Generator vs. portable power station: which should you buy for outages?
Both can keep a fridge, router and lights running. They fail in different ways: a generator is limited by fuel and safety setup; a power station is limited by battery energy (Wh).
The key difference: watts vs. watt-hours
- Watts (W) = how much you can run at once. Generators and stations both have a continuous rating and a surge rating.
- Watt-hours (Wh) = how long you can run it. A power station’s battery is a fixed number; a generator’s “battery” is its fuel tank, which you can refill.
Runtime for a station: Wh × efficiency ÷ load W. A hypothetical 1,000 Wh station on a 100 W load at 85% efficiency runs about 8.5 hours. Use the runtime calculator.
Side-by-side
| Portable generator | Portable power station | |
|---|---|---|
| Limits you by | Fuel on hand and your ability to refuel | Battery Wh (recharge by wall power, car, or solar) |
| Carbon monoxide | Yes — must run outdoors, >20 ft from windows, doors, vents (CDC) | No combustion exhaust (battery-based); still follow the maker’s instructions |
| Best for | Long outages and big 240 V loads (well pump, central AC) when sized and connected correctly | Fridge, networking gear, CPAP, phones and lights for hours to a couple of days |
| Starting loads | Size to running total + largest motor start (calculator) | Check the station’s surge rating against motor starts |
| Setup | Fuel storage, maintenance; transfer switch/interlock installed by an electrician for house circuits | Plug appliances directly; charge it ahead of storms |
How to decide
- List what you must keep on (fridge, sump pump, medical device, router, a fan). Total it with the wattage chart.
- Decide how many hours or days you need. Multiply watts × hours for Wh.
- If the Wh figure fits a battery you can afford and your loads are modest, a power station is the simplest and safest indoor-adjacent option.
- If you need hundreds of kWh over many days or must run 240 V loads, you likely need a generator — or both: a generator to recharge the station.
Safety. Never run a generator in a garage, basement, or near open windows. Use battery-powered CO detectors. Never connect a generator to a house outlet; use an electrician-installed transfer switch or interlock and check local rules with your utility.