U.S. electricity customers averaged 11 hours without power in 2024, nearly twice the annual average of the decade before, according to the U.S. Energy Information Administration’s Electric Power Annual. Major events such as Hurricanes Beryl, Helene and Milton accounted for 80% of those hours, and outages not tied to major events routinely average about two hours a year, the EIA says. That spread, from a two-hour evening blackout to a multi-day storm outage, is exactly why choosing a power station for outages starts with how long you need to stay powered, not with the biggest battery you can afford. This guide walks through a five-step way to choose.
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Outage data comes from the EIA’s December 2025 analysis. Product specs come from each maker’s product page or manual, and runtimes are labeled estimates.
Step 1: Decide What Has to Stay On
Write down the devices that matter during an outage, and find their wattage on the label, the charger or the maker’s spec sheet. Most outage lists fall into three tiers:
| Tier | Typical devices | Typical running watts (estimate) |
|---|---|---|
| Stay connected | Router + modem or fiber ONT, phones, LED lamp, laptop | ~30–100W |
| Keep food and health safe | Refrigerator, CPAP, medication fridge, chest freezer | ~100–250W average, with startup surges |
| Stay comfortable | Furnace blower, window AC, sump pump, microwave, coffee maker | ~300–1,500W while running |
Don’t add up the “comfortable” tier as if everything runs at once. Instead, note the single largest appliance, because that sets your inverter size (Step 3).
Step 2: Turn Hours Into Watt-Hours
Capacity in watt-hours (Wh) decides how long you can stay powered. Multiply each device’s average watts by the hours you’ll use it, and add them. Then divide by about 0.85 to allow for inverter losses, which is a common rule of thumb.
| Outage scenario | Example loads | Energy needed (estimate) | Capacity class |
|---|---|---|---|
| Evening blackout, 2–4 hours | Router, phones, lights, laptop | ~150–300Wh | 250–500Wh |
| Overnight, 8–12 hours | Above + CPAP or a fan | ~400–800Wh | 700Wh–1kWh |
| One full day | Above + refrigerator | ~1.5–2.5kWh | 2kWh or more |
| Multi-day storm outage | Essentials + fridge + furnace blower | ~2–4kWh per day | 2–6kWh with solar or expansion |
A full-size refrigerator typically uses 1–2kWh a day, which is why it’s the dividing line between small and large stations. Our refrigerator watts guide shows how to estimate yours.
Step 3: Size the Inverter for Your Biggest Load
The inverter’s continuous rating (in watts) must cover the biggest thing you’ll run, plus anything running at the same time. Motors, like fridge and well-pump compressors, also need a short startup surge, often two to three times their running watts. A station’s surge rating covers that briefly. See our surge vs running watts explainer for motor loads.
- 600W class: electronics, lights, CPAP, fans.
- 800–1,800W class: adds a refrigerator, a small microwave, a coffee maker.
- 2,400–3,000W class: adds a window AC, a well pump or a space heater (for short periods).
Step 4: Plan How You’ll Recharge
For anything longer than one night, recharging matters as much as capacity. You have three options during an outage:
- Solar: the station’s solar input limit decides how much a day you can put back. A 220W input refills a small station; a 1,000W-plus input can meaningfully refill a 2kWh station on a sunny day.
- Car: slow, often 100–120W, but useful for small stations.
- Gas generator: a quick way to recharge a big station, run outdoors well away from the house. Our generator vs battery backup comparison covers how they work together.
Step 5: Check the Outage-Specific Features
| Feature | Why it matters in an outage |
|---|---|
| UPS / EPS switchover | Keeps a router, PC or CPAP running when the grid drops. Look for a published switchover time; 10–20 ms is typical for stations. |
| LiFePO4 battery | Longer cycle life and slow self-discharge make it easier to keep a station ready in a closet. |
| Expansion batteries | Let you add capacity later instead of buying a second station. |
| Fast AC charging | Refills in an hour or two when power returns briefly, or before a forecast storm. |
| Quiet operation | Matters if it sits in a bedroom overnight. See our noise level guide. |
| Indoor use | Battery stations make no exhaust, so they can run inside, unlike gas generators. |
Example Stations by Outage Size
A few current stations that match each tier, using maker specs and prices listed on Oct. 17, 2026. These are examples to compare, not hands-on test results.
| Model | Capacity | Inverter | Standout outage feature (per maker) | Best for |
|---|---|---|---|---|
| EcoFlow RIVER 3 Plus | 286Wh (expands to 858Wh) | 600W | <10 ms UPS switchover; $299 at EcoFlow | Evening blackouts, internet |
| EcoFlow RIVER 2 Pro | 768Wh | 800W | About 70-minute AC recharge; $389 at EcoFlow | Overnight with CPAP and a fan |
| Anker SOLIX C2000 Gen 2 | 2,048Wh | 2,400W | 10 ms UPS; $999.99 at Anker | A full day with a fridge |
| FOSSiBOT F2400 | 2,048Wh | 2,400W (4,800W surge) | High capacity for the price; $669 at FOSSiBOT | Budget full-day backup |
For a deeper look at the larger units, see our Anker SOLIX C2000 Gen 2 vs F2000 comparison and FOSSiBOT F2400 review.
Runtime Estimates for Common Outage Loads
Our estimates, using 85% of rated capacity. A refrigerator’s figure assumes it averages 100–150W over a day as its compressor cycles.
| Load | 286Wh | 768Wh | 2,048Wh |
|---|---|---|---|
| Router + modem, 15W | ~16 hours | ~43 hours | ~4.8 days |
| CPAP without humidifier, 40W | ~6 hours | ~16 hours | ~43 hours |
| Refrigerator, 100–150W average | ~1.6–2.4 hours | ~4–6.5 hours | ~11.5–17 hours |
| Furnace blower, 500W | ~30 minutes | ~1.3 hours | ~3.5 hours |
Getting Ready Before the Next Outage
- Charge the station fully and store it at room temperature; check it every few months.
- Do a test run: unplug your router or fridge and run it from the station for an hour to see real draw.
- Keep the right cables with it: a heavy-duty extension cord, the AC charging cable and any solar adapters.
- For connecting a station to home circuits, hire a licensed electrician rather than improvising.
Our storage and care guide covers keeping a station ready between storms.
One Big Station or Two Smaller Ones?
Some households do better with two stations than one large one. A small 300–800Wh unit can sit by the router or the bedside as a UPS full-time, while a 2kWh unit stays in the kitchen for the refrigerator. You get two charging inputs, two places for loads, and no need to run an extension cord across the house. The trade-off is two units to keep charged and, usually, a higher combined cost per watt-hour. If you’d rather have one station, pick one with expansion batteries so you can grow it later.
Five Mistakes to Avoid
- Sizing by peak watts alone. A 3,000W inverter doesn’t help if the battery runs out in two hours. Size capacity for the outage length first.
- Forgetting the startup surge. Refrigerators, well pumps and window ACs briefly draw much more than their running watts. Check the station’s surge rating.
- Counting on solar in a storm. Cloudy days after a storm can cut solar output sharply. Plan for a generator or extra capacity if outages in your area tend to last days.
- Leaving it at 0% in a closet. A station that isn’t charged when the power fails is no help. Top it up on a schedule.
- Running everything through the inverter. USB-C and 12V outputs skip the conversion loss, so phones, laptops and 12V devices run longer when plugged in directly.
Budget Guide
Prices from the maker stores on Oct. 17, 2026 give a sense of the range. A 286Wh LiFePO4 station like the RIVER 3 Plus listed at $299, a 768Wh RIVER 2 Pro at $389, and 2kWh-class stations from $669 (FOSSiBOT F2400) to $999.99 (Anker SOLIX C2000 Gen 2). Prices change often with sales, so compare cost per watt-hour and the features from Step 5, not just the sticker price.
FAQ
What size power station do I need for a power outage?
For internet and lights through a short outage, 250–500Wh. To keep a refrigerator running through a full day, about 2kWh, plus a recharge plan for longer outages.
Can a power station run a refrigerator during an outage?
Yes, if its inverter covers the fridge’s startup surge. A 2kWh station can run a typical fridge for roughly half a day to a day, by our estimates.
Is it safe to use a power station indoors?
Yes. Battery power stations make no exhaust. Keep vents clear and follow the maker’s temperature limits.
What is UPS mode on a power station?
The station passes wall power through to your devices and switches to battery when the grid fails. Switchover times are typically 10–20 ms.
How long are typical power outages?
The EIA says U.S. customers averaged 11 hours of interruptions in 2024, with major storms making up 80% of that, and about two hours a year from non-major events.
Bottom Line
Start with the devices you can’t do without and the outage length you want to cover, then pick capacity, an inverter that covers your biggest load, and a recharge plan. For most households, a 700Wh–1kWh station handles overnight essentials, and a 2kWh station with solar input carries a refrigerator through a long outage.
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