What a CCTV System Actually Involves
Ask most people what a CCTV system is, and they'll describe a camera. That's only half of it. The camera captures the image, but the recorder is what decides whether that footage is any use to you six weeks later.
DVR vs NVR: The Difference That Actually Matters
A DVR (Digital Video Recorder) works with older analogue cameras. The camera sends a raw video signal down a cable, and the DVR does all the processing and recording centrally. It's a familiar, well-proven setup, but image quality tends to lag behind newer options.
An NVR (Network Video Recorder) pairs with IP cameras that process video themselves before sending it over the network. That gives sharper footage, more flexibility with camera placement, and better remote viewing through a phone app. Most new commercial installs in New Zealand now go the NVR and IP camera route for exactly these reasons.
Whichever you choose, the recorder is the actual brain of the system, and it's worth spending more thought on than the camera housing.
Wired vs Wireless: Which Suits Your Site
Here's a fair question: does it actually matter if your cameras run over Wi-Fi instead of a cable? For a lot of home setups, no. For a business relying on footage to hold up as evidence, it matters more than people expect.
Wired cameras, usually run over PoE (Power over Ethernet), get both power and data through a single cable back to the recorder. That means no dependence on Wi-Fi signal strength, no dropped frames when the network's busy, and no camera going dark because someone unplugged a router.
Wireless cameras are faster to install and better suited to temporary setups, rental properties, or sites where running cable isn't practical. The trade-off is reliability. A dropped Wi-Fi connection at 2am is the one time you really don't want your camera offline.
For a permanent commercial installation, wired is the safer default. For a temporary site, event, or a spot where cabling genuinely isn't feasible, wireless or 4G-connected cameras earn their place.
Resolution and IP Ratings: What the Numbers Actually Mean
A bigger megapixel number isn't automatically better if the footage is useless in the dark or dies the first time it rains. Two figures actually matter more than resolution for most commercial sites.
Infrared and Low-Light Performance
Most incidents worth reviewing happen at night. A camera with genuine infrared (IR) illumination will keep producing usable footage in the dark, not just a black rectangle. Check the IR range in metres, not just whether "night vision" appears on the box.
IP Rating for Outdoor Use
Any camera going outside in New Zealand needs a real ingress protection rating, not a vague "weatherproof" claim. An IP66 or IP67 rating means it's built to handle wind-driven rain and dust without failing. If a camera's spec sheet doesn't list an IP rating at all, that's a sign it wasn't built for permanent outdoor use.
Your Legal Obligations Under the Privacy Act 2020
CCTV footage of an identifiable person counts as personal information under New Zealand law, whether you're a five-person shop or a national contractor. That means the Privacy Act 2020 applies, and getting it wrong isn't just a technicality, it's the kind of thing the Office of the Privacy Commissioner does actually investigate.
Signage Isn't Optional
You need clear, visible signage at entry points to any monitored area. It should state that CCTV is in operation, name the business or operator, briefly explain the purpose (security, safety, loss prevention), and give contact details. A vague sticker that just says "Smile, you're on camera" doesn't meet this properly.
Retention Has to Have a Reason
Don't keep footage indefinitely just because storage is cheap. Retention should match your actual purpose, many NZ businesses run a 14 to 30 day cycle unless footage is needed for an active investigation, insurance claim, or safety review. If someone asks why you're still holding footage from eight months ago, you should have an answer.
Where You Can and Can't Point a Camera
Entrances, car parks, sales floors, and general work areas are generally fine. Bathrooms, changing rooms, and anywhere people have a reasonable expectation of privacy are off-limits. Audio recording carries extra restrictions under the Crimes Act 1961, since it's generally illegal to record a private conversation you're not part of, so most commercial systems run video-only.
People Have a Right to Ask
Under the Privacy Act, someone can request footage of themselves. If an employee or customer asks whether they're on your system and wants to see the footage, you need a process for handling that request, not a blank stare.
Cloud vs On-Site Storage
Where your footage actually lives matters as much as the camera capturing it. On-site storage, footage recorded to an NVR sitting in your building, means you're not paying an ongoing subscription and you're not dependent on an internet connection to record. The trade-off is that if the NVR itself is stolen or damaged, that footage can go with it.
Cloud storage backs footage up offsite automatically, which protects you if the on-site hardware is compromised, but it usually comes with a monthly cost and depends on a stable internet connection to upload continuously.
Most commercial setups we install use on-site NVR storage as the primary system, with cloud backup added for sites where losing the recorder itself is a genuine risk. Neither option is wrong, it depends on what you're protecting against.
Getting a System Installed Properly
Mobile Systems Limited is 100% New Zealand owned and based in Mount Maunganui, with over 25 years supplying and installing communications and security equipment. We stock Dahua commercial CCTV cameras and NVR systems, along with Viewtech vehicle and reversing camera systems, and we design each system around the site rather than selling a one-size-fits-all package.
Our in-house workshop and mobile technicians cover on-site installation across the Bay of Plenty, Coromandel, Rotorua, Taupō, South Waikato, the Volcanic Plateau and Eastern Waikato, with equipment supply available nationwide. Short-term hire options are also available if you need coverage for a temporary site, event, or construction project rather than a permanent install.
