The lights flicker twice and go out for good around nine at night, and within an hour the group chat for your street lights up with the same question: does anyone still have power? If you've been through even one multi-day outage — a nor'easter that took down a transformer, a Gulf Coast hurricane that knocked out the grid for a week, a heat-wave brownout in Phoenix — you already know the panic isn't about the lights. It's about the fridge full of groceries you can't afford to lose, the phone battery you're rationing for emergency calls, and whatever's plugged into a CPAP machine or an oxygen concentrator in the next room. Candles and flashlights cover the first few hours just fine, but by hour twelve the questions get more serious: how long until the insulin in the door of the fridge is no good, and does the neighbor with the generator have enough gas to share. That's the moment a lot of households decide a battery-based backup is worth the money, usually while still sitting in the dark. September is exactly when that decision gets made, because Atlantic hurricane season runs through the end of November and most of the country starts thinking about winter storms right after.
Portable power stations solved that panic for a lot of households over the past few years, and retail interest predictably spikes every fall. The problem is that the category has splintered into a dozen sub-brands with overlapping model numbers, and the marketing copy on every listing promises the unit will "power your whole home" — which is true for almost none of them. Buying the wrong size wastes $200 to $800, and buying the right size takes about ten minutes of arithmetic that most retailers never walk you through.
What a Power Station Actually Is (and Isn't)
A portable power station is a battery, an inverter, and a charge controller built into one box with outlets on the front — think of it as a much bigger, much smarter version of the battery pack you'd use to charge a phone on a road trip. Capacity is measured in watt-hours (Wh), and output is measured in watts (W). Those two numbers answer two completely different questions, and conflating them is where most buyers go wrong.
Watt-hours tell you how long the unit can run something. Watts tell you whether it can run that thing at all. A station rated at 1,000Wh with a 600W inverter has plenty of stored energy but can't start a window air conditioner that draws a 1,500W surge on startup — the battery would be sitting there nearly full while the unit shuts itself off on overload protection. This is different from a gas generator, which most people already understand intuitively: you wouldn't expect a 2,000-watt generator to run a 4,000-watt electric range, and the same ceiling applies here, just quieter and without the exhaust fumes.
Sizing It: The Math Retailers Skip
Start by listing what actually needs to stay on, not what you'd like to stay on. A standard refrigerator draws roughly 150W while running but only cycles about a third of the time, averaging closer to 1–2 kWh per day — so a 1,000Wh station keeps a fridge alive for roughly half a day between recharges, not a full 24 hours, and that's before you add anything else to the load.
Add up your must-haves with their run-time watts, not their nameplate maximum:
- Phone and laptop charging: 20–100W combined, negligible on the total budget
- A CPAP machine typically pulls 30–60W, which sounds trivial until you realize it needs to run for eight straight hours every night without interruption
- A window fan or box fan: 40–100W
- A router and modem, if you want internet during the outage: 15–30W combined
- A small window AC unit: 500–900W running, with a surge that can spike past 1,500W on startup, and this is the one that eliminates most sub-$400 stations outright
- Medical devices, sump pumps, security systems, and whatever else is specific to your household — the list above covers the common cases, not every case
Multiply your total running wattage by the hours you need coverage, and that's your daily watt-hour requirement before accounting for the roughly 10–15% conversion loss every inverter has. If your must-run list adds up to 300W and you want twelve hours of coverage, you need about 4,000Wh of stored capacity or a way to recharge mid-outage — which almost nobody buys, and which is exactly why so many power stations end up dead by day two of a real storm.
Where the Money Actually Goes
Entry-level units in the 250–300Wh range — the Jackery Explorer 300 Plus at around $250 or the Anker SOLIX C300 around $220 — are built for keeping phones, a router, and a CPAP running through a short outage or for camping, not for a fridge. They're the right call if your outages typically run a few hours and resolve before dinner.
The mid-tier, roughly 1,000–1,100Wh, is where most households actually end up, and it's worth understanding why the pricing lands where it does. The Jackery Explorer 1000 v2 runs about $600, EcoFlow's Delta 2 sits around $800, and Bluetti's AC180 lands near $650 — all three use LiFePO4 cells, which cost more per watt-hour than the cheaper lithium-ion packs but last roughly six times as many charge cycles. These units can run a fridge intermittently for most of a day, keep a CPAP going overnight without a hiccup, and handle a fan and some lighting on top of that, which covers what a typical household actually loses sleep over during an outage. They still choke on a window AC unit for more than a token stretch, though, so anyone counting on cooling through a multi-day summer outage needs to look past this tier entirely. Step up to the 2,000Wh-plus class — Anker's SOLIX F2000 or EcoFlow's Delta Pro, both north of $1,400 — and you're finally in true whole-room territory, capable of running a small AC unit for several hours alongside everything else on the list. That jump in price buys real capability, not just a bigger number on the box.
Don't buy capacity for a scenario you don't actually have. If your outages are the "power's back by morning" kind that most suburban grids see a few times a year, a 1,000Wh unit and a plan to ration the fridge is the smarter purchase than a $1,500 unit that sits in a closet for eleven months. Get the mid-tier unit if your outages historically run under 24 hours; only go bigger if you're in a hurricane corridor or a wildfire-adjacent grid where multi-day outages are a real, repeated pattern rather than a hypothetical.
Solar Panels Change the Math — Sometimes
Every major brand sells a folding solar panel to pair with its stations, usually 100–220W, and the pitch is that you can recharge indefinitely during a long outage instead of just running down a fixed reserve. That's true in September in Florida or Texas, where you'll get five or six hours of strong sun even during storm season. It's much less true in the Pacific Northwest in December, where a 200W panel might realistically deliver 60–80W average through an overcast winter day — enough to slow the drain, not reverse it. Check your region's average solar hours before treating a panel as a real backup plan rather than a nice-to-have.
The Mistakes That Show Up in Every Storm-Prep Thread
Buying based on total joules advertised rather than continuous AC output is the single most common error — a station can list 1,500Wh of capacity and still fail to start a space heater because the inverter caps out at 1,000W continuous. Read the spec sheet for "rated AC output," not just "capacity," before anything else.
The second mistake is letting the unit sit unused and undercharged between events. Lithium iron phosphate (LiFePO4) batteries, which most 2026 models use instead of the older NMC chemistry, hold charge for months and tolerate being left at 100% far better than older lithium-ion packs, but they still self-discharge slowly and should get a top-off check every three or four months, not just when a storm is forecast three days out.
Skip anything still built on NMC chemistry at a comparable price to a LiFePO4 competitor. The cycle life difference is roughly 500 cycles versus 3,000-plus, meaning an NMC unit you buy today may need replacing around year three or four of regular seasonal use, while a comparable LiFePO4 station is rated to outlast a decade of the same pattern.
What to Actually Buy This Month
If you've never owned one and your outages are typically short, start with a 1,000Wh-class unit and a single 100W solar panel — that combination covers a CPAP, a router, phone charging, and intermittent fridge power through a 24-to-36-hour outage, which describes the overwhelming majority of residential power loss events in the continental US. Households in hurricane-prone counties along the Gulf and Southeast coasts, where outages routinely stretch past three days, are better served jumping straight to the 2,000Wh-plus tier even though it costs roughly double, because the alternative is running out of stored power on day two with no reliable way to recharge.
Check the return window before you buy. Most major retailers give you 30 to 45 days, which is enough time to run the unit through one real test — plug in your actual fridge, actual CPAP, actual fan, and see how many hours you get, rather than trusting a spec sheet built around a theoretical average load.