What is the best place to start when buying CCTV?

Start with the site and the questions the system needs to answer later. In simple terms, decide what needs to be seen, how far back footage may need to be reviewed, and whether the site is a home, small business, or larger commercial environment before comparing brands.

Should I choose IP CCTV or coax and TVI?

IP is usually the stronger choice on new cabling, expansion-minded jobs, and sites that want easier recorder and switch design. Coax and TVI still make sense on retrofit jobs where the existing cabling is usable and the main goal is to modernise the system without rewiring everything.

Is 8MP always better than 4MP or 6MP?

Not automatically. 8MP is useful when the scene is wider or the owner wants more crop margin, but 4MP and 6MP are often the more sensible fit on standard entries, corridors, counters, and smaller external approaches.

Do I need a PoE switch as well as an NVR?

Sometimes. Small systems may run neatly from a PoE NVR alone, but larger sites, multi-building layouts, or longer cable paths often push the design toward one or more PoE switches as part of the camera network.

What is the difference between home CCTV and business CCTV?

Home CCTV usually revolves around doors, driveways, garages, side paths, and parcel or vehicle review. Business CCTV usually adds customer movement, staff-only areas, stock or asset exposure, audit trail expectations, and more structured retention and user permissions.

What tools should I use before buying?

The main practical tools are the CCTV Storage Calculator, Camera Planner, UPS Backup Time Calculator, CCTV Signage Generator, and Resolution Simulator. They help turn broad assumptions into a more usable system design.

Commercial

CCTV Buying Guide Australia: How to Choose the Right Security Camera System

A good CCTV system is not just a pile of cameras. It is a set of decisions about scene type, night performance, recorder size, retention, app access, and how the site will actually use the footage later.

Buying Guide

Most buyers do not begin with a brand. They begin with a problem. A homeowner wants to see who came up the driveway. A cafe owner wants clearer after-hours footage at the rear door. A warehouse operator wants to review forklift and loading activity. A school wants better coverage of walkways and after-hours perimeter lines. Those are different jobs, and the strongest camera system is usually the one that keeps the decision tied to the site instead of chasing one spec in isolation.

A systematic way to choose CCTV

It is easier to choose CCTV when the decisions happen in the right order. Buyers often start by comparing brands, camera shapes, or megapixels too early, then end up with the wrong recorder, the wrong lens, or too little storage. In simple terms, the system should usually be planned from scene and workflow first, then hardware second.

Step	What to decide	Why it matters
1	Main scenes	The front door, driveway, counter, side path, gate, roller door, and yard edge all need different camera thinking.
2	Architecture	New cable, existing coax, remote sheds, and multi-building layouts affect whether IP or TVI is the better path.
3	Camera type and lens	The scene decides whether the camera should be fixed, varifocal, turret, dome, bullet, or something more specialised.
4	Night strategy	Ordinary IR, stronger full-colour, deterrence lighting, and thermal all suit different site problems.
5	Recorder and retention	Camera count, resolution, and review habits decide whether the NVR and HDD path is realistic.
6	Power, switching, and app use	PoE switches, UPS backup, and remote viewing are part of the design, not optional extras.

What a buyer should normally decide first

Decision	Why it matters	Typical consequence
What needs to be seen?	An entry, a driveway, a yard edge, a counter, a stockroom door, and a long aisle all need different camera thinking.	Changes lens, camera shape, and resolution choices.
How long does footage need to be kept?	Retention drives hard-drive count, recorder path, and whether a small NVR is enough.	Changes NVR size and storage cost.
Is this a new cabling job or a retrofit?	New cabling often points toward IP. Existing coax may keep TVI or coax-based upgrades in the conversation.	Changes the overall system architecture.
Does the site need strong night-time colour, ordinary IR, or something more specialised?	The night question changes the camera family more than most buyers expect.	Changes low-light and deterrence strategy.
Who will use the footage?	A family checking an app is different from a business reviewing incidents, disputes, or staff-only areas.	Changes recorder access, app design, and governance.

If you want to compare scene coverage more visually, the Resolution Simulator is a useful starting point. It can also help to watch sample 4MP, 6MP, and 8MP footage on YouTube so the buyer can see what wider views, tighter crop margin, and night-time tradeoffs look like in practice rather than only reading a spec sheet.

IP vs coax / TVI

On most new jobs, IP CCTV is the clearer starting point. Each camera runs back by Cat5e or Cat6 to a PoE recorder or PoE switch, and the system is easier to expand, easier to structure cleanly, and generally better suited to mixed-resolution modern cameras. Coax and TVI still matter when a site already has usable coax cabling and the main goal is to improve image quality or replace older analogue hardware without recabling the whole building.

For a basic office, shop, or home where new cable is being run anyway, IP usually wins. For an older warehouse office, small commercial tenancy, or home with serviceable coax already in the walls, a TVI or coax reuse path can still be commercially sensible if the expectations are realistic.

4MP vs 6MP vs 8MP

Resolution should be chosen by scene size, crop expectations, and storage reality. It should not be chosen because a higher number sounds safer.

Resolution	Usually strongest for	What to be careful with
4MP	Standard doors, side paths, smaller yards, counters, and ordinary internal coverage	Can run out of crop margin on wider scenes if the camera position is poor
6MP	The middle ground on many better home and small-business jobs	Still needs the right lens and mounting height to be worthwhile
8MP	Wider scenes, more crop room, stronger identification on larger external approaches	Pushes storage and bandwidth harder, and can be wasted on short narrow scenes

Turret vs dome vs bullet

These shapes are not just cosmetic. They affect how the camera fits the site and how cleanly it will be installed.

Camera shape	Usually strongest for	Typical note
Turret	General-purpose entries, side paths, yards, offices, homes, and most standard CCTV scenes	Usually the easiest and most forgiving form factor on mainstream jobs
Dome	Cleaner internal finishes, some retail ceilings, schools, offices, and areas where the camera needs a more enclosed look	Good where vandal resistance or a tidier ceiling look matters
Bullet	Longer approaches, perimeter lines, loading areas, yards, and mounts where directionality matters	Often more obviously directional and more common on external perimeter work

Fixed lens vs varifocal

A fixed-lens camera is often enough where the scene is predictable: front doors, rear doors, side gates, corridors, counters, and ordinary driveway lines. A varifocal or motorised lens becomes more useful when the installer needs to tune the view on site, such as a wide frontage, a long warehouse aisle, a shallow forecourt, or an awkward mixed-depth scene.

The mistake we often see is choosing a fixed camera on a scene that obviously needs tuning. The result is usually one of two bad outcomes: too much wide empty space, or not enough detail where the actual incident happens.

NVR sizing, storage, and PoE switches

The recorder path should be decided early. A four-camera home job, an eight-camera cafe or office, and a sixteen-camera warehouse or medical site are not just different camera counts. They are different recorder and storage problems.

System size	Typical recorder path	What usually matters
4 cameras	Small PoE NVR can be fine	Works well if growth is unlikely and retention is modest
8 cameras	8-channel NVR is often the more realistic minimum	Often the point where one HDD bay can become limiting
16 cameras and up	16-channel or larger NVR, often with more HDD headroom	Storage, permissions, and network layout become much more important

A PoE switch becomes more relevant once the cameras are spread across a larger site, a multi-building site, a warehouse, or anywhere the recorder cannot realistically act as the one neat power point for everything. A switch-based design often gives a cleaner result than dragging every camera back to one cupboard just because the NVR has ports.

Night vision, AI detection, app viewing, and storage

Night performance is one of the biggest sources of buyer disappointment. Some sites simply need normal infrared. Others need stronger full-colour night footage on key views. Some difficult sites need active deterrence, or in more specialist cases, thermal. The right answer depends on the scene and the review question.

AI human and vehicle detection is useful because it improves event filtering and helps keep app alerts more usable. But it is not a substitute for camera placement. A poorly aimed camera with good analytics is still a poorly aimed camera.

App viewing matters more than many buyers expect. It is one thing to say the system has an app. It is another to decide who will use it, what they will look at, whether notifications are useful or noisy, and whether the NVR, switch, modem, and UPS design support that workflow properly.

Before buying, the CCTV Storage Calculator should be used to convert camera count, resolution, recording mode, and retention assumptions into a more realistic storage plan. The Camera Planner and CCTV Signage Generator also help turn a broad camera list into a more usable layout.

Installation considerations that change the buying decision

A CCTV system should not be planned as if the installer will somehow make poor hardware fit later. Mounting height, cable path, switch position, recorder location, UPS support, and app setup all affect what should be bought in the first place.

Installation consideration	Why it matters	What usually changes
Mounting height and angle	A good camera on the wrong angle still gives poor review footage.	The lens choice, camera count, or mounting point may need to change.
Recorder location	The NVR should be protected, ventilated, practical to cable back to, and not easy to tamper with.	The site may need a cabinet, a better room, or a switch-based layout.
PoE switch position	Larger sites and remote structures often work better with local switching rather than long home runs.	The power and network design can become cleaner and easier to service.
Night lighting and reflective surfaces	Wet concrete, white walls, roller doors, shopfront glass, and parked vehicles change night behaviour.	The site may need a different low-light strategy or a different camera location.
Internet and app access	Remote viewing is part of the user experience, not an afterthought.	Modem position, UPS planning, and user permissions may need more attention.
Power backup	If the recorder or switch drops out on short outages, footage and app access may disappear when they are most useful.	A UPS may be justified for the NVR, switch, or modem path.

For a small home, this may only mean choosing sensible cable routes and keeping the recorder out of a hot roof cavity or exposed garage shelf. For a business, school, warehouse, or apartment site, it usually means reviewing camera cabling, switch layout, recorder security, signage, app permissions, and storage together before hardware is ordered.

Common CCTV buying mistakes

Too much attention goes to megapixels and not enough to the actual scene geometry.
A fixed lens is chosen on a view that clearly needs tuning on site.
The recorder is selected on channel count alone without enough storage headroom.
The site assumes the NVR should power everything even when a PoE switch layout is cleaner.
Night expectations come from polished product images rather than the real site lighting and surfaces.
App access is promised without deciding who should receive alerts and how noisy those alerts will become.

CCTV glossary in plain English

Term	Meaning
IP CCTV	Network-based CCTV where cameras are usually connected by Cat5e or Cat6 and powered by PoE.
TVI or coax CCTV	A coax-based camera path often used for retrofit upgrades where existing cabling is being reused.
NVR	The network video recorder that stores and manages the footage.
PoE	Power over Ethernet. It means the camera can receive power and data through one network cable.
Turret camera	A common camera shape used on many home and business jobs because it is versatile and easy to aim.
Varifocal camera	A camera with an adjustable lens used where the view needs to be tuned on site.
AI human and vehicle detection	Analytics that help filter events and alerts so the user is not reacting to every motion event.
Retention	How long footage is kept before the system records over it.
UPS	Battery backup used to keep the recorder, switch, or modem running through short outages.

Home CCTV and business CCTV are not the same design conversation

Home systems usually revolve around who approached the house, what happened on the driveway, whether a parcel or vehicle event can be reviewed, and whether the owner can check the app quickly. Business systems usually add customer movement, staff-only zones, stock exposure, dispute review, audit trail expectations, and stronger retention discipline.

That is why these two support pages belong alongside this parent guide:

Best Home CCTV System Australia

Broad residential guidance covering small homes, townhouses, larger homes, garages, driveways, side paths, and DIY versus installed paths.

CCTV Systems for Small Business

A broad business umbrella page linking buyers into retail, cafes, offices, warehouses, medical, pharmacy, and other business CCTV use cases.

Office CCTV Systems Australia

Office-focused guidance covering reception, entry, server rooms, staff areas, after-hours access, and the access-control crossover.

Worked examples

Example: townhouse front and rear coverage

Situation: A townhouse owner wants better visibility at the front door, driveway mouth, and rear courtyard gate, with simple app access for the household.

Solution used: A small IP system with fixed turrets, a modest PoE NVR, ordinary IR or low-light upgrade only on the key entry view, and realistic retention based on how often the owner actually reviews footage.

Why this was chosen: The scenes are short and predictable. The job is clarity and convenience, not a complex commercial camera mix.

Installation notes: The front view needed the cleanest face angle. The rear gate needed a sensible mount height so the camera was not just looking down at the top of heads.

Example: small cafe with front entry and rear lane

Situation: A cafe owner wants coverage of the front counter, customer entry, till area, and a rear service door opening into a poorly lit lane.

Solution used: Fixed cameras on the predictable internal scenes, with a stronger low-light or deterrence camera at the rear lane where after-hours risk is different from daytime customer activity.

Why this was chosen: The front-of-house question is ordinary evidence and dispute review. The rear-lane question is after-hours access and a harder night-time scene.

Installation notes: This is the kind of job where one stronger night camera at the rear can add more value than upgrading every camera on the site.

Example: warehouse office plus loading area

Situation: A small warehouse operation needs coverage at the front office, roller door, loading apron, and internal stock movement corridor.

Solution used: IP cameras with a stronger NVR path, fixed cameras on the key access points, and a more considered network layout so the external and internal views were not all forced into one awkward recorder location.

Why this was chosen: The site had enough complexity that recorder headroom, storage, and cable structure mattered just as much as the cameras themselves.

Installation notes: This is the kind of job where a switch-based design can be cleaner than trying to home-run everything to the NVR just because the NVR has PoE ports.

Where to go next

If the next question is brand, use the brand guides. If the next question is site type, use the industry guides.

Brand guides

Industry guides

Practical next step

If you are still not sure what suits the site, send through a rough floor plan or a few photos of the main entry points, driveway or yard, the likely recorder location, and any difficult night scenes. That usually narrows the camera, recorder, storage, and night-vision choices much faster than continuing to compare specs in isolation.

Frequently Asked Questions

What is the best place to start when buying CCTV?
Start with the site and the questions the system needs to answer later. In simple terms, decide what needs to be seen, how far back footage may need to be reviewed, and whether the site is a home, small business, or larger commercial environment before comparing brands.
Should I choose IP CCTV or coax and TVI?
IP is usually the stronger choice on new cabling, expansion-minded jobs, and sites that want easier recorder and switch design. Coax and TVI still make sense on retrofit jobs where the existing cabling is usable and the main goal is to modernise the system without rewiring everything.
Is 8MP always better than 4MP or 6MP?
Not automatically. 8MP is useful when the scene is wider or the owner wants more crop margin, but 4MP and 6MP are often the more sensible fit on standard entries, corridors, counters, and smaller external approaches.
Do I need a PoE switch as well as an NVR?
Sometimes. Small systems may run neatly from a PoE NVR alone, but larger sites, multi-building layouts, or longer cable paths often push the design toward one or more PoE switches as part of the camera network.
What is the difference between home CCTV and business CCTV?
Home CCTV usually revolves around doors, driveways, garages, side paths, and parcel or vehicle review. Business CCTV usually adds customer movement, staff-only areas, stock or asset exposure, audit trail expectations, and more structured retention and user permissions.
What tools should I use before buying?
The main practical tools are the CCTV Storage Calculator, Camera Planner, UPS Backup Time Calculator, CCTV Signage Generator, and Resolution Simulator. They help turn broad assumptions into a more usable system design.