Network Video Recorders (NVRs)

Network Video Recorders (NVRs) provide centralized recording and management for IP surveillance systems. Select an NVR based on camera count, resolution requirements, retention targets, and long-term storage scalability to ensure reliable commercial deployments.

Plan Your Deployment

Camera count and resolution requirements
Retention period and storage capacity planning
Throughput and recording bandwidth limits
RAID configuration and redundancy strategy
Remote access and VMS integration needs

Buying Guide Storage Planning Guide Get Recommendations

Sub categories

Desktop NVRs

332 items

NVR Accessories

20 items

Rack-Mount NVRs

211 items

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Hanwha

SKU: XRN-3220RB2-48TB

Hanwha XRN-3220RB2 32-Channel 8K NVR 48TB

32-channel 8K NVR with 48TB storage for enterprise surveillance
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Hanwha

SKU: XRN-3220RB2-8TB

Hanwha XRN-3220RB2 32-Channel 8K NVR 8TB

32-channel 8K NVR with 8TB storage for 32MP camera systems
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Hanwha

SKU: XRN-3220RB2-32TB

Hanwha XRN-3220RB2 32TB 8K 32-Channel NVR

32-channel 8K NVR with 32TB storage and 520 Mbps bandwidth
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$9,107.00 $5,941.99 Save $3,165.01

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Hanwha

SKU: XRN-420S-2TB

Hanwha XRN-420S-2TB 4-Channel 8MP NVR

4-channel 8MP NVR with integrated PoE+ and H.265 compression
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Hanwha

SKU: XRN-420S-4TB

Hanwha XRN-420S-4TB 4-Channel 8MP Network Video Recorder

4-channel 8MP NVR with PoE+ power and H.265 compression
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Hanwha

SKU: XRN-420S-6TB

Hanwha XRN-420S-6TB 4CH Network Video Recorder

4CH 8MP NVR with integrated PoE+ and 6TB storage for small deployments
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Hanwha

SKU: XRN-426S-1T

Hanwha XRN-426S-1T 4-Channel NVR Recorder

4-channel PoE+ NVR with 8MP recording and 1TB onboard storage
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Hanwha

SKU: XRN-6420DB4-128TB

Hanwha XRN-6420DB4 64-Channel 8K NVR 128TB

64-channel 8K NVR with 128TB storage for enterprise surveillance
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$28,160.00 $17,735.99 Save $10,424.01

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Hanwha

SKU: XRN-6420DB4-140TB

Hanwha XRN-6420DB4 64-Channel 8K NVR 140TB

64-channel 8K NVR with 140TB storage for enterprise surveillance
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Hanwha

SKU: XRN-6420DB4-160TB

Hanwha XRN-6420DB4 64-Channel 8K NVR 160TB

64-channel 8K NVR with 160TB storage for large-scale deployments
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Hanwha

SKU: XRN-6420DB4-24TB

Hanwha XRN-6420DB4 64-Channel 8K NVR 24TB

64-channel 8K NVR with 24TB storage for large-scale surveillance
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Hanwha

SKU: XRN-6420DB4-48TB

Hanwha XRN-6420DB4 64-Channel 8K NVR 48TB

64-channel 8K NVR with 48TB storage for large-scale deployments
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Hanwha

SKU: XRN-6420DB4-88TB

Hanwha XRN-6420DB4 64-Channel 8K NVR 88TB

64-channel 8K NVR with 88TB storage and 520 Mbps bandwidth
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$21,960.00 $14,140.99 Save $7,819.01

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Hanwha

SKU: XRN-6420DB4-96TB

Hanwha XRN-6420DB4 64-Channel 8K NVR 96TB

64-channel 8K NVR with 96TB storage for large-scale deployments
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$23,200.00 $14,859.99 Save $8,340.01

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Hanwha

SKU: XRN-6420DB4-64TB

Hanwha XRN-6420DB4 64TB 8K NVR Intel-Based

64-channel 8K NVR with 64TB storage and Intel 12th-gen processor
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$18,240.00 $11,121.99 Save $7,118.01

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Hanwha

SKU: XRN-6420DB4-16TB

Hanwha XRN-6420DB4-16TB 64-Channel 8K Network Video Recorder

64-channel 32MP NVR with 16TB base storage and 520 Mbps bandwidth
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Browse by Product Family

Click through to shop the families that fit your network video recorders (nvrs) deployment.

Compact & Small-Scale NVRs (1–16 Channels)

Entry-level and mid-range recorders for small facilities, branch locations, and retrofit installations. Ideal for budget-conscious integrators managing single-building or multi-site deployments with modest camera counts.

Mid-Range NVRs (16–64 Channels)

Scalable recorders for multi-floor offices, retail chains, and campuses. Balances storage density, throughput, and PoE/power budgets without requiring separate backbone infrastructure.

Enterprise & High-Density NVRs (64+ Channels)

Distributed or centralized hub recorders for large facilities, transportation, and complex integrations. Handles sustained bitrate, redundancy, and long-term retention at scale.

PoE-Powered NVRs (Integrated Switch)

All-in-one recorders with built-in PoE switching. Eliminates separate switch requirement for small-to-medium deployments and simplifies cabling and power distribution.

4K/Ultra-HD Recording NVRs

Recorders optimized for 4K, 5MP, and 8MP camera streams. Requires careful bitrate and storage planning to avoid frame-rate drops and bandwidth collapse.

Rackmount & Modular NVRs

Industrial-grade, server-form-factor recorders for data centers, server rooms, and multi-tenant deployments. Built for redundancy, serviceability, and long MTBF.

What to Look For When Buying

The decisions that matter most before you spec.

Real Bitrate vs. Rated Camera Count

NVRs are often rated for more cameras than they can actually process simultaneously at rated resolution and frame rate. Before purchase, calculate total ingress bitrate: sum camera bitrate × number of cameras, then confirm the NVR's sustained throughput (not peak). See Why Your NVR Can't Handle Its Rated Camera Count for real-world examples.

Storage Throughput & Disk Selection

NVR write speed is limited by disk throughput, not capacity alone. A 4-camera 4K system can exceed 100 Mbps sustained writes; mismatched drive selection causes dropped frames and gaps. Pair your NVR with surveillance-grade drives rated for 24/7 streaming and validate RAID configuration matches your retention math.

Retention Calculation & Scaling

Storage lifetime depends on bitrate, motion-detection settings, and frame-rate. A 30-day retention target for 16 cameras at 4 Mbps each = ~1.7 TB minimum. Factor in overhead, RAID redundancy, and growth. Read Retention Math for IP Cameras: Bitrate, Motion, Storage Traps to avoid undersizing.

Network & Power Infrastructure Readiness

Large NVR deployments collapse when backbone switches, PoE injectors, or UPS capacity aren't sized for sustained load. Why Surveillance Networks Collapse at the Core explains bandwidth and redundancy planning. Verify your switch, network cabling, and power distribution before finalizing the recorder choice.

Vendor Support & Software Compatibility

NVR firmware, mobile app stability, and remote access reliability vary widely. Select brands like Hikvision, Hanwha, Axis, and Vivotek with proven field track records and transparent changelog/SLA terms. Evaluate Video Management Software (VMS) integration early to avoid vendor lock-in.

Redundancy, Failover & Incident Reliability

Single NVR failure or network outage can blind an entire facility during critical incidents. Architect dual-recorder setups, redundant storage, or Why Surveillance Systems Fail During Incidents to ensure continuous recording. For multi-site deployments, plan for isolated recording at each location and centralized backup.

Technology Stack

The specs and acronyms that actually affect network video recorders (nvrs) performance.

Bitrate (Mbps)

The sustained network and storage bandwidth required per camera stream. Measured in megabits per second. Lower bitrate = longer retention on same storage; too low = lost detail. NVR throughput (e.g., 200 Mbps) must exceed sum of all camera bitrates to avoid frame drops.

PoE Budget (Watts)

Power delivered over Ethernet to cameras. Standard PoE = 15W per port; PoE+ = 30W; PoE++ = 60W or more. Verify NVR's built-in PoE power supply or external injector can supply total wattage for all connected cameras simultaneously, not just nameplate rating.

RAID Configuration (0, 1, 5, 6, 10)

Storage redundancy method. RAID 1 (mirroring) = 50% usable capacity but fast recovery; RAID 5 (striping + parity) = ~67–75% usable, slower rebuild; RAID 6 = dual-parity, safest but slower writes. Choose based on RTO/RPO and disk failure tolerance for your facility.

Frame Rate (FPS) & Resolution

Higher resolution and frame rate increase bitrate non-linearly. 4K 30 FPS ≈ 50–100 Mbps per camera; 1080p 30 FPS ≈ 4–8 Mbps. NVR must deliver rated FPS across all channels simultaneously; frame-rate reduction under load is common and often undisclosed in specs.

Onboard Storage vs. Expansion

Some NVRs include 1–8 TB of internal drive bays; others accept only external SAN or NAS. Modular expansion via USB, SATA, or NAS allows scaling beyond internal capacity but introduces network latency and single-point-of-failure risk if not redundant.

HDMI/VGA Output & Multi-Monitor

Direct video output for live playback and alarm response. Dual HDMI or DVI enables multi-monitor wall displays for SOC operations. Check Monitors & Displays for compatible wall-mount and Joystick & Keyboard Controls for operator interfaces.

Typical Deployment Scenarios

Small Office (8 Cameras, 30-Day Retention)

One 8-channel compact NVR (e.g., entry-level Hikvision or Hanwha model) with 2–4 TB internal RAID 1 storage. Built-in PoE switch powers cameras; single gigabit uplink to office network. Total bitrate ~32–48 Mbps; UPS protects against brief power loss. Cost: $800–$1,500 all-in.

Retail Chain (4 Stores, 16 Cameras Each, Centralized Backup)

Four 16-channel mid-range NVRs deployed locally at each store location, each with 4–6 TB RAID 5 storage for 14-day retention. Nightly backup to central NAS or cloud via WAN. If one location's NVR fails, other three continue recording; central system rebuilds from backups. Requires network redundancy and Why Surveillance Standards Collapse After the Third Location planning.

Campus/Large Facility (64+ Cameras, Hybrid Storage)

One or two enterprise-class 64-channel rackmount NVRs in data center with 24–48 TB SAN or modular expansion. Satellite 16-channel NVRs at building entrances for local failover. Total bitrate 400+ Mbps; redundant gigabit backbone, dual switches, and Why Large Surveillance Systems Fail: Storage Throughput Reality mitigation. Integrate Video Management Software (VMS) for unified search and forensics.

High-Resolution Mixed Deployment (32 × 1080p + 8 × 4K, 60-Day Retention)

32-channel NVR rated for 4K + lower-res mixing. 1080p cameras = ~6 Mbps each (192 Mbps); 4K = ~60 Mbps each (480 Mbps); total ~672 Mbps. Verify NVR sustains this; may require two units or careful frame-rate reduction. 12–16 TB RAID 6 storage. Cross-reference Retention Math for IP Cameras: Bitrate, Motion, Storage Traps to confirm math.

Frequently Asked Questions

What's the difference between an NVR and a DVR?

A DVR (Digital Video Recorder) uses analog coax cameras and a capture card; an NVR (Network Video Recorder) receives IP camera streams over Ethernet. NVRs are now standard because they enable remote access, higher resolution, PoE power, and easier scaling. DVRs are legacy for most new deployments.

How do I calculate how much storage I need?

Multiply bitrate per camera (Mbps) × number of cameras × 86,400 seconds/day × retention days ÷ 8 bits/byte = total bytes. Example: 5 cameras × 5 Mbps × 86,400 × 30 days ÷ 8 = ~810 GB. Add 20–30% overhead for RAID and metadata. See Retention Math for IP Cameras: Bitrate, Motion, Storage Traps for detailed examples.

Can I mix camera brands and resolutions on one NVR?

Yes, most modern NVRs accept ONVIF-compliant IP cameras from any vendor (Hikvision, Axis, Vivotek, etc.) and mix 1080p, 2MP, 4K, and other resolutions on the same recorder. However, bitrate and frame-rate planning becomes critical; lower frame rates or bitrate reduction may occur if total throughput is exceeded.

What happens if my NVR storage fills up?

Most NVRs default to overwrite mode: oldest video is deleted to make room for new recording. Some support redundancy via dual RAID arrays or remote backup. Prevent accidental loss by setting up automated export to NAS, VMS archive, or cloud; verify RAID type protects against single-disk failure.

Do I need a separate switch if my NVR has PoE?

If your NVR has integrated PoE ports and all cameras connect directly to it, no external switch is needed. However, if you have more cameras than PoE ports or need network redundancy, add a managed PoE switch upstream. Always verify the NVR's PoE wattage budget covers all cameras simultaneously.

What's the best way to ensure my NVR doesn't fail during an incident?

Deploy Why Surveillance Systems Fail During Incidents architecture: local recording at multiple sites, UPS backup, network redundancy, and regular backup to offsite NAS or cloud. Test failover quarterly. Use RAID 6 or mirrored storage, and avoid single points of failure in power, network, and storage paths.

Related Categories

Adjacent equipment that typically ships alongside these products.

Video Management Software (VMS) NVR Hard Drives & Storage Encoders & Decoders Monitors & Displays Video Recording Servers Workstations & Terminals Joystick & Keyboard Controls

Engineering Reading

Deep-dives from our engineering team on deployment planning.

Why Surveillance Systems Fail During Incidents Why Your NVR Can't Handle Its Rated Camera Count Why Surveillance Networks Collapse at the Core Why Large Surveillance Systems Fail: Storage Throughput Reality Why Surveillance Standards Collapse After the Third Location Why 4K Cameras Fail at Night Why Your PoE Switch Fails After 18 Cameras Frame Rate vs. Reality: When 30 FPS Makes Your System Worse