What a CCTV System Actually Involves
Ask most people what a CCTV system is, and they will describe a camera. That is 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 is 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 is worth spending more thought on than the camera housing.
Wired vs Wireless: Which Suits Your Site
Here is 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 is 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 is not practical. The trade-off is reliability. A dropped Wi-Fi connection at 2am is the one time you really do not want your camera offline.
Resolution and IP Ratings: What the Numbers Mean
A bigger megapixel number is not 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 is built to handle wind-driven rain and dust without failing. Our full buyer's guide covers what these ratings mean for coastal and high-UV NZ conditions specifically.
Privacy Act 2020: The Short Version
CCTV footage of an identifiable person counts as personal information under New Zealand law. In short, that means clear signage, a documented reason for recording, and a retention period that does not keep footage indefinitely. For the full detail, including the IPP 3A notification rule (in force from 1 May 2026) and the Biometric Processing Privacy Code 2025, see the compliance section of our full buyer's guide.
Cloud vs On-Site Storage: The Short Version
On-site NVR storage means no ongoing subscription and no dependence on your internet connection to record. Cloud storage backs footage up offsite automatically but usually costs monthly and needs a stable connection. Most commercial setups we install use on-site storage as the primary system, with cloud backup added where losing the recorder itself is a genuine risk. Our buyer's guide covers storage architecture and retention periods in more depth.
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.
Site-Specific Design
Cameras, recorders and storage chosen for your conditions, not a generic package.
In-House Workshop
Based in Mount Maunganui, with mobile technicians for on-site work.
Nationwide Supply
Equipment supplied nationwide, with on-site installation across the Bay of Plenty, Coromandel, Rotorua, TaupΕ, South Waikato, the Volcanic Plateau and Eastern Waikato.
Short-Term Hire
Available for temporary sites, events, or construction projects rather than a permanent install.
