Ajax NVR HDC: The First Network Video Recorder with HDMI and Low-Voltage DC Power – Now Available in the UK

If you have been following the Ajax video surveillance range, you will know that until now, installers had to make a compromise. Want HDMI output for local monitoring? You needed the NVR HAC, which runs on 110-240V AC mains power. Prefer low-voltage DC power so the recorder sits on the same supply as your alarm panel? That was the NVR DC, but it had no HDMI output at all. You could not have both.

That changes today. Ajax Systems has released the NVR HDC, a network video recorder that combines HDMI output with low-voltage DC power in one compact unit. It is available in 8-channel and 16-channel versions, and both models are now in stock and ready to order from ERTECH. We have been an authorised Ajax distributor since the brand first entered the UK market, and we are genuinely pleased to see this gap in the range finally filled.

At a Glance – Ajax NVR HDC Key Features

• Two models: NVR HDC (8-ch) and NVR HDC (16-ch)
• HDMI output: 1080p resolution for direct connection to any TV or monitor
• Low-voltage DC power: 8-16V DC (configurable to 12.1-16V DC with jumper)
• Recording resolution: up to 8MP/4K at 25/30 FPS
• Compression: H.265, H.264, and Ajax JetSparrow
• Storage: 1x SATA bay, supports up to 16TB HDD
• Third-party support: ONVIF Profile S/T and RTSP for Hikvision, Dahua, Axis, and more
• Compliance: NDAA compliant, PSTI UK Schedule 1 certified
• Built-in VMS: full video management via HDMI with USB mouse and keyboard
• Mounting: SmartBracket tool-free wall mounting with tamper detection

What Does NVR HDC Stand For?

Ajax uses a clear naming system for its NVR range. Each letter after “NVR” tells you what the unit includes:

• H = HDMI output
• D = DC low-voltage power supply
• C = compact form factor with a single HDD bay

So the NVR HDC gives you HDMI output, DC power input, and a compact single-drive design. Here is how it fits into the broader Ajax NVR family:

Why Low-Voltage DC Power Matters for Security Installers

This is the feature that makes the NVR HDC genuinely useful for professional installations. If you work in security, you will immediately understand why running on 8-16V DC is a big deal.

No Mains Wiring Required

Most alarm panels and their associated PSUs run on 12V DC. With the NVR HDC, the recorder can sit on the same low-voltage supply as the rest of the security system. There is no need for a separate mains socket in the comms cabinet and no need to bring in an electrician just to wire a 240V feed. For installers working in older buildings, listed properties, or sites with limited electrical infrastructure, this simplifies the job significantly.

Backup Power Integration

Because the NVR HDC runs on DC, it integrates naturally with battery backup systems. When the mains drops out, your 12V UPS or alarm panel battery keeps the recorder running and recording. This is critical for sites like construction yards, remote warehouses, and listed buildings where power reliability is a concern. The configurable jumper on the PSU board lets you set the turn-on threshold to either 8.1V or 12.1V, depending on whether you want broad voltage tolerance or protection against battery undervoltage.

PSTI UK Compliance

The NVR HDC is certified under the UK Product Security and Telecommunications Infrastructure (PSTI) Act Schedule 1. Since April 2024, all connectable products sold in the UK must meet minimum security standards: no default passwords, a published vulnerability disclosure policy, and a defined support period. Unlike many budget NVRs still sold online, the Ajax NVR HDC meets these requirements out of the box.

HDMI Output and the Built-In Video Management System

The other half of the NVR HDC story is the HDMI output. This turns the recorder from a headless box into a complete local monitoring station.

1080p Local Monitoring Without a PC

Plug the NVR HDC into any TV or monitor via HDMI, connect a USB mouse and keyboard, and you have a fully functional video management system running directly on the device. There is no laptop required, no VMS software to install, and no cloud dependency. This works even with no internet connection at all, which is ideal for sites that are offline or have unreliable connectivity.

Multi-View Layouts

The built-in VMS supports a wide range of camera view layouts. You can display a single camera full-screen, or use preset grids of 4, 9, or 16 cameras. There are also 5+1 and 7+1 layouts for focusing on one camera while keeping others visible. For larger setups, custom layouts up to a 10×10 grid are available. An automatic slideshow function rotates between different views, which is useful for guard stations or reception desks monitoring multiple zones.

Archive Playback and Timeline Navigation

The VMS includes timeline scrubbing, calendar-based event filtering, and playback speed control from 0.5x to 8x. Ajax’s proprietary JetSparrow technology handles video delivery and makes archive navigation fast and responsive, even for large recordings. All video streams are protected with TLS encryption, and exported video files carry a digital signature that the Ajax Media Player can verify, ensuring footage integrity for evidential purposes.

Technical Specifications

Here are the full specs for both models side by side:

Camera Compatibility – Ajax and Third-Party

One of the strongest selling points of the Ajax NVR range is that it does not lock you into a single camera ecosystem.

Ajax Cameras

The NVR HDC works natively with the full range of Ajax IP cameras, including the TurretCam, BulletCam, DomeCam Mini, and the newer HL (Hybrid Light) variants with colour night vision. Using Ajax’s JetSparrow protocol, you get the smoothest possible experience with features like AI object detection (people, vehicles, pets), customisable motion detection zones, event-triggered recording synchronised with Ajax alarm detectors, and instant event access from push notifications.

Third-Party Cameras via ONVIF and RTSP

If you already have cameras on site from Hikvision, Dahua, Axis, Uniview, or any other brand that supports ONVIF Profile S/T or RTSP, the NVR HDC will connect to them. Ajax claims the setup takes less than a minute per camera. This is a practical advantage for installers adding an Ajax NVR to an existing installation without replacing the cameras. Standard NVR-based motion detection is supported for third-party devices. If you are working with Hikvision specifically, we have a guide on connecting Hikvision cameras to Ajax in just five taps.

Ajax NVR HDC vs Hikvision NVR – An Honest Comparison

We install and supply both Ajax and Hikvision equipment, so we can give a balanced view here. The most common comparison for the NVR HDC is the Hikvision DS-7608NI-K2/8P, an 8-channel NVR with built-in PoE. Here is how they compare:

Where Hikvision wins: built-in PoE ports (no separate switch needed), 4K HDMI output, two HDD bays for more storage, a larger camera range, and a lower price. If your primary concern is getting the most hardware for the money, Hikvision remains very competitive.

Where Ajax wins: NDAA compliance (Hikvision is banned under US Section 889), full alarm ecosystem integration through one app, low-voltage DC power for flexible installations, EU data sovereignty and GDPR-compliant cloud storage, JetSparrow encrypted video delivery, and PSTI UK certification. If you are working on government sites, financial institutions, schools, or any project that requires compliance, the Ajax NVR HDC is the safer choice.

Our take as installers who work with both: if you need built-in PoE and maximum storage on a tight budget, Hikvision still delivers. But if compliance, alarm integration, or low-voltage power are priorities, the NVR HDC is the right tool for the job.

Real-World Use Cases for the Ajax NVR HDC

Here are some practical scenarios where we see the NVR HDC fitting perfectly:

Listed Buildings and Heritage Sites

English Heritage and planning regulations often restrict electrical work in protected structures. Running new mains circuits for an NVR may not be feasible or permitted. The NVR HDC runs from the same low-voltage supply that already powers the alarm panel, avoiding the need for additional mains wiring entirely. HDMI output gives building managers a local monitoring screen without any cloud dependency.

Construction Sites and Temporary Installations

DC power from site batteries, generators, or solar-powered camera systems makes the NVR HDC a natural fit for temporary sites. The compact form factor and SmartBracket mounting allow easy relocation as the site progresses. It works fully offline for local recording, which suits sites without internet.

Retail and Small Commercial

Reception desk or back-office monitoring via HDMI, with the full Ajax alarm system running through the same app. MotionCam alerts, door contact triggers, and camera feeds all in one place. PSTI certification satisfies insurance requirements without any extra paperwork.

Residential with Existing Ajax Alarms

Homeowners who already have an Ajax Hub and detectors can add the NVR HDC for local recording. Connect HDMI to the living room TV for quick camera checks. The low-voltage input means the NVR can sit in the same cupboard as the Hub, powered from the same PSU, with no additional mains sockets needed.

NDAA Compliance and Data Security

This matters more than most people realise. The Ajax NVR HDC is fully NDAA compliant, meaning every component is sourced from manufacturers approved and trusted by the US government. There are no Chinese-manufactured chipsets or firmware in the device. For UK buyers, this is relevant for government contracts, critical national infrastructure, financial institutions, healthcare facilities, and any site following US or NATO procurement standards.

On the data side, all Ajax cloud services store data within EU data centres, fully GDPR-compliant. Video streams are encrypted with TLS, and the NVR authenticates with Ajax Cloud using mutual TLS (mTLS), which means both ends verify each other’s identity. Exported video files carry a digital signature that the Ajax Media Player verifies automatically, rejecting any file that has been tampered with. This is important for evidential footage.

If you are interested in Ajax’s broader compliance story, including their Grade 3 certified alarm systems, we have covered that in detail.

Order the Ajax NVR HDC from ERTECH

Both the NVR HDC (8-ch) and NVR HDC (16-ch) are now available to order from ERTECH. We supply trade customers and end users across the UK, with competitive pricing and fast dispatch. If you need any help choosing the right model or planning your installation, get in touch – we have been installing and distributing Ajax systems since day one.

• Browse Ajax products at ERTECH
• View all NVRs at ERTECH
• Ajax NVR H series – official product page
• Visit ertech.co.uk

Frequently Asked Questions

What is the Ajax NVR HDC?

The Ajax NVR HDC is a compact network video recorder that combines HDMI output for local monitoring with low-voltage DC power input (8-16V). It is available in 8-channel and 16-channel models, records up to 8MP/4K resolution at 25/30 FPS, and supports both Ajax cameras and third-party ONVIF/RTSP cameras including Hikvision, Dahua, and Axis. It is NDAA compliant and PSTI UK Schedule 1 certified.

Can the Ajax NVR HDC work with Hikvision cameras?

Yes. The NVR HDC supports ONVIF Profile S/T and RTSP protocols, so it connects to Hikvision, Dahua, Axis, Uniview, and most other IP cameras. Setup takes less than a minute per camera. NVR-based motion detection is supported for third-party cameras, though AI object detection features require Ajax native cameras.

Does the Ajax NVR HDC have PoE ports?

No. The NVR HDC does not include built-in PoE ports. Cameras need to be powered separately via a PoE switch or individual power supplies. If you need built-in PoE, look at the Ajax NVR H2D series, which offers 8 or 16 PoE port options.

Is the Ajax NVR HDC NDAA compliant?

Yes. Every component in the NVR HDC is sourced from manufacturers trusted and approved by the US government. This makes it suitable for government buildings, critical infrastructure, financial institutions, and any site that follows US or NATO procurement guidelines. Hikvision and Dahua NVRs are banned under NDAA Section 889.

What is the difference between Ajax NVR HDC and NVR HAC?

The NVR HDC runs on low-voltage DC power (8-16V), while the NVR HAC runs on AC mains power (110-240V). Both have 1080p HDMI output and the same recording capabilities. Choose the HDC when you need battery backup integration, want to avoid mains wiring, or need to power the NVR from a low-voltage security system PSU.

How much storage does the Ajax NVR HDC support?

The NVR HDC has one SATA bay supporting a single 3.5-inch hard drive up to 16TB. At 4K resolution with H.265 compression, a 16TB drive typically provides several weeks of continuous recording on 8 channels, depending on scene complexity and frame rate settings.

Can I use the Ajax NVR HDC without internet?

Yes. The NVR HDC works fully offline for local recording and HDMI monitoring. The built-in VMS runs directly on the device, so you can view live feeds, search archives, and play back footage using a connected monitor, USB mouse, and keyboard with no internet connection at all. Internet is only needed for remote access via the Ajax apps.