Do smart locks work during a power outage?

Most smart locks are battery-powered and continue to work during outages. However, remote features (app control, auto-lock schedules) require Wi-Fi. Always keep a physical key as backup.

Should I unplug my router during a power outage?

If you have a UPS or solar generator, keep your router running — internet service often stays active even during power outages via fiber or cable. A working router enables phone communication and information access.

Can hackers target smart home devices during emergencies?

Yes. Cyberattacks often increase during crises when people are distracted. Keep firmware updated, use strong passwords, and segment IoT devices on a separate network from your main computers and phones.

Home Cybersecurity for Preppers: Protecting Your Smart Home During Grid Events

In February 2026, CISA and the FBI issued an updated joint advisory warning that Volt Typhoon had embedded in more than 20 US utility networks for over 300 days. Modern homes are deeply connected to the grid and internet — and when either goes down, smart locks, thermostats, cameras, and medical devices can fail in unexpected ways.

Key Takeaways

Volt Typhoon embedded in 20+ US utility networks for 300+ days — grid disruption from cyberattacks is no longer theoretical.
Most smart home devices require both power and internet; some critical functions fail completely during outages.
A UPS or portable power station keeps your router and critical devices running through short outages.
Offline backups (physical keys, manual overrides) are an underrated preparedness measure.
CISA maintains free cybersecurity resources at cisa.gov.

What Is Volt Typhoon — and Why Should Homeowners Care?

Volt Typhoon is a Chinese state-sponsored cyberattack campaign targeting US critical infrastructure. Its goal is pre-positioning: embedding dormant access for potential future disruption. The risk for households is longer, less predictable grid outages — a reason to extend preparedness from 72 hours to a week or more.

CISA Resources for Households

CISA publishes free home cybersecurity guides at cisa.gov. Their "Secure Our World" campaign includes specific smart home device security guidance.

What Happens to Your Smart Home During a Grid Outage

Devices That Fail Immediately

Smart TVs, speakers, robot vacuums, hardwired lighting — all stop when power cuts. What catches people off guard: some smart switches have no physical override, and some thermostats require power for any operation.

Devices That Fail When Internet Goes Down

Cloud-dependent smart locks may refuse to operate. Security cameras using cloud storage stop functioning. Smart thermostats may revert to default mode or display errors.

Smart Locks: Know Your Failsafe Mode

Check your smart lock's failsafe behavior before an outage. Most quality locks fail locked and maintain battery for keypad entry. Some cheaper models behave unpredictably. Always keep a physical backup key accessible.

Medical Devices: A Special Category

Internet-connected medical devices may lose connectivity during outages. Consult your device manufacturer's documentation for offline procedures before an emergency — not during one.

The UPS Solution: Keeping Critical Devices Running

The Anker SOLIX C1000 (1,056Wh) offers LFP battery chemistry and sub-30ms UPS mode switchover. Your router and NAS experience zero interruption during an outage.

Anker SOLIX C1000

Pros

LFP battery: 3,000+ cycles and longer lifespan
Sub-30ms UPS mode: sensitive electronics never notice the transition
1,056Wh: enough to run a router (15W) for 70+ hours
Smart app control for remote monitoring

Cons

Higher price than a basic UPS — justified for home office, NAS, or medical devices
35 lbs: not designed for frequent transport

Sizing Your UPS for a Smart Home

Router/modem: ~15–25W
Smart home hub: ~10–15W
NAS drive: ~20–50W
Desktop computer: 100–300W

Add up your loads, choose a UPS with 20% headroom. A 1,000Wh unit running 100W total provides ~8–9 hours.

EMP Preparedness: Separating Fact from Fiction

Focus on realistic threats first: regional outages from cyberattack, weather, or equipment failure are far more likely than EMP events. Keeping a battery-powered emergency radio provides useful redundancy without elaborate Faraday cages.

The Midland ER310 receives NOAA Weather Radio broadcasts without internet or cellular. It supports SAME county-specific alerts and runs on AA batteries, hand-crank, or solar.

Practical Cybersecurity Steps for Smart Home Owners

Audit every internet-connected device: what happens if power fails? If internet fails? Is there a manual override?
Keep physical keys for smart locks and know manual thermostat mode
Use local storage (SD card or NAS) instead of cloud-only for cameras
Enable automatic firmware updates on all devices, especially your router
Put IoT devices on a separate WiFi network from computers and phones

The Offline Test

Once a year, unplug your router for 15 minutes and test each smart home device. Note what stops working, what degrades gracefully, and what fails unpredictably.

Smart Home Outage Checklist

When power goes out: Switch UPS to support router; check smart lock battery and physical key; activate emergency radio.

When internet goes down: Check devices for offline mode; access hub locally; verify cameras recording locally.

After restoration: Reconnect devices; check firmware updates; review camera logs; test smart lock and thermostat settings.

Frequently Asked Questions

Will my smart home devices work during a power outage?

Battery-powered devices (smart locks, smoke detectors) continue. Plugged-in devices without backup stop. Cloud-dependent devices may fail even with power.

What is Volt Typhoon?

A Chinese state-sponsored cyberattack campaign targeting US critical infrastructure. It doesn't target individual homes, but increases the probability and duration of grid disruptions.

What does a UPS do that a power strip doesn't?

A UPS contains a battery that provides immediate, seamless power when the grid fails. The Anker SOLIX C1000's UPS mode switches in under 30 milliseconds — fast enough that sensitive devices don't register the transition.