Hikvision DVR Buying Guide
If you already have coaxial cable in the building, a DVR is almost always the cheaper system — and modern ones are far better than their reputation suggests. This guide explains the Hikvision DVR range in plain terms: what the model letters mean, which recorder suits which site, and several limitations buried in the datasheets that nobody else publishes.
Start here: DVR or NVR?
The honest answer is that it usually depends on what cable is already there.
| DVR (this guide) | NVR | |
|---|---|---|
| Cable | Coax (RG59) — often already installed | Ethernet — usually a new run |
| Camera power | Separate supply, or PoC over the same coax | PoE from the recorder |
| Distance | Up to 800m at 1080p | 100m without a switch |
| Where the AI runs | In the recorder | In the camera |
| Top resolution | 8MP | 32MP |
Rewiring a building is the expensive part of any CCTV job. If coax already runs to every camera position, a DVR upgrade is usually a recorder-and-camera swap. If you are starting from bare walls, or want resolutions above 8MP, read our NVR buying guide instead.
The single best reason to buy a modern DVR
On Hikvision's AcuSense (M-series) DVRs, the analytics run in the recorder, not in the camera. Motion Detection 2.0 is enabled by default on every analogue channel and classifies what moved, separating people and vehicles from leaves, headlights, rain and animals.
That means your existing analogue cameras gain people-and-vehicle filtering without being replaced. On an IP system you would have to buy AcuSense cameras to get the same benefit — here the recorder does it for cameras that may be ten years old.
For a site drowning in false alarms — the ones everybody eventually mutes, and then misses the one that mattered — swapping the recorder alone often fixes it. It also lets you search recordings by object or event type rather than scrubbing through hours by time.
Reading the model number
Hikvision packs a lot into a DVR model number. Once you can read it, the range makes sense:
| Part | Meaning |
|---|---|
| iDS vs DS | iDS = AcuSense. Plain DS has no people/vehicle classification |
| 72xx / 73xx / 90xx | Chassis family — 73xx and 90xx are the larger, rack-mount ranges |
| 04 / 08 / 16 / 32 | Coax channel count |
| HQHI | Records up to 3K / 5MP Lite |
| HUHI | Records up to full 5MP, accepts 8MP cameras |
| HTHI | True 8MP on every channel |
| M1 / M2 / M4 / M8 | Number of drive bays |
| /P or /PXT | PoC — powers cameras over the coax |
| K-series | Older generation, no AcuSense |
The 8MP trap: HUHI and HTHI are not the same
This is the most expensive misunderstanding in the DVR range, and no competitor publishes it.
Both HUHI and HTHI recorders are sold as handling 8MP cameras. They do not handle them the same way:
| HUHI | HTHI | |
|---|---|---|
| 8MP recording | Channel 1 only, at 8 fps | Every channel, at 12–15 fps |
| Other channels | 8MP Lite | Full 8MP |
| Bitrate ceiling | 10 Mbps | 16 Mbps |
Buy four 8MP cameras and pair them with an HUHI recorder, and you get one true 8MP recording. The other three record at Lite — a reduced pixel count carrying the same name.
It is a footnote in the datasheet, not a fault, but it decides which physical socket your most important camera goes into. If your cameras are 8MP, buy HTHI. If they are 5MP or below, HUHI costs less and will serve you perfectly.
The channel-lock trap on the 4-bay and 8-bay models
On every /S model, advanced perimeter protection runs only on specific physical channels — not on any channel you choose:
| Model | Perimeter channels | Which ports |
|---|---|---|
| iDS-7316HUHI-M4/S | 8 | 1–4 and 9–12 |
| iDS-7332HUHI-M4/S | 16 | 1–4, 9–12, 17–20, 25–28 |
| iDS-7332HQHI-M4/S | 8 | 1–4 and 17–20 |
| iDS-9016HUHI-M8/S | 8 | 1–4 and 9–12 |
Wire thirty-two cameras in order and the ones on channels 5 to 8 get no perimeter analysis at all — and nothing on screen tells you why those views behave differently.
Motion Detection 2.0 does still run on every analogue channel, so no camera is left without any classification. It is the advanced line-crossing and intrusion analysis that is port-restricted. Plan the channel map before the install, and we will happily do it with you.
PoC: one cable per camera
On a normal coax install each camera needs video cable and a power run back to a PSU. A PoC recorder sends 48V down the coax instead: one cable per camera, no power supply box, no spur to fuse, no socket at height.
On a retrofit where the coax is sound but the power runs are tired, this is the difference between a swap and a rewire. Two things to know:
- It requires Hikvision PoC cameras. Ordinary HD-TVI cameras work on the video but still need their own supply.
- The power arrangement changes with size: the 4 and 8-channel PoC models use an external 48V brick; the 16-channel iDS-7216HUHI-M2/PXT runs straight off mains.
PoC models also tend to be better equipped: 12TB disk support instead of 10TB, alarm I/O fitted as standard, and USB 3.0. The premium over the non-PoC version is often under £10.
Where each tier steps up
4K output, gigabit networking and 256 Mbps of bandwidth do not arrive at the same point in every tier — which catches people comparing on channel count alone:
- HQHI: you must reach 16 channels (iDS-7216HQHI-M1/XT). The 4 and 8-channel models are 1080p output on a 10/100 port.
- HUHI: they arrive at 8 channels (iDS-7208HUHI-M1/X) — only about £30 above the 4-channel, for a materially better machine.
The suffix rule: options cannot be added later
Where a Hikvision datasheet says a feature is optional, a suffix on the model number tells you which options are actually fitted. The iDS-7208HUHI-M1/XT/4A+8/4ALM is the standard M1/XT with 4 audio inputs and 8/4 alarm I/O built in.
These are factory options and cannot be retrofitted. If the system needs to trigger recording from an alarm panel, PIR or door contact, order the optioned version — buying the standard model to save twenty pounds means replacing the recorder later.
Choose by channel count
4 channels — homes and small shops
- iDS-7204HQHI-M1/XT — the entry point
- iDS-7204HUHI-M1/XT — 5MP, double the analytics
- iDS-7204HUHI-M1/PXT — the PoC version
- iDS-7204HTHI-M1/XT — true 8MP on all four channels
8 channels — the most common size
- iDS-7208HQHI-M1/XT — value tier. Note: its three AI modes are mutually exclusive
- iDS-7208HUHI-M1/S(C) — adds Enhanced IP mode, but has no alarm I/O
- iDS-7208HUHI-M1/X — 4K output and gigabit
- iDS-7208HUHI-M1/XT/4A+8/4ALM — audio and alarm fitted
- iDS-7208HUHI-M2/PXT — PoC with two bays
- iDS-7208HTHI-M2/XT — true 8MP, two bays. The best pairing for 8MP cameras
16 channels — commercial units, schools, farms
- iDS-7216HQHI-M1/XT — 4K and gigabit arrive here on the HQHI tier
- iDS-7216HUHI-M2/XT — 5MP, two bays, 16-ch perimeter
- iDS-7216HUHI-M2/PXT — as above with PoC, mains powered
- iDS-7316HUHI-M4/S — four bays, dual gigabit, up to 34 IP channels
- DS-7316HTHI-K4 — K-series, 8MP, four bays. No AcuSense, but keenly priced
32 channels and up — estates and large sites
- iDS-7232HQHI-M2/XT — 32 channels, two bays
- iDS-7332HQHI-M4/S — four bays, value tier
- iDS-7332HUHI-M4/S — the flagship: 320 Mbps, up to 96 cameras, 16-ch perimeter
- iDS-9016HUHI-M8/S — eight bays and 16 audio inputs. Bought for retention, not camera count
Encoders — keep the cameras, join the IP system
If you already run an NVR or VMS and want existing coax cameras to join it, an encoder converts their video to network streams:
- iDS-6704HUHI-M — 4 channels
- iDS-6716HUHI-M — 16 channels, with AcuSense, two bays and alarm I/O
Note that neither has an HDMI or VGA output — they are network-managed, not sat in front of.
Storage: the number people underestimate
Drive bays decide retention, not channel count. Eight 8MP cameras generate roughly four times the data of 1080p, so a single-bay recorder that suits a 1080p system will fill in days at 8MP.
Every recorder here is supplied without disks. Use surveillance-rated drives such as WD Purple — desktop drives are not built for continuous writing and fail early. Size it properly with our CCTV storage calculator.
A rule of thumb: two bays across sixteen cameras is weeks; four bays is months. If a licence condition sets a retention period, work backwards from that.
What they're like to live with
Worth knowing, because it is where a system either gets used or gets ignored:
- A five-step startup wizard gets a recorder configured without a manual
- Plug and play for cameras — they are detected and configured automatically
- No-plug-in live view and playback in a browser, so no ActiveX or Java
- Password retrieval and reset without a factory visit — genuinely useful when a site changes hands
- OTA firmware upgrades over the internet, rather than USB sticks at each site
- Hik-Connect for phone access, and Hik-Partner Pro for installers managing many sites
Common questions
Can I use my existing coax cable?
Usually yes — that is the main reason to choose a DVR. HD-TVI runs over the same RG59 as older analogue systems, so an upgrade is normally a recorder-and-camera swap rather than a rewire.
Will my old analogue cameras still work?
Yes. Every BNC input self-adapts to HD-TVI, AHD, HDCVI and CVBS, so you can mix old and new and replace cameras gradually.
What is the difference between HQHI, HUHI and HTHI?
They are resolution tiers. HQHI records up to 3K / 5MP Lite, HUHI handles full 5MP and accepts 8MP cameras, and HTHI records true 8MP on every channel.
Do I need AcuSense cameras for AcuSense to work on a DVR?
No — and this is the key difference from an IP system. The classification runs in the recorder, so ordinary analogue cameras on a BNC channel get people and vehicle filtering with no camera upgrade.
How many cameras can a DVR take in total?
More than the model number suggests. Most take IP cameras as well as coax — the 32-channel iDS-7332HUHI-M4/S accepts up to 64 IP cameras on top of its 32 coax channels, for 96 in total.
Does a DVR come with a hard drive?
No. Every recorder here is supplied without disks, so budget for surveillance-rated drives separately.
What does PoC mean?
Power over Coax — the recorder powers the cameras through the same cable that carries the video, so each camera needs one cable and no separate power supply. It requires Hikvision PoC cameras.
Can I view my DVR on my phone?
Yes, through the Hik-Connect app, over broadband or a mobile connection. No fixed IP address is needed.
Still not sure?
Tell us how many cameras, what resolution they are, what cable is already in the building, and how long footage has to be kept. That is enough for us to name the right recorder and do the storage arithmetic — and to say so if a cheaper model would do the job.
Contact us, call 01902 902251, or visit the Wolverhampton trade counter, where recorders run live so you can try the interface before you buy.
Also worth reading: our Hikvision NVR buying guide and Hikvision IP camera buying guide.