The Ubiquiti USW Mission Critical is a rare device that combines several features you’d normally need separate hardware for: a managed 1GbE PoE switch, an integrated UPS battery backup, and two remotely controllable AC power outlets—all in a single 1U rackmount chassis. The intended use case is keeping your cameras recording and your internet connection self-healing during power outages, and it does that well. In my setup, eight cameras draw only about 23% of the 240W PoE budget, leaving substantial headroom. The AC outlets can be power-cycled remotely or automatically if internet drops—handy for rebooting a flaky modem. The main drawbacks are the unit’s unusual depth, which can cause clearance issues in shallow racks, and the lack of automated graceful-shutdown support for connected devices when the battery runs low.

What It Does

Every PoE port on the switch is battery-backed, as are the two standard AC outlets on the rear of the unit. The SFP uplink port doesn’t deliver PoE—even under AC power, you can’t power devices from it—but it does continue to operate on battery, so your uplink stays active during an outage. The two AC outlets can be power-cycled remotely through the UniFi controller—either manually or automatically if the internet connection drops.

The intended use case is straightforward: plug your cameras into the PoE ports, your NVR or recording device into one battery-backed outlet, and your internet modem into the other. In the event of a power failure, your cameras keep running, your recordings keep writing, and your modem stays online. If the internet does go down—something that can happen during or after a power event—the switch can automatically power-cycle the modem outlet to restore connectivity without anyone needing to intervene.

UniFi controller showing port assignments, battery status, and power utilization for the USW Mission Critical

In my setup, eight cameras are connected across the PoE ports, drawing only about 23% of the switch’s 240W PoE budget (54W total). That leaves substantial headroom for adding more cameras or upgrading to higher-draw models in the future. The 1GbE ports are more than sufficient for individual camera feeds—even high-bitrate 4K streams don’t come close to saturating a gigabit link.

The internal battery has a 368Wh capacity, and the switch also supports an external battery for extended runtime. With a modest PoE load like mine and minimal outlet draw, runtime during an outage is quite generous.

The Outlets

UniFi controller showing outlet status, touchscreen settings, and management options for the USW Mission Critical

The two battery-backed outlets are managed through the UniFi controller just like any other device on the network. Each outlet shows its power draw and can be individually enabled, disabled, or power-cycled. The automatic internet-recovery feature ties into this: if the switch detects that connectivity has been lost, it can cycle the outlet powering your modem on a configurable schedule, which is a surprisingly common fix for consumer ISP equipment.

The unit also has a front-panel touchscreen that displays status information, with configurable brightness, rotation, and a night mode to dim the display during off-hours.

Drawbacks

I have two complaints, neither of which is a dealbreaker.

First, the device is physically long—noticeably deeper than most Ubiquiti rackmount equipment. In my wall-mounted rack, I had almost no clearance behind the unit, and I had to switch to right-angle power cords to make everything fit. I’m not entirely sure it would fit in a mini-rack at all. If you’re planning a new install, a full-depth or freestanding rack avoids this issue entirely.

Second, while the UniFi controller does display battery and power status in a clear, human-readable format—as shown in the screenshots above—the Mission Critical switch lacks the automated shutdown capability that Ubiquiti’s newer standalone UPS devices offer. It can’t signal your NVR to perform a graceful shutdown when the battery is nearly depleted, nor can you pair it with a Dream Machine for automated shutdown coordination. For a device with “mission critical” in the name, this is a notable omission. You can monitor the battery level yourself through the UI, but if you’re not watching during an extended outage, connected devices will lose power abruptly rather than shutting down cleanly. It’s worth noting that Ubiquiti has added automated shutdown support to their standalone UPS devices, so a future firmware update could bring the same capability to the Mission Critical switch.

Conclusion

Despite those two issues, the USW Mission Critical is an elegant solution to a whole group of common problems. Instead of juggling a separate switch, UPS, and smart power strip, you get a single managed device that keeps your cameras online, your recordings intact, and your internet connection self-healing—all through the same UniFi interface you’re already using for everything else.