Security cameras + NVR / PoE switch backup during an outage

• No invented camera, NVR, or PoE watts. IR night mode, PTZ, HDD spin-up, and PoE budget class change draw. QuietWatt will not invent “~N W per camera.” Read the NVR / PoE switch / brick label (or meter the stack) and use that number in the Wh formula.
• Always-on idle ≠ nameplate / PoE budget. Switch PoE budget (e.g. “120 W PoE”) is a ceiling, not continuous house draw. Size from measured or label idle of the whole stack — surge honesty: peak vs continuous watts.
• Overnight is Wh; multi-day is recharge. Hours ≈ (station Wh × ~0.85 usable) ÷ average stack W. The 0.85 is a planning factor — confirm usable % and continuous W on the station listing. Sizing method: what size power station.
• A small UPS often beats a camping station for flicker-only. If you only need minutes so the NVR doesn’t unclean-shutdown, a line-interactive desk UPS is usually cheaper and quieter than a mid camping pack. Hours of recording need station Wh. Desk axes: office UPS vs power station · UPS vs portable · EPS vs UPS mode.
• Apartment fan noise. Always-on low loads can still wake inverter fans on some stations; shared walls care. Noise axes: fan noise apartment · best apartment.

Framing is planning honesty from manufacturer product-page patterns and QuietWatt sibling citations (checked Oct 2026) — not QuietWatt lab tests, CCTV performance guarantees, or electrical / security-system advice. Estimates labelled. Check listing / label.

1. Meter or read labels for the stack. NVR / DVR brick + PoE switch brick + any separate camera injectors. QuietWatt will not invent those watts.
2. PoE switch adder. Add measured switch idle (or label input watts), not the marketing PoE budget. Cameras already powered through that switch are in the switch’s input watts — do not double-count camera stickers plus switch PoE budget.
3. Modem / ONT / router if cloud alerts / remote view matter during the outage — often a separate always-on brick. Internet-only math: modem + router outage · Wi‑Fi / modem backup · Starlink contrast: Starlink power station.
4. Hours ≈ (nameplate Wh × ~0.85) ÷ average stack W. Overnight = hours of always-on idle. Multi-day = nightly Wh out − daily solar / shore Wh in. Expand: expandable multi-day.
5. HDD / boot spikes. Size continuous inverter headroom for the peak you measure at boot / IR / PTZ — then budget Wh from average idle. Peak trap: peak vs continuous.

• UPS wins: flicker / brownout cover, clean shutdown signalling (USB / NUT), tiny footprint next to the rack, budget. Transfer claims: check listing / label — EPS vs UPS mode.
• Station wins: multi-hour / overnight recording, move the pack to modem / fridge / desk later, solar top-up. Desk vs portable axes: office UPS vs station · UPS vs portable.
• Both (common): small UPS on the NVR for signalling / flicker; station Wh for hours and for the PoE switch + modem stack.
• Battery Wi‑Fi cams already store some runtime onboard — still budget base stations / hubs / NVR if those bricks are on wall power. Product framing: security camera backup.
• Example mid stations QuietWatt tracks (confirm live Wh / continuous W / UPS-EPS claims — not QuietWatt measurements): EcoFlow DELTA 3 Plus, BLUETTI Elite 100 V2, Anker SOLIX C1000, Jackery Explorer 1000 v2, EcoFlow RIVER 3 Plus (compact bridge — confirm Wh before overnight multi-cam claims).

• Meter / label the NVR + PoE stack first — then run overnight Wh math. Do not buy from a viral “per-camera watt” graphic alone.
• Prefer a small UPS when the only job is flicker + clean shutdown.
• Prefer station Wh when overnight / multi-day recording matters — and plan recharge.
• Check apartment fan behaviour at light always-on loads before you park a mid station in a hallway closet.