A DVR records analog cameras over coaxial cable. An NVR records IP cameras over a network cable. For a new installation, go with an NVR. If good coax is already in the walls, a DVR is fine.
Start with the cameras, not the recorder
People often ask us which recorder to buy. The recorder actually follows the camera. Analog cameras need a DVR. IP cameras need an NVR. So the real question is which type of camera fits your building.
Most of the time that comes down to one thing: is there coaxial cable already installed, and is it in good shape? If yes, a DVR upgrade can be the cheaper route. If you are starting fresh or rewiring anyway, an NVR is the better long-term choice.
NVR vs DVR at a glance
| DVR | NVR | |
|---|---|---|
| Cameras | Analog HD (HD-TVI, HD-CVI, AHD) | IP cameras |
| Cable per camera | Coax for video, plus a separate power cable | One network cable (Cat6) |
| Camera power | Separate power supply | Usually PoE, through the same cable |
| Where video is processed | In the recorder | In each camera |
| Smart alerts | Basic motion detection | More options, like line crossing and intrusion zones |
| Good for | Upgrading a site that already has coax | New sites, and sites that will grow |
How each one works
DVR: the analog camera sends a raw video signal down the coax. The DVR does the work of compressing and saving it. The cameras stay simple and cheap, but every camera needs two cables, one for video and one for power.
NVR: the IP camera compresses its own video and sends it over a network cable. The NVR just stores it. With PoE (Power over Ethernet), that same cable also powers the camera. One cable per camera saves a lot of material and labour on a new site.
Which should you pick?
Choose an NVR if
- you are installing CCTV for the first time, or rewiring anyway
- you want 4MP or sharper on most cameras
- you want alerts like line crossing or intrusion zones
- you may add more cameras later
Choose a DVR if
- the building already has coax in good condition
- you are only replacing old cameras and want to keep cost down
- simple recording is all you need
Choose a hybrid (XVR) if
you have analog cameras that still work and want to add IP cameras over time. One box handles both, so nothing gets thrown out early.
Cost and hard disk space
On equipment alone, a DVR setup is usually cheaper. That changes on a new install, because an IP camera needs one cable where an analog camera needs two. Compare quotes on the full installed cost: cameras, recorder, cable, labour and hard disks.
Both record to hard disks. How much space you need depends on the number of cameras, the resolution and how many days you want to keep. Analog streams usually use more bitrate than IP cameras on H.265, so a DVR can fill a disk faster at the same resolution. Try our CCTV storage calculator with your own numbers.
One more check before you buy new cameras: since 1 April 2026, CCTV cameras sold in India must meet the government's cybersecurity rules. Our STQC CCTV guide shows how to check a model.
Last updated 4 November 2026