Portable power station sizing calculator

Quick answer: Pick what you will run, set the hours and nights, and this calculator shows your daily watt-hours, the surge your station must handle, the battery size with a 20% buffer, and the solar watts to refill it. Every formula is shown with your numbers.

Power station with several devices plugged in, ready for sizing

Estimates only. Check your device labels and manuals; the label wins over our typical values. Not electrical advice. Hire a licensed electrician for any building wiring.

Your trip Days or nights away Average peak sun hours (0 if no solar) Battery you have or are looking at, in Wh (optional) Below freezing (cold weather cuts usable capacity by 15%)

Devices Search 201 devices

Add my own device Name Running watts (from the label) Starting watts (leave blank if the same) Hours per day

Your results

Daily energy: 0 Wh

Running at once: 0 W · Surge: 0 W

Battery needed: 0 Wh

Solar to refill a day: 0 W of panels

Your battery: 0

Show the math

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