Every storm season, the same question comes up the day after a big blow-through: “The power was out for six hours last night. Did my cameras even record anything?” It’s a fair question, and for a lot of properties across Brisbane, the Gold Coast and the Sunshine Coast, the honest answer is no. A power outage doesn’t just mean the lights go out. It can mean your cameras stop recording, your alarm stops monitoring, your gate stops opening, and the whole system goes dark right when the street is at its darkest too.
South East Queensland gets more of these events than most of the country. Between storm season, ex-tropical cyclones tracking down the coast, and the odd substation fault, a blackout here isn’t a rare edge case, it’s a predictable annual event. This guide covers what actually happens to a typical CCTV, alarm and access control setup when the power cuts out, what “battery backup” really buys you, and how to build a system that keeps working when you need it most.
Why This Matters More in South East Queensland Than Most Places
Storm season in this part of the country generally runs from November through to April, and it doesn’t take a full cyclone to knock out power to a suburb. A severe thunderstorm cell moving through Brisbane, a fallen tree on the Sunshine Coast hinterland, or king tide flooding around low-lying Gold Coast canal estates can all take the grid down for hours, sometimes overnight. Storm-related outages are a regular feature of every SEQ summer, and coastal and semi-rural properties are often among the last to be reconnected, simply because there’s more network to repair.
During a widespread outage, streetlights are out, neighbours’ security lights are dark, and anyone relying purely on mains-powered cameras or a monitored alarm with no backup is, for the duration of that outage, running no security system at all.
What Actually Happens When the Power Cuts Out
Not every part of a security system fails the same way, and not every failure is obvious until you’re relying on it.
CCTV Cameras, NVRs and DVRs
Most residential and small business CCTV security camera installations run on mains power, either through a plug-pack at each camera or, more commonly on newer systems, Power over Ethernet (PoE) from the recorder. Either way, when the mains power stops, the cameras stop, and so does the recorder they’re feeding footage to. There is no recording, no live view, and nothing captured for that entire window, unless the system has been specifically fitted with battery backup.
Alarm Panels
Alarm panels are the one part of a typical system that’s usually already backed up. Most modern alarm panels include a small internal battery designed to keep the panel, siren and detection sensors running for a set period after mains power drops, often somewhere in the range of 8 to 24 hours depending on the panel and how old the battery is. This is one of the reasons a wired alarm is still worth having even in a heavily camera-focused system.
Access Control, Intercoms and Gate Motors
This is the area people are most often caught out by. Electric gate motors, swipe or fob readers, and video intercoms are almost always mains-powered with no backup unless it’s been specifically designed in. A power outage can mean a gate stuck open, a gate stuck shut, or an intercom that simply doesn’t answer, which is a real problem for gated communities and multi-tenant buildings where the gate or door is the only line of physical security. If you’re weighing up an access control system for a body corporate or commercial site, backup power for the gate or door hardware itself is worth raising at the quoting stage, not after the first outage.
The Internet Connection
Even a system with battery-backed cameras and a battery-backed alarm panel usually still depends on your internet connection to send alerts, push footage to the cloud, or notify a monitoring centre. Your NBN modem and router are mains powered like everything else, and unless they’re on their own backup power, they’ll drop the moment the grid does, cutting off remote access and alerts even if the cameras themselves are still technically recording locally.
Back-to-Base Monitoring and What Happens When the Internet Drops Too
This is exactly where back-to-base monitoring earns its keep over a system that just sends you a phone notification. A properly specified monitored alarm doesn’t rely on a single path to reach the monitoring centre. Dual-path monitoring typically pairs the NBN or landline connection with a cellular backup, so if the internet connection drops during a blackout, the panel can still report an alarm event over the mobile network, provided the panel itself still has power from its internal battery.
This is the difference between a system that quietly goes offline during exactly the conditions that leave a property most exposed, and one that keeps talking to a monitoring centre regardless of what the NBN or the power grid is doing. If your current monitoring setup only has one path to the outside world, it’s worth asking your installer what happens to that path specifically during a power outage, not just whether the panel has a battery.
Building a System That Actually Survives a Blackout
None of this means you need to over-engineer a home security system into a small power station. It means being deliberate about which parts of the system need to keep running, and for how long, then backing up exactly those parts.
Battery Backup and Realistic Runtime
A small UPS (uninterruptible power supply) or dedicated battery backup unit fitted to the NVR and network gear is the most common fix, and it’s usually a modest addition to the cost of a new security system installation rather than a major redesign. What it buys you depends entirely on sizing: a small backup might keep a recorder and a couple of cameras running for an hour or two, enough to cover a brief outage, while a larger unit sized specifically for the load can extend that to several hours. The honest answer to “how long will it last” is always “it depends what you’re backing up and how big the battery is,” which is exactly the conversation worth having with your installer before an outage, not during one.
Centralising Power Where Possible
Systems built around PoE, where cameras draw power from a single cable run back to the recorder rather than each having its own plug-pack, are generally easier and cheaper to back up, because you only need to protect power at the recorder end rather than at every camera location around the property. This is one of several reasons proper structured cabling pays off at installation time rather than retrofitting cameras onto whatever wiring happens to already be there; see our guide on optic fibre and data cabling if you’re planning a new build or renovation and want the wiring done right from the start.
Cellular Backup for Monitoring and Alerts
Separate from battery power, a cellular backup module for your alarm or monitoring connection means alerts and monitored responses don’t depend on your home or business internet staying up. For back-to-base monitored systems this is standard practice; for self-monitored camera systems that only alert via an app, it’s worth asking specifically whether that capability exists, because plenty of consumer-grade systems don’t offer it at all. For properties with no reliable fixed connection at all, our guide to 4G and solar security cameras covers the options.
Solar and Whole-Property Battery Systems
Some properties, particularly newer builds or renovations on the Sunshine Coast and Gold Coast hinterland, are adding home battery storage for general power resilience, not just security. Where that’s already part of the plan, it’s worth looping in your security installer early so gate motors, NVRs and network gear can be wired onto the backed-up circuits rather than left on the general mains circuit by default. This is a conversation for your electrician and security installer together; the security system itself doesn’t need to power the whole house to keep working, it just needs to be on the right circuit.
A Simple Pre-Storm-Season Checklist
A few practical things worth checking before the next storm season rolls around, whether your system is new or years old:
- Ask your installer or check the panel for battery age. Alarm and UPS batteries typically need replacing every 3 to 5 years, and a flat backup battery is the same as having no backup at all.
- Confirm whether your monitored alarm has cellular backup, or only relies on the internet connection.
- Check whether your CCTV recorder and network gear are on any kind of battery backup, and if not, get a realistic runtime quote for adding one.
- If you have an electric gate, ask what it does specifically during a power cut (locks open, locks shut, or fails safe) and whether that’s actually the behaviour you want.
- Trim back trees and check gutters near outdoor cameras and enclosures ahead of storm season, since water ingress after storm damage causes plenty of camera failures on its own.
Frequently Asked Questions
Do CCTV cameras keep recording during a power outage?
Only if the recorder and cameras have battery backup fitted. Without it, mains-powered CCTV systems stop recording the moment the power drops and resume once power is restored, leaving a gap in footage for the entire outage.
How long does battery backup for a security system actually last?
It depends on the size of the battery and what it’s powering. A small backup might cover an hour or two for a recorder and a few cameras, while a larger, properly sized unit can extend that to several hours. Get a specific runtime estimate from your installer based on your actual equipment rather than assuming a standard figure applies.
Will my monitored alarm still work if the power and internet both go out?
If the panel has an internal battery (most do) and a cellular backup path in addition to the internet connection, yes, it can typically still report alarm events to the monitoring centre over the mobile network. If it only has one path to the outside world, an outage that takes out both power and internet can leave it unable to report anything at all.
Should I get a generator just for my security system?
For most residential properties, a dedicated battery backup or UPS is a simpler and cheaper solution than a generator, and it starts working instantly rather than needing to be started manually. Generators make more sense for larger commercial or industrial sites where a wider range of equipment needs to stay powered during an outage.
Does this affect access control and intercoms too, not just cameras?
Yes. Electric gates, swipe and fob readers, and video intercoms are usually mains-powered with no backup unless it’s specifically designed in. This is worth raising directly with your installer at quoting stage, particularly for gated communities and multi-tenant buildings where the gate or door is the primary line of physical security.
If your current system would go dark in the next outage, or you’re planning a new installation and want power resilience built in from day one rather than bolted on later, we’re happy to walk through what makes sense for your property anywhere across Brisbane, the Gold Coast and the Sunshine Coast. Get in touch or call us on 07 5453 7240 to talk it through before storm season hits.
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