NVR / Recorders › NVR501-04B-P4 / 08B-P8
Uniview (UNV)NVR501-B-P Series · 1× SATA HDD
1-HDD PoE Network Video Recorder · B-P Series
NVR501-04B-P4 / 08B-P8
4 / 8-channel PoE network video recorder — built-in 4/8-port PoE, Ultra 265 compression, 4K HDMI output, records cameras up to 16MP, with onboard Face Detection and VCA search.
16MP · max recordingUltra 265 · low storage4/8× PoE · built-in ports1× SATA · up to 24 TB4K HDMI · + VGA simultaneous38 languages · local interface
Choose your size — two models on this page
Rule of thumb: count your PoE cameras, then leave room to grow — a shop with 3 cameras plugs straight into the 04B-P4; pick the 08B-P8 if you may add cameras later. Highlighted rows in the spec table below show every difference between the two.
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How many terabytes for your channels and days? Use the storage calculator →
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The Uniview NVR501-B-P Series is a 1-HDD PoE network video recorder offered in two sizes: NVR501-04B-P4 (4-ch, 4-port PoE) and NVR501-08B-P8 (8-ch, 8-port PoE). Both record cameras up to 16MP with Ultra 265 / H.265 / H.264 compression, output simultaneously over 4K HDMI and VGA, and include built-in Face Detection, Intrusion Detection (SIP) and Ultra Motion Detection (UMD) feeding VCA search. One SATA bay takes a hard disk up to 24 TB; the local interface is available in 38 languages including Spanish (Latin America), Portuguese (Brazil) and French.
Is this the right recorder for you?
Plain-language guide for buyers and installers — based only on what this recorder actually does.
Small shops with PoE camerasBuilt-in 4/8-port PoE — plug cameras straight into the recorder, no separate PoE switch or extra cabling to buy.
Growing businessesBuy channels you don't use yet: the 08B-P8 lets you add PoE cameras later without replacing the recorder.
Remote viewing on phoneP2P protocol built in — the owner checks the shop from a phone app without a fixed IP or network skills.
Local-language interface38 GUI languages including Spanish (Latin America), Portuguese (Brazil) and French — your customer operates it in their own language.
Longer video retentionUltra 265 roughly halves file size versus H.264 — the same 24 TB disk keeps weeks more footage.
Rack-mounted installsAn optional 1U rack mount (RM-1U-260) is available for this chassis — tidy server-room installs alongside other 1U gear.
Not the right pick if you need…
- Gigabit network uplink — the built-in network port is 10/100M (matched to this series' 80 Mbps bandwidth)
- A second hard disk or RAID — this series has a single SATA bay
- Serial PTZ control from the NVR itself — RS485 and RS232 are both listed N/A on this series
- Physical alarm input/output terminals — Alarm In and Alarm Out are both N/A on the rear panel
- Extra PoE budget for high-draw cameras — each port is capped at 30 W (standard PoE/PoE+, not PoE++ 60W+ devices)
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Key Features
Complete list from the official datasheet.
Support Ultra 265/H.265/H.264 video formats
4/8-channel input
Plug & Play with 4/8 independent PoE network interfaces
Support HDMI and VGA simultaneous output
Up to 16 Megapixels resolution recording
ANR technology to enhance the storage reliability when the network is disconnected
Support cloud upgrade
Cameras plug in. The recorder watches for you.
Two real capabilities that define this series: built-in PoE and onboard Smart by IPC detection.
PLUG & PLAY POE
No separate PoE switch to buy
Each RJ45 port is independent PoE — up to 30 W per port, 50 W total on the 04B-P4 or 75 W total on the 08B-P8 (IEEE 802.3at/af) — plug cameras straight into the recorder.
SMART BY IPC
Real alerts, not hours of nothing
Built-in Face Detection, Intrusion Detection (SIP) and Ultra Motion Detection (UMD) run on up to 8 channels (4 on the 04B-P4), feeding Face Snapshot Search, Motor/Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report and Heat Map — search by event, not by scrubbing the timeline.
Which size fits your project?
Bars show camera capacity per model. Click the model buttons above to switch — the spec table highlights every other difference.
NVR501-04B-P44-ch input · 4-port PoE, 50 W total · live view split 1/4
4cameras
NVR501-08B-P88-ch input · 8-port PoE, 75 W total · live view split 1/4/6/8/9
8cameras
Who uses it, where it goes and how to install it
Written for the NVR501-04B-P4 and NVR501-08B-P8 from the official datasheet: 4 or 8 channels with matching built-in PoE ports (50 W or 75 W total), 80 Mbps incoming, 1 SATA bay up to 24 TB at rooms up to 40 °C, 4K HDMI + VGA, 260 mm case with optional 1U rack mount.
Which size suits which installation
- NVR501-04B-P4: up to 4 cameras, fixed for good — A small office, pharmacy or house with 2–4 PoE cameras: 4 ports, 50 W in total and 20 Mbps of the 80 Mbps input per camera, so even 4K cameras have headroom. There is no way past 4 channels later.
- NVR501-08B-P8: 5–8 cameras, or 4 now and more later — Restaurants, small warehouses and schools: 8 PoE ports with 75 W, live view up to 9 windows and corridor layouts up to 9 — useful for long, narrow scenes such as aisles.
- Installers who mount gear in a rack — Unlike the compact LP version, this chassis takes the optional RM-1U-260 1U rack mount, so the recorder sits next to the router and patch panel in a 19-inch cabinet.
- Sites in warm climates — The datasheet allows the largest disks with the room at up to 40 °C on this P version, versus 35 °C on the compact LP version — a real margin in a shop back-room without air conditioning.
Where and how to install the recorder
- Rack or shelf, with air around it — Mount it in a 19-inch cabinet with the RM-1U-260 kit, or stand it on a shelf; do not stack other hot equipment directly on top. In a closed cabinet add a fan or vent panel, and keep the room at 40 °C or less if you fit a very large disk.
- Power: original adapter plus UPS — All camera power comes from the NVR's adapter (DC 48 V / 1.35 A for the 04B-P4, DC 52 V / 1.8 A for the 08B-P8). One UPS on the recorder and router keeps every PoE camera alive in a blackout — size it for roughly 65 W or 95 W, the adapter's rating.
- One surveillance disk, sized for the retention — There is a single SATA bay and no RAID, so the disk is the only copy: use a surveillance-grade drive, check the Disk Abnormal / Disk Offline alerts are sent to the owner, and export important clips to USB (1 × USB 2.0 and 1 × USB 3.0 on the rear).
- Camera cables to the PoE ports — Each camera gets its own Cat5e/Cat6 copper run of up to 100 m to a rear PoE port; ports are 802.3af/at, max 30 W each. Bring cables into the cabinet through a brush or grommet, use outdoor cable and a junction box at the camera, and add surge protectors where cables run along outside walls or poles.
- LAN, monitor and audio — Plug the single 10/100M LAN port into the router for P2P remote access. Use HDMI for a 4K monitor and VGA for a second screen at the same time. The RCA audio in/out can drive an amplified speaker and a microphone for one channel of two-way talk.
Planning table: channels, PoE, bandwidth, disk and retention
The two sizes differ only in channels, PoE ports, PoE budget, adapter and live-view layouts; the chassis, disk bay and 80 Mbps input are shared. Doubling the cameras on the same disk halves the days of recording.
| NVR501-04B-P4 | NVR501-08B-P8 | |
|---|---|---|
| IP channels / built-in PoE ports | 4 / 4 | 8 / 8 |
| PoE budget | 50 W total, max 30 W per port | 75 W total, max 30 W per port |
| Average PoE per port if all are used | 12.5 W | 9.4 W |
| Incoming bandwidth (shared evenly) | 80 Mbps (20 Mbps per camera) | 80 Mbps (10 Mbps per camera) |
| Hard disk | 1 × SATA, up to 24 TB (room ≤ 40 °C) | 1 × SATA, up to 24 TB (room ≤ 40 °C) |
| Full-quality decoding (H.265) | 4 × 4K@30 | 4 × 4K@30, 6 × 5MP@30, 8 × 4MP@30 |
| Live view / corridor layouts | 1/4 · 3/4 | 1/4/6/8/9 · 3/4/5/7/9 |
| Days on a 4 TB disk, every channel at 4 Mbps | ≈23 days | ≈11.6 days |
| Days on a 24 TB disk, every channel at 4 Mbps | ≈139 days | ≈69 days |
| Case / mounting | 260 × 222 × 47 mm, RM-1U-260 optional | 260 × 222 × 47 mm, RM-1U-260 optional |
- Pick the NVR501-04B-P4 when 4 cameras is the final count: each gets 20 Mbps of input and up to 12.5 W on average, so 4K or heated cameras fit comfortably.
- Pick the NVR501-08B-P8 for more than 4 cameras or future growth; if all 8 run at once, plan about 9.4 W per camera and an 8 TB or larger disk for 3 weeks or more of footage.
- Prefer a smaller box on a desk? The NVR501-04B-LP4 / 08B-LP8 has the same recording and PoE figures in a 205 mm case, but its largest-disk limit is 35 °C.
Retention = disk TB × 10^12 ÷ (cameras × bitrate ÷ 8 × 86400 s), assuming 4 Mbps per camera (a typical 4 MP H.265 stream recording 24 h; your scene and settings change it). Average PoE per port = total budget ÷ ports. All other values are from the official datasheet.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the two models:NVR501-04B-P4 · 4-chNVR501-08B-P8 · 8-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 04B-P4 · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30 | H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@3008B-P8 · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30, 6×5MP@30, 8×4MP@30 | H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@30, 6×4MP@30, 8×3MP@30 |
| Decoding Capability Description | The resolution of each channel cannot exceed 8192 pixels in length and 4096 pixels in width |
| Audio Compression | G.711A, G.711U |
Network
| Incoming Bandwidth | 80 Mbps |
| Outgoing Bandwidth | 64 Mbps |
| Remote Users | 128 |
| Protocols | TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP, RTSP, IPv6, IPv4 |
| Browser (Plugin) | IE10, IE11, Chrome 45+, Edge 79+, Firefox 52+ |
Video/Audio Input
| IP Video Input | 04B-P4 · 4-ch08B-P8 · 8-ch |
| RCA Audio Input | 1-ch |
Video/Audio Output
| HDMI Output | 4K (3840 × 2160)/30 Hz, 1920 × 1080/60 Hz, 1920 × 1080/50 Hz, 1600 × 1200/60 Hz, 1280 × 1024/60 Hz, 1280 × 720/60 Hz, 1024 × 768/60 Hz |
| VGA Output | 1920 × 1080/60 Hz, 1920 × 1080/50 Hz, 1600 × 1200/60 Hz, 1280 × 1024/60 Hz, 1280 × 720/60 Hz, 1024 × 768/60 Hz |
| RCA Audio Output | 1-ch |
| Liveview Display | 04B-P4 · 1/408B-P8 · 1/4/6/8/9 |
| Corridor Mode Screen | 04B-P4 · 3/408B-P8 · 3/4/5/7/9 |
| Two-way Audio | 1-ch, RCA (Using the audio input and output) |
| Snapshot | FTP/Schedule/Event Snapshot; 4-ch snapshot (max. D1 (720 × 576) video resolution, with D1 snapshot resolution) |
Recording
| Recording Resolution | 16 MP/12 MP/8 MP/6 MP/5 MP/4 MP/3 MP/1080P/960P/720P/D1/2CIF/CIF |
Smart
| Smart by IPC | 04B-P4 · Total 4-ch (Face Detection, SIP, UMD)08B-P8 · Total 8-ch (Face Detection, SIP, UMD) |
| VCA Search | Face Snapshot Search, Motor Vehicle Search, Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report, Heat Map |
Alarm
| General Alarm | Defocus Detection, Scene Change Detection, Object Left Behind, Object Removed, Auto Tracking, Motion Detection, Tampering, Human Body Detection, Video Loss, Alarm Input, Audio Detection |
| Alert Alarm | IP Conflict, Network Disconnected, Disk Offline, Disk Abnormal, Illegal Access, Hard Disk Space Low, Hard Disk Full, Recording/Snapshot Abnormal |
GUI Language
| GUI Language | 38 languages: Simplified Chinese, Traditional Chinese, English, Vietnamese, Thai, Turkish, Spanish (Latin America), Portuguese (Brazil), Spanish, Portuguese, French, German, Italian, Dutch, Polish, Czech, Hungarian, Slovak, Russian, Hebrew, Arabic, Ukrainian, Estonian, Bulgarian, Greek, Romanian, Danish, Swedish, Norwegian, Finnish, Croatian, Slovenia, Serbia, Korean, Japanese, Latvian, Lithuanian, Persian |
Hard Disk
| SATA | 1 SATA Interface |
| Capacity | Up to 24 TB for each HDD (the maximum HDD capacity varies with environment temperature and hard disk size, the environment temperature for use should not exceed 40°C) |
External Interface
| Network Interface | 1 RJ45 10 M/100 M self-adaptive Ethernet Interface |
| USB | Rear panel: 1 × USB2.0, 1 × USB3.0 |
| RS485 | N/A |
| RS232 | N/A |
| Alarm In | N/A |
| Alarm Out | N/A |
| Power Supply | 04B-P4 · DC 48 V / 1.35 A08B-P8 · DC 52 V / 1.8 A |
PoE
| PoE Interface | 04B-P4 · 4 RJ45 10 M/100 M self-adaptive Ethernet Interface08B-P8 · 8 RJ45 10 M/100 M self-adaptive Ethernet Interface |
| Max Power | 04B-P4 · Max 30 W for single port, Max 50 W in total08B-P8 · Max 30 W for single port, Max 75 W in total |
| Supported Standard | IEEE 802.3at, IEEE 802.3af |
Working Environment
| Working Temperature | -10 °C to 55 °C (14 °F to 131 °F) |
| Working Humidity | ≤ 90% RH (non-condensing) |
| Power Consumption (without HDD) | ≤ 10 W |
Dimensions
| Weight (without HDD) | ≤ 1.1 Kg (2.43 lb) |
| Dimensions | 260 mm × 222 mm × 47 mm (10.2" × 8.7" × 1.8") |
Certification
| Certification | CE; FCC; UL; RoHS; WEEE |
| CE | EN 55032, EN 61000-3-3, EN IEC 61000-3-2, EN 55035 |
| FCC | Part15 Subpart B |
Dimensions
Engineering drawing reproduced 1:1 from the official datasheet.
unit: mm (in.)
| Dimensions | 260 mm × 222 mm × 47 mm (10.2" × 8.7" × 1.8") |
| Weight (without HDD) | ≤ 1.1 Kg (2.43 lb) |
| Power Consumption (without HDD) | ≤ 10 W |
| PoE Standard | IEEE 802.3at, IEEE 802.3af |
Rear panel — all interfaces
Optional Mounting Accessories
Order together with the camera to save shipping.
RM-1U-2601 HDD 1U NVR Rack Mount
4/8-Channel PoE NVR FAQ — NVR501-B-P Series
How many cameras can the NVR501-08B-P8 power directly?
The NVR501-08B-P8 records 8 IP cameras through 8 built-in PoE ports (75 W total); the NVR501-04B-P4 handles 4 cameras with 4 ports (50 W total). Each PoE port delivers up to 30 W (IEEE 802.3at/af), so typical 4–12 W IP cameras plug straight into the recorder — power and video over one cable, no separate PoE switch needed.
How many hard drives fit and what is the maximum capacity?
One SATA bay, taking a surveillance hard drive up to 24 TB. Use surveillance-rated hard drives; real retention depends on camera count, resolution and bitrate, and Ultra 265 keeps files smaller than H.264 at the same image quality, stretching every terabyte further.
What is the maximum camera resolution it records?
It records IP cameras up to 16 MP, decodes Ultra 265, H.265 and H.264, and drives a monitor at 4K (3840×2160) over HDMI with VGA up to 1080p. Incoming bandwidth is 80 Mbps across all channels.
Does it support face detection and smart search?
Yes, via UNV smart cameras: Face Detection, SIP rules and Ultra Motion Detection on up to 4 channels on the 04B-P4, or 8 channels on the 08B-P8. The NVR indexes these events for VCA Search — face, vehicle, human-body and people-counting search — so you jump straight to the right clip instead of scrubbing hours of video.
Can I view live video remotely?
Yes — up to 128 remote users can connect. The recorder supports P2P, DDNS, HTTP/HTTPS and RTSP and works in a browser (IE10/11, Chrome 45+, Edge 79+, Firefox 52+), so an integrator can check several client sites from one office. Outgoing bandwidth for remote streams is 64 Mbps.
Will it run reliably in hot climates?
The rated working range is -10 °C to 55 °C at up to 90% non-condensing humidity, and the unit draws ≤ 10 W without drives. Give it ventilation and keep it out of direct sun inside equipment cabinets — standard practice for tropical installs.
Does the NVR501-04B-P4 / 08B-P8 fit in a 19-inch rack?
Yes, with the optional RM-1U-260 1U rack mount listed for this series; the chassis is 260 × 222 × 47 mm, so it occupies one rack unit. Order the bracket together with the recorder. Leave the unit above and below free or vented, because the case has no other cooling path in a closed cabinet.
Will the NVR501-04B-P4 / 08B-P8 record my existing cameras from another brand?
ONVIF is not in the official datasheet's protocol list (RTSP is), so send us your camera models to confirm before you order. When a non-Uniview camera is used on a PoE port, the channel normally has to be switched from plug-and-play to manual with the ONVIF protocol, IP, user name and password. Expect video recording only; face, body and vehicle search need cameras that generate those events.
What size UPS do I need for an NVR501-08B-P8 with 8 PoE cameras?
Size the load from the adapter: DC 52 V × 1.8 A ≈ 94 W is the most the 08B-P8 can draw (DC 48 V × 1.35 A ≈ 65 W for the 04B-P4). In practice the load is the recorder (≤ 10 W without disk) plus the disk plus the real camera draw, never more than the 75 W PoE budget. Choose a UPS rated comfortably above that figure plus the router, and pick the battery size for the hours of backup you want.
Should I choose the NVR501-B-P or the compact NVR501-B-LP?
Choose the B-P when the recorder goes in a rack or a warm room: it has the RM-1U-260 rack mount option and its largest-disk limit is 40 °C instead of 35 °C. Choose the B-LP when it sits on a desk or shelf and space matters: 205 × 212 × 46 mm versus 260 × 222 × 47 mm. Channels, PoE budget (50 W / 75 W), 80 Mbps input and decoding are identical on both datasheets.
Can I talk through a camera or record sound with the NVR501-08B-P8?
Yes. The recorder decodes G.711A/G.711U camera audio, and two-way audio is 1 channel through the rear RCA audio input and output, so connect a microphone and an amplified speaker there. Cameras with a built-in mic record sound with the video. Audio Detection is also in the alarm list, for example to flag shouting.
How is the firmware of the NVR501-B-P updated?
The datasheet lists cloud upgrade: with the recorder connected to the internet, it can check for and install new firmware from its menu. On sites without internet, a firmware file can be loaded from a USB stick on the rear USB port; ask us for the correct file for your exact model. Do not power off during an upgrade, which is another reason to have the UPS.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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