Before a hurricane, the goal is not to keep every screen in the house alive — it is to keep the processor, the network, and the alarm's cellular path alive through any interruption in utility power, and to shut everything else down in a controlled order rather than let it crash. That means separating loads into three tiers — generator, UPS-bridged, and shed — and documenting the shed order before the storm, not during it. Cave Group designs that load-tier framework into its estate technology packages so a property's electrical and alarm contractor can confirm the specific transfer-switch timing and circuit assignments for the installed equipment, since those details vary by generator and panel. Ask your contractor directly how long your own automatic transfer switch takes to pick up generator power, because that number drives how much battery runtime the rack actually needs.
Why does the rack need a UPS if a generator is already installed?
A generator does not power equipment the instant utility power drops — there is always some interval between the outage and the generator carrying the house, and during that interval a UPS is what keeps sensitive electronics from losing power outright. Crestron's documentation for its rack UPS hardware describes this bridging role directly: the unit "constantly monitors the incoming power line and instantly transfers power to battery backup in the event of such a power loss, ensuring the connected components continue to operate unhampered," and it is also built to "ensure a smooth changeover from primary power to a backup generator." CEN-UPS1250 That specific model is now listed as discontinued by Crestron, so it is an earlier-generation product and should not be specified into a new installation — a current rack UPS, sized to today's processor and switch load, is the right starting point, chosen together with the installing contractor. Ask your contractor what your generator's actual start-and-transfer time is and whether the UPS battery runtime comfortably covers it.
The same bridging logic applies to the network rack. Ubiquiti's current UniFi rack UPS line is built to support graceful shutdown of the network video recorder and storage appliance rather than just holding voltage: the UPS 2U, for example, "Supports Graceful Shutdown for UNVR and UNAS, NUT compatibility for 3-party devices," with a stated runtime of roughly 8 minutes at half load. Ubiquiti Store United States A graceful shutdown signal — rather than an abrupt power cut — matters because it lets the NVR close its database cleanly instead of risking a corrupted recording index, and it lets a Crestron processor save state before power actually disappears. An integrator should confirm during design whether the installed UniFi gateway, switch, and NVR are all on the same UPS branch so the shutdown signal reaches all of them together, and whether the battery runtime leaves margin above the generator's expected start time.
Which loads belong on the generator, the UPS, or the shed list?
A workable framework splits every circuit into three tiers before the design is finalized:
- Generator tier — loads that only need generator power once it is available: refrigeration, well or sump pumps, HVAC, and the generator's own controls. These do not need battery bridging.
- UPS-bridged tier — the rack: Crestron processor, UniFi gateway and switches powering critical access points, the NVR/NAS, and the alarm panel's communicator. These need battery backup through any interruption, which is what a rack UPS with Crestron and UniFi graceful-shutdown support is designed to cover if the outage runs longer than the battery.
- Shed tier — everything non-critical during an extended outage: distributed audio zones, decorative and landscape lighting circuits, secondary displays, and outdoor access points on docks or pool decks that serve guest convenience rather than security or monitoring. These should power down automatically or manually once the generator is carrying the house, to extend fuel runtime and reduce the load the system needs to carry through a multi-day event.
The alarm communicator and the networking gear it depends on for cellular or broadband failover belong firmly in the UPS-bridged tier, not the shed tier — a storm is exactly when monitored alarm coverage matters most, and that circuit should never sit on the same switch as anything an estate manager might reasonably power down to conserve fuel.
What should get powered down before the storm arrives?
Outdoor access points and dock-side networking and AV equipment are the clearest pre-storm shutdown candidates: these are the devices most exposed to wind-driven debris and water intrusion, and they are the least likely to be needed while the property is unoccupied or sheltering. A pre-storm walk-through should confirm which outdoor APs, dock cameras, and marina-facing network gear can be powered off and, where practical, physically protected, versus which outdoor cameras need to stay live because they cover entry points the alarm system is actively monitoring. This is a property-specific decision that should be worked out with the installing contractor well ahead of storm season rather than improvised the night before landfall — Cave Group builds that sequencing into the handoff documentation as part of its residential design process.
What should the integrator leave with the estate manager?
A property team should not have to call an integrator to make shutdown decisions in the middle of a storm. The handoff package should include a circuit map that identifies which breakers and outlets belong to each of the three tiers, a written shed order listing exactly what gets powered down and in what sequence as an outage extends, and a clearly marked exception list showing which circuits must never be shed — the alarm communicator, the UniFi gateway carrying its failover path, and the rack UPS feeding both. Ask your integrator what remote visibility their support program gives you into the rack's state during a storm — for example, whether it reports equipment going offline — and have that confirmed in writing as part of your support agreement rather than assumed. Cave Group's support and monitoring page outlines how its Cave Watch program covers installed Crestron and UniFi equipment. Related reading: Crestron 3-Series to 4-Series Migration covers what to confirm about processor compatibility and remote management if an estate's control hardware is also due for a refresh.
Frequently asked questions
Why does a generator-backed estate still need a rack UPS?
Because there is always some interval between a utility outage and the generator carrying the house, and a rack UPS is designed to hold the processor and network gear on battery through that interval rather than let them lose power outright. Ask your electrical contractor what your specific transfer time is so the UPS runtime can be matched to it.
Should alarm monitoring equipment be on the shed list during an extended outage?
No. The alarm panel's communicator and the networking gear carrying its cellular or broadband path should sit in the UPS-bridged tier with documented exceptions marking them as never-shed circuits, since storm conditions are when monitored alarm coverage matters most.
What happens to network video recording during a power interruption?
A graceful shutdown signal lets the NVR and its storage appliance close their database properly instead of risking corruption from an abrupt cut. Current UniFi rack UPS hardware is built to send that signal to the UNVR and UNAS specifically, which is why the rack's UPS and networking gear should share the same battery branch.
Is Crestron's CEN-UPS1250 still a good choice for a new rack?
No — Crestron lists the CEN-UPS1250 as discontinued, so it is an earlier-generation product that should not be specified into a new installation. A current-generation rack UPS sized to the installed processor and switch load, selected with the installing contractor, is the right starting point for new designs.
What should be powered down before a hurricane makes landfall?
Outdoor access points, dock cameras, and marina-facing network gear are the clearest pre-storm shutdown candidates because they face the heaviest wind and water exposure and are least needed while the property is unoccupied. Which outdoor cameras must stay live to cover monitored entry points is a property-specific call that should be made with the installing contractor ahead of storm season, not during it.