What to Do When the Power Goes Out: A Step-by-Step Checklist

The lights go out. The hum of your refrigerator stops. Your router blinks off. You have a narrow window to make smart decisions that determine whether the next few hours are an inconvenience or a genuine problem.

Here is what to do, in order, whether you have backup power or not.

The First 60 Seconds

Check if it is just your house. Look out the window. Are your neighbors’ lights on? If so, the issue might be a tripped breaker, a blown fuse, or a problem with your service line — not a grid outage. Check your electrical panel before calling the utility company.

If it is a wider outage, report it. Most utility companies have outage reporting through their website, app, or an automated phone line. Reporting helps them understand the scope and prioritize repairs. Check their outage map if available — it often gives estimated restoration times.

Check your phone’s battery level. Your phone is now your primary communication tool, flashlight, and information source. If it is below 50%, put it in low power mode immediately. You will need it to last.

If You Have Backup Power

A UPS or portable power station changes the equation entirely. Instead of scrambling, you are managing a resource. Here is how to manage it well.

Prioritize Ruthlessly

You probably cannot run everything. Decide what matters most and power only those devices. Here is a typical priority list for a home outage:

1. Internet (router and modem): Keeps you connected to outage updates, work, and communication. A router and modem together draw about 15 to 30W — extremely efficient for the value they provide.
2. Phone and device charging: Keep your phone topped up. If you have a tablet, charge it too. Low draw, high utility.
3. Medical devices: CPAP machines, nebulizers, oxygen concentrators — if anyone in your household depends on a powered medical device, it goes near the top.
4. Refrigerator: This is a judgment call. If the outage will last less than 4 hours, your fridge will stay cold enough on its own (see below). If it will last longer and you have the capacity, powering the fridge saves hundreds of dollars of food.
5. Lighting: A single LED lamp or string of LED lights draws very little power and makes the house livable.
6. Work equipment: If you are working from home and have a deadline, your laptop and monitor come next.

Do Not Run Everything at Once

The most common mistake with backup power is plugging in every device you own and watching the battery drain in two hours. A 1,000Wh power station running a fridge, a laptop, LED lights, and a phone charger simultaneously will last about 6 to 8 hours. Running just the router and phone charger, it will last days.

Be strategic. Run the fridge for an hour, then unplug it and let it coast. Charge your phone to 80%, then unplug it. Rotate devices rather than running them all continuously.

Monitor Your Battery Level

If your power station has a display or app, check it periodically. Do the math: if you are at 60% and using 100W, you have roughly (capacity × 0.6) / 100 hours left. Knowing this number prevents unpleasant surprises.

Conserve for the Long Haul

If you do not know when power will be restored, assume it will take longer than the estimate. Utility restoration times are optimistic — the first estimate often reflects when crews will arrive, not when your power will actually be back on.

If You Do Not Have Backup Power

No UPS, no power station, no generator. Here is how to minimize the damage.

Protect Your Food

Your refrigerator keeps food safe for about 4 hours with the door closed. Your freezer stays cold for 24 to 48 hours depending on how full it is (fuller freezers hold temperature longer). The single most important thing you can do is keep the doors closed. Every time you open the fridge to check on things, you let cold air escape and warm air in.

If the outage stretches past 4 hours, move critical items to a cooler with ice if you have one. Dairy, raw meat, and leftovers are the highest risk for spoilage.

Unplug Sensitive Electronics

When power is restored, the initial surge can damage sensitive electronics. Unplug your computer, monitor, TV, and any other expensive equipment. Leave one light or a basic lamp plugged in so you know when power comes back. Plug everything else back in after the power has been stable for a few minutes.

A surge protector helps with this, but only if it is a real surge protector — not just a power strip with a switch.

Conserve Phone Battery

Turn off Wi-Fi and Bluetooth (they drain battery searching for dead connections). Reduce brightness. If you have a power bank, now is the time.

Light and Safety

Gather flashlights, candles, or battery-powered lanterns in one location. If using candles, keep them away from curtains and anything flammable, and never leave them unattended. A headlamp is surprisingly useful — it frees up both hands.

If it is winter and your heating is electric, conserve body heat. Close off rooms you are not using, hang blankets over windows for insulation, and gather everyone in one room. If you have a gas fireplace or wood stove, use it.

Preparing Before It Happens

The cheapest outage to deal with is the one you prepared for. Here is a low-effort preparation list:

Keep flashlights accessible. Not buried in a closet — on the kitchen counter or nightstand. A headlamp per family member is even better.

Keep a power bank and charging cable in a consistent spot. At 2 AM in the dark, you do not want to be searching.

Stock non-perishable food that does not require cooking. Granola bars, peanut butter, crackers, canned goods with a manual can opener.

Know your electrical panel. Label your breakers so you can quickly identify and isolate circuits.

Size a backup power system for your actual needs. This is the big one. A UPS or portable power station that covers your most critical devices for your likely outage duration transforms a power outage from a crisis into a mild inconvenience.

PowerLasts — a free backup power calculator — helps you figure out exactly what size backup you need based on your specific devices and runtime requirements. Add your router, phone charger, fridge, CPAP, or whatever else you cannot live without, and the calculator tells you what capacity to buy. Five minutes of planning now saves hours of stress later.

After Power Is Restored

Wait a few minutes before plugging everything back in. Power can flicker on and off during restoration. Give it 5 to 10 minutes of stable power before reconnecting sensitive electronics.

Check your fridge and freezer temperatures. If the fridge stayed above 40 degrees F (4 degrees C) for more than 2 hours, perishable food may not be safe. When in doubt, throw it out.

Recharge your backup power. If you used a UPS or power station, plug it in and let it fully recharge immediately. The next outage might be tomorrow.

Note what worked and what did not. Did your backup power last long enough? Did you have the right devices prioritized? Use that experience to adjust your setup for next time. An outage is expensive tuition — make sure you learn something from it.