When the Power Goes Out: Keeping Your Security Cameras Recording Through a Storm
A storm knocks out power to your building for six hours. By the time the lights come back on, so does your security system — but the six hours in between never got recorded. If something happened during that window, there's no footage to review, no clip to hand to an insurance adjuster, and no way to prove what did or didn't happen on your property.
Fall storm season makes this a seasonal problem as much as a technical one. Here's where the gaps actually are, and how to close them before the next outage, not after.
Where a Power Outage Actually Breaks Your System
"The power went out" sounds like one problem, but it usually breaks video surveillance in three separate places at once:
- The cameras go dark. Most IP cameras draw power over the same Ethernet cable that carries their video, straight from a PoE switch or PoE-enabled NVR. Cut power to that switch and every camera on it stops recording immediately, no matter how good the camera is.
- The NVR stops writing to disk. A local recorder with no battery behind it loses whatever was in its buffer the instant the outage hits, and records nothing until power returns.
- Remote access disappears. Even if your building's power is fine, a modem or router that loses power takes your internet connection with it — so you can't check in from your phone even if the cameras themselves are still running.
A system that only records locally has no answer to any of these. Once the outage hits, that window of footage is simply gone.
Building a Setup That Survives the Gap
The fix isn't choosing between local recording and cloud recording — it's using both, so each one covers the other's weak point.
A local PoE NVR like the Silarius SIL-NVR16CHPOE4 paired with an uninterruptible power supply (UPS) buys you real time during a short outage — enough to ride out a flicker or a brief utility blip without losing a second of footage. For the outages that run longer than any UPS can bridge, that's where Silarius Cloud earns its place in the setup. It connects to your existing cameras and NVR over standard ONVIF or RTSP — whatever brand they already are — and continuously syncs footage off-site to AWS-backed storage the moment a connection is available, so a damaged or stolen recorder on-site doesn't mean lost evidence.
Why the Cloud Layer Matters More Than the Backup Battery
A UPS only solves the first few hours. The cloud layer solves the rest of the problem:
- Footage survives hardware loss. If a power surge, lightning strike, or flood damages the on-site NVR itself, whatever had already synced to the cloud is unaffected — it's backed by a 99.99% uptime SLA, not the condition of a box sitting in a closet.
- It's encrypted the whole way. Footage is protected with AES-256 encryption both at rest and in transit, so an outage doesn't become a second problem on top of the first.
- You choose how much of a buffer you need. Retention runs from 7 up to 90 days, so a claim or investigation that surfaces two or three weeks after the fact still has footage to pull, instead of a gap where the local system already overwrote it.
- One dashboard, every site. If a regional storm takes out power across several locations at once, you can check which sites are back online and reviewing footage again without driving to each one.
A Short Checklist Before the Next Storm
None of this requires new cameras or a system swap. Before the next outage rolls through, it's worth confirming:
- Your NVR and PoE switch are on a UPS rated for the load, not just the modem and router.
- Your recorder has enough local storage headroom to keep recording through the hours it takes utility crews to restore power — our NVR buying guide walks through sizing that correctly.
- Cameras and recorders are actually syncing to the cloud, not just plugged in and forgotten — a quick login check now beats finding out during a claim.
- Retention is set to match your needs, not left on a default that's shorter than how long it actually takes an incident to surface.
A storm that knocks out the power for an afternoon shouldn't also knock out your evidence for that afternoon. See how Silarius Cloud adds that layer on top of the system you already have, with a 30-day free trial and no credit card required.
