Right, let’s talk about smart home tech. Not the fancy stuff where your fridge orders milk or your toaster talks to you. I mean the actual useful gadgets that can genuinely cut your energy bills without making your life complicated.
The thing is, UK households now have an average of 10 to 13 internet-connected devices running daily, and while each one seems harmless on its own, the cumulative effect of 20+ small devices can quietly add £60–£100 a year to an average household’s bill.
But here’s the good news – smart tech can also be the solution. You just need to know which gadgets actually save you money and which are just expensive toys.
Smart Thermostats – The Big Money Saver
Let’s start with the one that actually makes a difference. Smart thermostats are genuinely brilliant for cutting heating costs, and heating’s probably the biggest chunk of your energy bill.
How Much Can You Actually Save?
According to the Energy Saving Trust, a smart thermostat could save you around 10% on your heating bills over the year. For the average household paying £1,200 a year on heating, that’s £120 saved. Every year.
Not bad for a bit of tech that costs £150-£250.
How They Actually Work
Smart thermostats like Hive, Nest, and Tado learn your daily routine and automatically adjust the temperature. So your heating’s not blasting away when no one’s home, but the house is warm when you get back.
You can control everything from your phone too. Left for work and forgot to turn the heating off? Sort it from the bus. Coming home early? Warm the house up on your way back.
The really clever ones use geofencing – your phone’s location tells the thermostat when you’re leaving or approaching home. It adjusts automatically without you doing anything.
Best Smart Thermostats
Nest Learning Thermostat – The famous one. About £219. Learns your habits over time and creates a schedule automatically. Looks nice too.
Hive Active Heating 2 – Around £150. British company, integrates well with other Hive products. Simple to use.
Tado – £180-ish. Brilliant if you want room-by-room control. Their smart radiator valves are excellent.
Honeywell T6 – Budget option at £120. Does the job without the fancy learning features.
All of them connect to your phone and work with Alexa or Google Home. Pick whichever one your installer recommends – they’re all solid.
The Extra Trick: Turn It Down One Degree
Here’s a simple hack that works with or without smart tech. Turning your thermostat down by just one degree can cut your energy bill by 10%.
Most people have their heating at 21-22°C. Try 20°C. You honestly won’t notice the difference, but your wallet will.
Smart Radiator Valves (TRVs) – Room-by-Room Control
These are proper underrated. Smart thermostatic radiator valves let you control each radiator individually.
Why They’re Brilliant
No point heating the spare bedroom that no one uses, is there? Or the bathroom when you’re at work all day.
Adding TRVs to a system that already has a programmer and thermostat can save £35 a year. And by directing heat only where it’s needed, you’ll reduce your energy use and carbon footprint.
Tado and Netatmo do excellent smart TRVs that connect to your thermostat and phone. You set different temperatures for different rooms, and they handle it all automatically.
Standard smart TRVs cost around £30 each, so for a typical house with 6-8 radiators, you’re looking at £180-£240. But combined with a smart thermostat, the savings add up fast.
Smart Plugs – Stop Paying for Standby
This one’s dead simple and cheap. Smart plugs let you turn things off remotely or on a schedule.
The Standby Problem
In UK homes, standby power can be 8–10% of total electricity use. That’s a big chunk of your bill for devices that aren’t even being used.
TVs, games consoles, chargers, microwaves with clocks – they’re all sitting there drawing power 24/7. The typical broadband router alone consumes about 150 kWh annually, roughly the same as leaving a 10-watt bulb on continuously.
How Smart Plugs Help
Plug your TV setup into a smart plug. When you go to bed, the plug turns off completely. No more standby. Same with your router – do you really need WiFi from 1am to 6am?
You can set schedules or just turn things off from your phone when you’re not using them.
Best Smart Plugs
TP-Link Tapo plugs are brilliant. They’re not only compact and easy to set up, they don’t require a hub for remote access. About £10 each, or £25 for a pack of four.
TP-Link also has an energy-monitoring version that tracks power usage, which is handy for working out which devices are energy hogs.
Other good options: Hive Smart Plugs (£20), Meross Smart Plugs (£12), Amazon Smart Plugs if you’re all-in on Alexa (£25).
Smart Lighting – Stop Wasting Electricity on Lights
Lighting’s not the biggest energy cost, but it adds up. Especially if you’re terrible at remembering to turn lights off.
LED Smart Bulbs
Smart lighting stops lights from being left on unnecessarily. Paired with energy-efficient LEDs, it can cut energy use by up to 80% compared to halogens.
Smart bulbs like Philips Hue, LIFX, or TP-Link Tapo let you:
- Turn lights off from your phone
- Set schedules (lights off at midnight automatically)
- Use motion sensors (lights only on when someone’s in the room)
- Control them with voice (“Alexa, turn off all the lights”)
Motion Sensor Lights
Stick a motion sensor in the hallway, bathroom, or utility room. Lights come on when you enter, off when you leave. Simple, effective, stops lights being left on for hours.
Philips Hue motion sensors are about £30. Cheaper options from Tapo or Aqara work too (£15-20).
The Security Bonus
The bulbs have been recommended by An Garda Síochána as a security measure too, so they can be turned on and off even if your home is empty.
Set your lights to turn on and off randomly when you’re on holiday. Makes it look like someone’s home. Costs nothing to run.
Smart Meters – Knowledge Is Power
Not exactly “smart home tech” but worth mentioning. Smart meters show you real-time energy usage.
Why They Help
When you can see exactly how much electricity or gas you’re using right now, you make different choices. Running the tumble dryer costs 40p? Maybe I’ll hang the washing up instead.
Smart meters are free from your energy supplier. They’re not perfect (some lose connection, the in-home display can be a bit rubbish), but they do make you more aware of usage.
The government’s pushing hard for smart meter rollout because they enable flexible tariffs – cheaper electricity at off-peak times. Which brings us to…
Time-of-Use Tariffs – Use Cheap Electricity
This is where smart tech really shines. Time-of-use tariffs charge different rates depending on when you use electricity.
How It Works
Octopus Go charges about 10p per kWh overnight (12:30am-4:30am) but normal prices during the day. Octopus Agile changes prices every 30 minutes based on wholesale costs.
If you’ve got smart appliances or smart plugs, you can schedule high-energy tasks for cheap periods:
- Dishwasher runs at 1am
- Washing machine at 3am
- Heat pump or electric car charges overnight
- Batteries charge when electricity’s cheap
EV owners, for instance, already benefit from tariffs that cut overnight charging costs by up to 50%.
Smart Appliances
Modern dishwashers, washing machines, and tumble dryers often have “delay start” features. Even better if they connect to your WiFi and can be controlled remotely.
But honestly? A £10 smart plug on a normal appliance does the same job.
Smart Heating Controls Beyond Thermostats
If you want to get really sophisticated with heating, there’s more you can do.
Heat Pump Controllers
If you’ve got a heat pump (or planning to get one), smart controllers are brilliant. They can coordinate with solar panels, time-of-use tariffs, and weather forecasts to heat your home as efficiently as possible.
Myenergi Eddi, for example, diverts excess solar generation to heat your hot water cylinder. Free hot water basically.
Smart Curtains and Blinds
Sounds fancy, but they actually work. Smart blinds close automatically when the sun’s beating through windows (keeping the house cooler in summer) or open to let heat in during winter.
Expensive though – £100-300 per window. Only worth it if you’re doing a full smart home setup.
Energy Monitoring Systems
Want to go full nerd mode? Get a proper energy monitoring system.
What They Do
Systems like Sense or Emporia Vue connect to your consumer unit and track exactly what’s using electricity in real time. They can identify individual appliances and tell you how much each one costs to run.
Properly eye-opening when you discover your ancient fridge-freezer is costing £200 a year to run.
Cost: £200-300 for the hardware, plus installation if you’re not handy with electrics.
The Air Fryer Trick
Not strictly smart tech, but everyone should know this. Air fryers cook food faster and use a lot less energy than ovens.
Heating a full oven for one chicken breast is mental. Stick it in an air fryer instead – heats up in 2 minutes, cooks faster, uses a fraction of the electricity.
Size is an important consideration, with the energy-saving benefits of an air fryer diminishing rapidly if you need to go two or three rounds to get all the food cooked.
Get a big one (at least 7-8 litres) so you’re not cooking in batches. About £80-150 for a decent one.
What NOT to Waste Money On
Some smart tech is just… pointless for energy saving.
❌ Smart fridges – They cost a fortune and don’t save energy. Just buy an efficient normal fridge.
❌ Smart ovens – Being able to turn your oven on remotely sounds good until you realise it’s a fire hazard and you’ll never actually use it.
❌ Smart kettles – Why? Just… why?
❌ Loads of different ecosystems – Stick to one or two platforms (Amazon Alexa, Google Home, Apple HomeKit). Mixing everything gets messy.
The Budget Approach – Start Small
Don’t feel like you need to spend £1,000+ to see savings. Start with the basics:
Under £50:
- 4x smart plugs (£25)
- Smart LED bulbs for rooms you forget to turn lights off (£20)
£50-£200:
- Smart thermostat (£150)
- Motion sensor lights for hallway/bathroom (£30-50)
£200+:
- Smart thermostat + TRVs for multiple rooms
- Energy monitoring system
- Smart curtains/blinds
Even just smart plugs and a thermostat will save you £150+ per year. That’s payback in under 2 years.
Actually Using the Tech
The best smart tech in the world is useless if you don’t set it up properly.
Take an Hour to Configure Everything
- Set proper schedules on your thermostat
- Programme smart plugs to turn off overnight
- Connect everything to one app/voice assistant
- Set up automation rules (when I leave home, turn heating down)
Check Your Usage
Most smart tech comes with apps that show you usage and costs. Actually look at them occasionally. You’ll spot patterns and ways to save more.
Involve Everyone in Your House
No point having smart heating if your partner keeps overriding it and cranking it up to 25°C. Get everyone on board with how it works.
The Realistic Savings
Right, let’s be honest about what you’ll actually save:
- Smart thermostat: £100-150/year
- Smart TRVs: £30-50/year
- Smart plugs: £30-60/year (depends how many you use)
- Smart lighting: £20-40/year
- Time-of-use tariffs: £100-300/year (if you actually use off-peak electricity)
Total realistic savings: £280-600 per year
Initial investment: £200-500 depending on what you buy.
Payback: 1-2 years typically.
After that, it’s pure savings every year.
Final Thoughts
Smart home tech isn’t magic. It won’t transform your bills overnight. But used sensibly, it genuinely does save money.
The key things that actually work:
- Smart thermostat (biggest saving)
- Smart plugs to kill standby power
- Time-of-use tariffs if you can shift usage
- Smart TRVs for room-by-room heating
Start with a smart thermostat and a few smart plugs. See the difference. Then expand from there if you want.
And remember – the smartest energy-saving tech is still just… turning stuff off when you’re not using it. All this smart tech just makes that easier and more automatic.
But it does work. £300-500 a year saved is real money. Pays for a nice holiday, or just means you’re not choosing between heating and eating come winter.
Worth it.