cheaper at night if you are on a specific time-of-use tariff that offers dual rates, such as an Economy 7 or a modern smart meter tariff. If you are on a standard single-rate tariff, the price per unit of electricity remains the same regardless of the time of day. It is essential to check your specific energy contract to understand your rates.

What if I have an older meter type?

If you have an older meter type, particularly one that uses RTS, you will need to have it replaced with a smart meter to access modern off-peak tariffs. The RTS system is being phased out, with the industry-wide switch-off beginning on 30 June 2025. Your current energy supplier is responsible for replacing your RTS meter with a smart meter, typically at no cost to you. Once you have a smart meter, you will be eligible for a wider range of time-of-use tariffs that can help you save money by using electricity during off-peak hours.

Ready to take control of your energy usage and potentially lower your bills? Fuse Energy offers clear pricing, real-time usage data through the app, and 24/7 human customer support to help you make the most of your energy. Switching is quick and easy. Click here to switch to Fuse Energy today. To learn more about our mission for a greener future, click here.