Portable Power Stations for Home Backup
A portable power station is a big rechargeable battery with outlets. It runs quietly indoors with no fumes, which makes it the simplest backup for phones, lights, a CPAP, Wi-Fi and short fridge runs.
What to Look For
Two numbers decide most of it: how much energy the battery stores and how much power it can deliver at once.
Capacity (Wh)
Watt-hours set how long it runs. Add up what you'll power and how many hours, then allow for inverter losses.
Output (W) and surge
Continuous watts must cover everything running at once; surge covers motor start-up such as fridges and pumps.
Chemistry and recharging
LiFePO4 batteries are rated for many more cycles. Check AC, solar and car charging inputs and speeds.
Our Picks
Three LiFePO4 stations in the 1 kWh class, the sweet spot for home backup of essentials.
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Picks are based on manufacturer-published specifications and the buying criteria on this page, not on paid placement or hands-on lab testing. Specs quoted are the manufacturer's; check the listing for the current model before you buy.
How to Choose a Portable Power Station
A portable power station combines a large lithium battery, an inverter that produces household-style AC power, and a set of USB and DC outputs in one box. Unlike a fuel generator, it makes no exhaust, so it can be used indoors, and it's nearly silent. The trade-off is that it stores a fixed amount of energy: once the battery is empty, you need wall power, solar panels or a car to refill it.
Capacity: watt-hours
Capacity is measured in watt-hours (Wh). A 1,000 Wh station can, in theory, supply 100 watts for 10 hours. In practice, converting battery power to AC loses some energy, so plan on getting roughly 80 to 90 percent of the rated capacity when running AC devices. (DC and USB outputs are usually a bit more efficient.) To size a station, list what you want to run, multiply each device's watts by the hours you'll run it, and add them up. Our sizing guide walks through the arithmetic.
Output: continuous and surge watts
The inverter's continuous rating is the most power the station can deliver at once. Add up everything you'll run simultaneously and make sure you're under it. Devices with motors or compressors, such as refrigerators, sump pumps and some power tools, draw a brief surge when they start that can be several times their running watts; the station's surge rating has to cover that. Check the device's label or manual for its rating, or measure it with a plug-in watt meter.
Battery chemistry
Many current power stations use lithium iron phosphate (LiFePO4 or LFP) cells. Manufacturers commonly rate LFP batteries for thousands of charge cycles, far more than older lithium-ion (NMC) designs, and LFP is generally considered more thermally stable. LFP stations tend to be a little heavier for the same capacity. For a backup that may sit for years and be used occasionally, cycle life matters less than how well the station holds a charge in storage; most makers recommend topping up every few months.
Recharging
Look at how fast the station recharges from a wall outlet, how much solar input it accepts (in watts and volts), and whether it can charge from a car's 12 V outlet. During a long outage, solar input is what keeps the station useful. Faster wall charging is handy when power returns briefly between outages.
Outlets and features
- Pure sine wave AC is standard on reputable stations and is what sensitive electronics expect.
- UPS or EPS switchover lets some stations take over when grid power drops. Switchover times vary; check the spec if you plan to protect a computer or CPAP.
- Expandability through add-on batteries lets you start small and grow.
- App monitoring is convenient but optional; the built-in display usually shows the essentials.
Safety
Follow the manufacturer's instructions for ventilation and placement, keep the station dry, and don't cover its vents. A power station is not a substitute for a fuel generator for whole-home backup, but it's the safest choice for running essentials indoors. If you also own a fuel generator, it must only run outdoors, far from doors and windows; see our generator accessories guide.