Front and rear views of the 6708KR PoE recorder listed by QuarkView.
When planning backup power for a camera system, the useful question is not “How many cameras can this UPS support?” It is “Which powered devices are required to get a recorded frame onto the disk?”
Trace that path before shopping. A camera plugged into the recorder’s own PoE ports has a different power path from a camera supplied by a separate switch. In the second layout, keeping only the NVR alive leaves the cameras without power. Network equipment that carries the video must survive too. A router needed only for internet access may be unnecessary for isolated local recording, but that depends on the actual topology.
Budget the input you will really back up
Consider an explicitly hypothetical installation:
| Essential device | Assumed AC load |
|---|---|
| NVR with storage, excluding camera power | 25 W |
| Populated PoE switch, including its cameras | 70 W |
| Router required for the video path | 10 W |
| Total | 105 W |
The important detail is the second row. Its 70 W already includes camera power. Adding the individual camera watts again would count the same load twice. An NVR with built-in PoE can create the same mistake: total measured recorder input may already include the cameras.
If you choose an illustrative 25% planning allowance, the calculation becomes 105 × 1.25 = 131.25 W. That is a capacity planning figure, not a battery-runtime forecast. Replace these assumptions with documented demand and measurements from the installation, including night illumination, the installed drives and startup behavior.
Capacity and runtime answer different questions
Check both UPS limits: watts for real power and VA for apparent power. Do not infer watts or backup minutes from a VA label alone. Use the exact model’s official runtime curve or calculator for the intended load and battery configuration.
There is a practical reason to do this. CCTV Camera World publishes roughly 40 minutes at 100 W and 17 minutes at 200 W for one 1000 VA / 600 W UPS at maximum battery health. Those figures describe that particular product. They neither predict our hypothetical system nor apply to every 1000 VA unit. Battery condition and operating circumstances matter too.
Accept the recording, not just the lights
Agree a controlled outage test with the site owner and follow the UPS manufacturer’s procedure while preserving protective earth. Verify battery operation, all required devices and the absence of overload. After restoring power, replay every channel across the interruption and recovery timestamps. Check continuity, time, storage health and resumed recording; export a sample and open it in the intended player.
Test remote access separately if it is required. Backing up your router does not guarantee that the internet provider remains online. Record gaps and unresolved exceptions, and repeat the checks after expanding the system.
The complete camera UPS planning and recording-test guide includes the load worksheet, official source links and the related PoE installation planning steps.
Prepared with AI assistance; calculations and manufacturer references were checked before publication.
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