In a bid to save on energy and costs, many UK homes have transformed from simply electricity consumers to active energy systems, playing a role in how homeowners monitor, automate, store, and even export energy.
Homes with smart thermostats can reduce their heating and cooling use by 8% to 15%, and a recent analysis found that smart home technologies can cut household electricity use by 10% to 30%. In 2025, over 40 million smart and advanced metres were installed across Great Britain.
These metres help them align with time-of-use tariffs, in which the price of electricity depends on the time of day. Enhancing home energy management systems means that smart devices, metres, batteries, or software can automatically shift energy use to cheaper periods, without homeowners having to do so manually.
The Role of Smart Homes in Energy Management
Smart homes allow homeowners to be far more efficient managers than in the past, when factors such as heating, lighting, and appliances all needed to be controlled manually.
Top technologies that allow homeowners to automate energy use include smart thermostats; smart metres and energy monitors; heating controls and app-based room-by-room management; smart plugs, lighting, and occupancy sensors; and home energy management systems (HEMS).
The technology platforms known as HEMS comprise hardware and software that monitor, manage, and optimise the consumption, storage, and generation of electricity in a home.
While some devices are plug-and-play, adopting full HEMS platforms or upgrading to smart consumer units requires certified electrician services to ensure high-voltage hardware, EV charging points, and smart circuits are installed safely and in compliance with UK wiring regulations.
Today’s electricians are becoming part of the energy transition more than simply fulfilling the role of ensuring appliances are in working order.
The Four Main Functions of HEMS
HEMS have four main functions: they track energy use by everything from ACs to refrigerators in real time; they automatically schedule power-intensive tasks during off-peak hours; they direct excess solar power into home batteries or EV chargers; and they automatically run appliances in a way that eases stress on the power grid.
Given that UK smart metres track electricity consumption every 30 minutes, HEMS are particularly valuable because they connect a home’s EV charger, home battery, or heat pump to draw grid power during the cheapest 30-minute blocks.
The Value of Automation
Artificial intelligence is a big boon for energy savings, since AI-powered systems can learn a family’s energy usage, habits, and patterns, including when they are home, when they are asleep, and when they utilise the most energy.
Using these identified patterns, they can automatically adjust heating, charging, and appliance timing, while also relying on weather, occupancy, and tariff data to make decisions in advance.
For instance, a smart home system can pre-heat your home before peak-price times, delay EV charging until overnight off-peak rates apply, or run a hot water cylinder during times of day when energy is cheaper.
Reducing Standby Energy Consumption
Smart automation and HEMS can also reduce the amount of electricity that electronic devices consume while turned “off” or in standby mode, simply because they remain plugged into a live wall socket.
Even when homeowners do not actively use appliances, the latter continuously draw a small trickle of power to run background functions such as digital clocks, Wi-Fi connectivity, standby lights, or remote-control sensors.
Typical culprits include televisions, microwaves, ovens, game consoles, phone and laptop chargers, smart home hubs, and Internet routers. Automation and HEMS can reduce this load by cutting off power to entertainment setups or desk equipment when they detect that main devices (such as TVs or PCs) are shut down.
They can also cut power to non-essential loads (such as display lights) and notify users when idle circuits are unnecessarily consuming energy.
The Sun’s Undeniable Power
Rooftop solar energy, battery storage, and inverters are also forming part of the sustainable energy revolution in the UK, with many homes now storing, consuming, and exporting electricity. The UK recently surpassed two million solar installations in March 2026.
In April alone, there were about 23,000 new solar installations, and more than half were installed on homes. The good news for residents is that the UK’s solar growth is supported by the government through tax relief, grants for low-income households, zero-interest loans, and grid export mandates.
Smart technologies have helped countless UK homeowners become smarter energy managers. Smart thermostats, smart metres, and solar energy have all enabled families to lower their energy costs. These technologies have also helped inch the UK closer to its sustainability goals, which include achieving net zero greenhouse gas emissions by 2050.
