Generator vs Portable Power Station: Which for Outages?
Both keep the lights, fridge and phones going when the grid is down. The decision is mostly about how long the outage lasts and which loads must keep running. Add up your own loads in the two calculators and compare the answers: with a refrigerator, sump pump, furnace blower, microwave, lights and a computer, for example, the generator size calculator recommends a generator of about 5,000 running watts, and a lighter list of a refrigerator, router, lights, laptop and phones in the power station calculator comes to about 2,335 Wh a day, which points to a power station of 3,000 Wh or more.
Part of the project planner: Planning backup power, batteries and solar.
How they compare
| Gas generator | Portable power station | |
|---|---|---|
| Where it can run | Outdoors only, with the exhaust away from the house | Indoors, because it has no exhaust |
| Noise | Loud; inverter models are quieter | Almost silent |
| Runtime | As long as you have fuel | Until the battery is empty, then recharge from the wall or solar panels |
| Heavy loads | Better for motors, central air and well pumps | Limited by its output watts and surge rating |
| Upkeep | Fuel storage, oil and a test run every few months | Keep it charged; little else |
Choosing
- Short outages, light loads: a power station is simple, safe indoors and silent. Add solar panels to extend it (see the runtime calculator).
- Long outages, heavy loads: a generator, with a manual transfer switch installed by an electrician if you want to power circuits safely.
- Both: plenty of households keep a power station for the fridge and electronics and a generator for the heavy loads.
- Safety first: never run a generator indoors or in a garage, never back-feed the house through an outlet, and fit battery-backed carbon monoxide alarms.
The generator sizing guide and power station sizing guide give the worked examples, and the backup power planner shows the order of the work.
Wattages of common appliances: generator wattage chart.
Frequently asked questions
Can a portable power station run a refrigerator?
Often yes, for a limited time. A refrigerator cycles on and off, so its daily energy use matters more than its running watts. Enter it in the power station calculator to see the battery size needed.
Can I run a generator in the garage?
No. Never run a generator in a garage, a basement or near a window or door, because carbon monoxide can build up inside the house. Run it outdoors, well away from openings, and fit working CO alarms.
Can a power station run a furnace or a well pump?
Small units can run the blower or the control board of a furnace, but motors that draw a big surge when they start, such as well pumps and central air, are usually a job for a generator or a larger system. Check the surge rating.
What about a whole-house standby generator?
That is a different product, fitted by a licensed electrician with a transfer switch. Our guides cover the portable options.
More guides
Tools & materials for this project
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Estimates only. Quantities depend on your materials, site and supplier. Confirm important numbers before you order, and follow local building codes for anything structural.