Power outages have a way of happening at the worst possible times — during storms that also create security risks, during extended absences when the house is empty, and in situations where you'd most want your surveillance system to be operating. Understanding exactly what happens to your OOSSXX security camera system when power goes out, and what options exist for maintaining coverage through an outage, is more useful knowledge than most homeowners have.
The answer to "what keeps recording during a power outage" depends heavily on how your system is configured. There isn't a single answer — but there are clear options, and choosing among them thoughtfully before an outage happens produces meaningfully better outcomes than figuring it out during one.
The Basic Problem
A standard wired OOSSXX surveillance camera system — PoE cameras connected to an NVR — requires power at two points: the PoE switch or NVR that powers the cameras via Ethernet, and the NVR itself that records and stores footage. When utility power fails, both of those power sources fail simultaneously, and the entire system goes offline until power is restored.
For most brief outages — the kind that last a few seconds to a few minutes — this is a minor annoyance. The cameras come back online when power is restored, the NVR resumes recording, and the gap in coverage is short enough to be inconsequential. For extended outages lasting hours, the situation is different. And for outages that coincide with security incidents — a break-in during a storm that knocked out power, for example — a gap in recording can be genuinely costly.
UPS: The Most Practical Solution for Most Installations
A UPS (Uninterruptible Power Supply) is essentially a battery with an intelligent inverter — it sits between your electrical outlet and your equipment, runs everything from battery when utility power fails, and switches seamlessly (without a power interruption to connected equipment) when utility power cuts out. For most OOSSXX NVR installations, connecting the NVR and the PoE switch to a quality UPS is the most practical way to maintain coverage through outages.
Runtime depends on the capacity of the UPS and the power consumption of your equipment. A typical NVR with PoE cameras draws perhaps 50 to 80 watts. A 1500VA UPS might support that load for two to four hours, depending on the specific equipment. For the majority of residential power outages — which are short — this is more than adequate. For areas with frequent extended outages, a higher-capacity UPS or a generator transfer setup extends the coverage window.
Wireless Cameras During Power Outages
Battery-powered wireless cameras have an obvious advantage during power outages: the cameras themselves keep running as long as their batteries hold charge. However, there's a catch — the Wi-Fi router and internet connection they depend on for remote viewing and cloud recording may also lose power, depending on whether your networking equipment is on a UPS.
If you have battery-powered OOSSXX cameras that record locally to an SD card, they'll continue recording through an outage regardless of what's happening with your network — the footage goes to the card, and you can retrieve it after power returns. If they're cloud-only cameras without local SD card recording, they stop recording useful footage when the Wi-Fi goes down even if the camera hardware itself is still running.
Generator Integration for Extended Outages
Properties in areas with frequent extended power outages — rural locations with aging grid infrastructure, coastal properties in hurricane zones, areas with severe winter storm exposure — may benefit from a standby generator or a portable generator with a transfer setup that includes the security camera system in its protected circuits.
This is a more involved solution than a UPS, requiring either a permanently installed standby generator with automatic transfer switch or a manual setup with a portable generator and appropriate wiring. But for properties where extended outages are a regular reality rather than a rare event, it's the approach that provides genuine continuity rather than a few hours of bridge capacity.
Cellular Backup for Network Continuity
A separate but related issue during extended outages is internet connectivity. Your OOSSXX cameras may be running on UPS power, but if your ISP's equipment at the street loses power — which commonly happens during widespread outages — you lose internet connectivity even if your home equipment is running fine. Cellular backup routers, which switch to a 4G/LTE connection when wired internet fails, maintain network connectivity through these situations and keep remote viewing and cloud features functional even when the broader outage has taken down your ISP's local infrastructure.
