An alarm staying powered does not prove that cameras are recording or that a monitoring center can receive a signal. Check backup power, communication and recording separately for your exact equipment and plan. This guide uses manufacturer documentation; we have not performed outage tests.
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Base station / control panel
Check the exact panel, charged battery and functions retained on backup. SimpliSafe documents up to 24 hours for its current Base Station; that is not a guaranteed runtime for every system or accessory.
Door and window sensors
Battery-powered sensors do not rely on household power for their own supply. They still need working batteries and a functioning connection to the alarm panel. Check each model rather than assuming a three-to-five-year battery life.
Siren / alarm output
For example, Ring documents that its alarm siren remains available when the Base Station is offline. Confirm power, battery condition and the retained functions of your own panel and any separate siren.
Cellular alarm communication
An enabled, supported cellular alarm connection can provide a path when home broadband is down. It still depends on panel power, the required service and a working carrier connection; it does not supply internet to every camera.
Smart locks
Battery-powered locks may retain local keypad or thumbturn operation while remote features stop working. Check the model's battery status, local-entry options and backup-entry instructions.
Battery-powered cameras
A charged camera battery does not establish outage recording. Arlo documents local USB recording during an internet outage only when the compatible camera and hub remain powered and local storage is configured. Check the complete recording path.
Wired/PoE cameras (without UPS)
A wired camera needs backup power at its actual power source. If it records through a hub, recorder or network switch, those required devices also need power. Backing up only the camera or only the router may leave a gap.
Live camera streaming
A camera that uses home Wi-Fi needs that network for its normal live-view path. Remote access also needs a working internet connection. Keeping the router powered does not fix an upstream service outage; cellular-capable cameras have different requirements.
Broadband alarm communication
A broadband-only alarm path can fail when its router, modem or internet service fails. Check which alternate communication path your installed system actually supports and whether it is enabled.
Smart home automations
Hub-dependent automations (auto-lock on arm, smart light control) may not trigger if the hub loses power — even if individual devices have battery backup.
These are two separate and complementary protections that address different failure modes:
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| Backup type | What it protects against | How it works | Duration |
|---|---|---|---|
| Battery backup | Power outage (no electricity) | Base station runs on internal rechargeable battery | Model- and battery-dependent; use the specified limit |
| Cellular backup | Internet outage (broadband down) | Alarm signals route over 4G LTE cellular network | Requires equipment power, enabled service and a working carrier connection |
| Both combined | Power + internet outage simultaneously | Backup power supports the panel; cellular may carry alarm signals | Limited by battery charge and the available communication path |
Treat alarm power, alarm communication and camera operation as separate checks. Ring, for example, distinguishes Alarm Cellular Backup from Alarm Pro backup internet. Alarm Pro turns off Wi-Fi and most features on its internal battery; Ring documents additional backup-power requirements for continuing its internet service. Do not assume an alarm backup also powers cameras or a home network.
Vivint
Check the installed panel and camerasVivint lists 24-hour backup and built-in cellular for the Smart Hub Pro 2 (VS-SHP200-001). That panel specification does not power the hardwired Outdoor Camera Pro. Confirm the exact installed models, camera power and recording requirements, enabled monitoring service and cellular connection before relying on outage backup.
Ask before buying: Which panel and camera models are included, what works without power or internet, and what equipment, monitoring and backup options cost in the written quote?
Leave your email and phone number if you want Taylor to arrange a call about Vivint. Submit the request form only if you want to be contacted. No obligation to buy; the written provider quote determines pricing and terms.
SimpliSafe
Check battery and monitoring conditionsSimpliSafe documents up to 24 hours of Base Station battery backup. Cellular alarm communication requires professional monitoring and working cellular service. During a power outage, its support instructions say to use the Keypad to arm or disarm; remote app control is unavailable until power returns. Cameras have separate power and Wi-Fi requirements.
Plan distinction: SimpliSafe lists Standard at $22.99/month with built-in network backup, but no camera recordings. Self-Monitoring with Camera Recordings is $9.99/month and excludes professional monitoring. Prices checked September 16, 2026; confirm the current plan and price before subscribing.
Outage-claim update: September 16, 2026. These are documented conditions, not results from our own outage testing. Runtime, recording and monitoring must be checked for your installed models and service. SimpliSafe prices above reflect its linked support page on the check date; confirm current terms before subscribing.
Manufacturer sources: SimpliSafe outage behavior · SimpliSafe plan options · Vivint Smart Hub Pro 2 · Vivint Outdoor Camera Pro power · Arlo local recording · Ring Alarm offline behavior · Ring Alarm Pro backup · Schlage lock outage behavior
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