How Much Electricity Do Home Security Systems in the UK Use?
Your household adds a video doorbell, two cameras and an intruder alarm before the dark winter evenings. Sensible. But home security systems UK buyers rarely ask what the kit costs to run, and that cost lands on your bill all year.
So let's price it. We'll use the Ofgem cap of 26.32p per kWh (October to December 2026) to cost single devices, then whole setups. That way you can judge home security systems in UK properties on running cost, not just price. We will also explore how to reduce the overall cost, such as the role of home energy storage within the broader house electricity management system.
How Many Watts Does a Home Security System Use?
Your home security systems UK setup is a bundle of always-on devices, each sipping power around the clock. One continuous watt uses 8.76kWh a year, about £2.31 at 26.32p per kWh. Table 1 compares typical devices.
How Much Power Do Security Cameras and Video Doorbells Use?
Your security camera system for home UK is usually built from three camera types. Plug-in Wi-Fi models draw 2–10W. PoE cameras pull 5–15W. Floodlight and PTZ cameras climb to 10–35W, and a hardwired floodlight camera rated at 33W sits near the top. A wired video doorbell's 10W supply rating? That's its maximum output, not constant draw.
How Much Electricity Do Alarms, Recorders and Routers Consume?
NVRs typically draw 6–20W, and that's before hard drives and PoE load. A basic home security alarm system UK kit manages around 7–8W in total. Advanced panels? 15–30W. Sensors add 1–5W each, sirens 5–20W.
Your router pulls 5–15W and keeps remote viewing alive. But the whole household uses it, so don't bill its full cost to your home security system UK setup.
Standby Power vs Continuous Operation
Standby power is what a device draws while it waits for something to happen. Mains-powered cameras, NVRs, routers and your home security alarm system UK control panel keep drawing it whether or not anyone's watching footage. Battery cameras differ—they drop into low-power states between events. So your total comes down to device count and mode.
Table 1: Power Consumption and Annual Cost by Device
Device | Typical draw | When it draws | Annual cost per unit |
Plug-in Wi-Fi camera | 2–10W | Continuous | £5–£23 |
PoE camera | 5–15W | Higher at night | £12–£35 |
Floodlight or PTZ camera | 10–35W | Peaks with lights or motors | £23–£81 |
Wired video doorbell | Up to 10W | Continuous | Up to £23 |
NVR or DVR (before disks) | 6–20W | Continuous | £14–£46 |
Advanced alarm panel | 15–30W | Continuous | £35–£69 |
5–15W | Shared household load | £12–£35 |
What a Home Security System Costs to Run in the UK
Running cost is simply the electricity your home security systems UK kit uses, multiplied by your unit rate. For October to December 2026, the Ofgem cap averages 26.32p per kWh plus a 54.83p daily standing charge. Ignore the standing charge here—you pay it whatever you plug in.
Note: Price cap rates change quarterly; check Ofgem for current figures. |
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Annual Electricity Costs for Different Security Setups
Basic home security alarm systems UK kits cost £16–£18 a year to run. Cameras are where it climbs: three plug-in Wi-Fi cameras run £14–£69, one floodlight camera £23–£81, a four-camera PoE system £92–£161. Eight-camera PoE? £184–£300.
Comparing the best home security systems UK retailers stock? Add running cost to the shelf price.
How Security Systems Compare With Typical Household Electricity Use
Ofgem's medium household uses 2,500kWh of electricity a year. A basic alarm takes 2.5–2.8% of that. The eight-camera upper estimate takes about 45.6%—nearly half—of electricity use, not your whole bill. Remember that when you choose between home security systems UK options. Even the best home security system UK retailers list draws power.
How Regional Electricity Prices Affect Running Costs
Postcode matters. The East Midlands unit rate is 25.36p per kWh; Merseyside and Northern Wales pay 27.86p. The expense of a 55W system is around £122 to £134 per year. For UK home security systems, identical kit costs more to run in some regions. Wondering what are Prices for a security system for home UK? Use your own tariff's unit rate.
Note: Regional rates change quarterly always check Ofgem for yours. |
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Table 2: Running Costs by Home Security Setup (24/7, Router Excluded)
Setup | Load | kWh per day | kWh per year | Cost per year | Share of 2,500kWh |
Basic alarm, whole system | 7–8W | 0.17–0.19 | 61–70 | £16–£18 | 2.5–2.8% |
Three plug-in Wi-Fi cameras | 6–30W | 0.14–0.72 | 53–263 | £14–£69 | 2.1–10.5% |
One floodlight or PTZ camera | 10–35W | 0.24–0.84 | 88–307 | £23–£81 | 3.5–12.3% |
Four-camera PoE with NVR | 40–70W | 0.96–1.68 | 350–613 | £92–£161 | 14.0–24.5% |
Eight-camera PoE with NVR | 80–130W | 1.92–3.12 | 701–1,139 | £184–£300 | 28.0–45.6% |
Note: the running costs shown are estimates based on typical power ranges, not measured figures for your equipment. Actual consumption depends on the model, settings and how the system is used. A plug-in energy meter will show your real figures. |
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What Pushes the Running Cost Up?
Device count isn't the only driver. Recording schedules, night vision, lighting and camera features change how much power your home security systems UK equipment consumes.
How 24/7 Recording Affects Electricity Consumption
Event-based recording lets cameras rest between triggers. In home security systems UK wireless setups, battery cameras coast on their batteries. They are on 24/7 recording and need a constant supply, energy use increases.
If your security camera system for home UK records around the clock, treat it as an always-on load. Motion-triggered recording on a mains camera? That saves disk space, not necessarily electricity.
How Night Vision and Infrared Increase Power Use
Infrared night vision lifts a camera's draw after dark, and the best smart home security system UK cameras switch it on automatically. A dome camera might pull 5–8W by day and up to 15W at night, Take a camera drawing 6.5W by day and 15W at night, with about 16 hours of London darkness at the winter solstice and 7.5 at midsummer.
Table 3: Seasonal Example: One Camera
Season | Daytime use | Night-time use | Daily consumption | Daily cost |
Winter solstice | 8 hours | 16 hours | 292Wh | 7.7p |
Midsummer | 16.5 hours | 7.5 hours | 219.75Wh | 5.8p |
That's roughly 33% more energy in winter. Scale it to four cameras: about 1.17kWh a day in winter (30.7p) against 0.88kWh in summer (23.1p).
Do Motion Detection and Smart Features Reduce Electricity Costs?
Motion detection trims recording storage, not mains electricity use. Person and vehicle detection make alerts more accurate, nothing more. Floodlights and pan-tilt motors are only useful when they are on, and use £76.09 a year, which adds up to a very significant demand. And 4K? This isn't a double consumption feature for 1080p content.
Comparing smart home security systems UK retailers sell? Check rated wattage first—even the best smart home security system UK listings publish one.
How to Cut the Bill Without Cutting Security
Cutting your bill doesn't mean cutting coverage. The best home security system UK buyers can fit is one whose running cost you've measured.
Measure Your Security System's Actual Electricity Consumption
A plug-in energy meter shows what your home security systems UK equipment—NVR, mains camera, alarm panel—really draws. Real readings beat spec sheets, even for the best home security systems UK brands make.
Adjust Camera Settings to Reduce Power Use
These settings reduce consumption for the majority of security systems for home UK:
Use event recording on battery cameras.
Switch off infrared or spotlights where ambient light is enough.
Schedule indoor cameras or use privacy modes at home. Most smart home security systems UK apps offer both.
Disable unused NVR channels where possible.
Are Battery-Powered and Solar Security Cameras Cheaper to Run?
Battery cameras cut continuous mains consumption, but they still need charging. One drawing 9W while it charges costs about 0.24p per charging hour. That's the appeal of wireless home security systems UK options: fewer permanently powered cameras. Check each home security systems UK wireless listing for battery life.
How Much Winter Sunlight Do Solar Security Cameras Receive?
SimpliSafe states its outdoor camera solar panel needs at least three hours of direct sunlight a day. December averages fall far short (Table 4). Bright-sunshine hours are a conservative comparison, since panels also generate in diffuse light. Still, some solar cameras need mains charging in winter, a tougher fit for UK home security systems.
Note: Met Office 1991–2020 averages; check the Met Office for current data.
Table 4: UK December Sunshine and Quoted Solar Camera Requirement
Location | December sunshine hours | Daily average |
UK average | 43 | 1.4 hours |
London (Greenwich) | 50 | 1.6 hours |
Cardiff | 50 | 1.6 hours |
Glasgow | 34 | 1.1 hours |
Belfast | 35 | 1.1 hours |
Quoted solar camera requirement | Not applicable | 3 hours |
How Home Energy Storage Helps Cut the Cost of Always-On Security Loads
Each device in a security system for home UK uses little power. Together, they run day and night, and the meter never pauses. Winter makes it worse: solar camera panels and rooftop generation both fall away just as the nights lengthen. Home energy storage changes that. It holds electricity generated by day, or bought at a cheaper rate, and releases it in the evening, so you buy less from the grid at the standard rate. It is a household-wide money-saver, not a gadget for your home security systems UK kit alone.
For scale, 5,024Wh is about 73% of an average household's daily electricity use (roughly 6.85kWh) and three to five times the daily use of the four-camera PoE system in Table 2. That is arithmetic, not guaranteed run time, backup capacity or savings. Installation needs a qualified electrician, and your DNO must be notified.
Building Solar and Storage Together to Lower Your Evening Bills
Winter evenings often mean relying on grid electricity once the sun goes down. Your cameras, NVR and alarm panel still need power, even when your solar panels stop generating. The EcoFlow STREAM 5000 helps households combine solar generation with battery storage, making it easier to use more of the electricity their panels produce. It offers 5kWh (5,024Wh) of storage, expandable up to 90kWh. It also supports 5,000W of PV input through four 1,250W MPPT channels and delivers up to 3,000W AC output. Its compact design includes a built-in handle, while Intelligent Mode+ manages energy use automatically. This means your home security systems UK setup can draw from stored solar energy alongside the rest of your household appliances.
Adding Storage to Existing Solar Panels to Use More of Your Own Electricity
In winter, rooftop panels produce less, and the surplus you do generate is gone by teatime. Without storage, it heads to the grid and you buy electricity back in the evening. The EcoFlow STREAM AC 5000 adds storage to your existing solar setup, so you keep more of your own generation for the hours you need it. It offers 5kWh (5,024Wh), expandable up to 90kWh, 3,000W AC output and a 10,000-cycle rating. Intelligent Mode+ manages automatically when stored electricity is used, and Local Mode keeps the system running and communicating if the network drops. Your home security systems UK kit then runs on electricity you generated, not electricity you bought.
Note: Compliant generation-only plug-in solar kits have been legal to buy and use in Great Britain since 27 August 2026, but these rules do not cover plug-in batteries or solar-plus-storage systems. Home batteries and systems with integrated batteries (like the EcoFlow STREAM range) are not plug-in solar products. They need professional installation and compliance with the IET Wiring Regulations (BS 7671) and the requirements of the DNO (Distribution Network Operator). For more information, check GOV.UK guidelines.
Conclusion
One continuous watt costs about £2.31 a year at this tariff. Therefore, the cost of a home security system UK installation is approximately £16 to £300 per year. 24/7 recording, night vision and floodlights push consumption up most, and solar cameras need care in winter. That holds for any home security systems UK purchase.
Those always-on loads are one slice of a bigger picture. Solar generation and home energy storage help you manage electricity across the day. Explore the EcoFlow STREAM 5000 and EcoFlow STREAM AC 5000 on the EcoFlow UK website to find the right home energy storage for your household.
FAQ About Home Security Systems in the UK
How Much Does It Cost to Buy and Fit Home Security Systems in the UK?
Prices vary by route. UK price guides put a four-camera wireless system at £450–£850, a fitted four-camera wired system at £800–£1,200 and eight wired cameras at £1,000–£1,500. When you price home security systems in UK shops, ask about running cost too. Prices change; check current quotes.
Can I Fit a Home Security System Myself in the UK?
Often, yes. Many battery-powered and plug-in kits, including most wireless home security systems UK ranges, suit DIY fitting. Mains wiring, alarm panels and PoE cabling differ. Renting? Get landlord permission before drilling outside, whichever security systems for home UK you choose.
Does a Home Security System Lower Home Insurance Costs in the UK?
Insurers often ask about home security alarm systems UK standards, and discounts depend on the insurer and policy. Check which alarm standards or installer certifications they accept; NSI and SSAIB are two recognised bodies.