Wired vs Wireless Alarm Systems: What London Homeowners Need to Know

Ten years ago, any security professional would have told you wired alarms are more reliable than wireless. That was true then. It's not true now. Modern wireless systems like Ajax have fundamentally changed the game with encrypted radio protocols, multi-year battery life, and tamper detection that matches or exceeds traditional wired systems.

The Old Problem with Wireless

Early wireless alarms suffered from three issues: poor battery life (needing frequent replacements), vulnerability to signal jamming, and unreliable communication. These were legitimate concerns. If you installed a wireless alarm in 2010, you had good reason to be sceptical.

How Ajax Changed Everything

Ajax Systems solved all three problems. Their Jeweller radio protocol uses encrypted, frequency-hopping communication with a 2km range. The system actively detects jamming attempts and alerts you. Battery life is measured in years, not months — most sensors last 5-7 years on a single battery. And with dual-path communication (WiFi + GSM), the hub has redundant connectivity that most wired panels don't.

When Wired Still Makes Sense

For new builds where walls are open, wired systems (Ajax Fibra line) are still excellent because you eliminate batteries entirely. Large commercial properties with hundreds of devices may also benefit from wired infrastructure. But for the vast majority of London homes — especially period properties and flats where chasing cables through walls is expensive and destructive — wireless is now the better choice.

Installation: Hours, Not Days

A typical Ajax wireless installation takes 4-6 hours for a 3-bedroom house. There's no drilling through walls, no making good plasterwork, no redecorating afterwards. Compare that to 2-3 days for a wired system with all the associated disruption. For occupied properties, the difference is significant.

Our Recommendation

For most London residential properties, we install Ajax wireless systems. The security performance matches wired, installation is faster and cleaner, and the app-based management is genuinely excellent. For new builds, we recommend Ajax Fibra (wired) because you get the same ecosystem without batteries. Either way, we integrate the alarm with Loxone automation and Hikvision CCTV for a unified security response. Contact us to discuss which approach suits your property.