What size power station for a box fan (20 inch)?

It needs a station with at least 125 W of continuous output (starting watts not published, so the check uses running watts). At the default 85% efficiency it takes about 1,176 Wh of rated capacity for 8 hours of running, and 3,529 Wh for 24 hours of running. 54 of the 54 power stations in the Enough Watts data set can power it. The smallest one that keeps it going for 24 hours of running is the BLUETTI Elite 400 (3,840 Wh).

Updated October 6, 2026

125W
Continuous output
Not published
Surge to start it
1,176Wh
Capacity for 8 hours of running
3,529Wh
Capacity for 24 hours of running
54 of 54
Stations that power it

Watts

Typical figures for this type, from the sources at the foot of this page. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.

Running, typical: 125 W
Running, low to high: 50 W to 200 W
Starting: Not publishedmotors often need 2 to 3 times their running watts to start
Typical use a day: 8 hhours the motor actually runs
Average draw while on: 125 W
Voltage: 120 V

Counts the running watts for every hour you enter.
Starting watts not published; motors often need 2 to 3 times their running watts to start.

Explained in: Watts vs watt hours, explained, How to read an appliance label for watts and Starting watts explained.

The math

Worked with the typical figure, as the calculator does it.

Output125 W running, so the station's continuous output must be at least 125 W.
SurgeStarting watts are not published, so the surge check uses the 125 W running figure.
Average draw125 W: the running watts count for every hour it is on, as if the motor never paused.
A typical day125 W × 8 h = 1,000 Wh a day.
8 hours of running125 W × 8 h = 1,000 Wh usable, ÷ 0.85 = 1,176 Wh of rated capacity.
24 hours of running125 W × 24 h = 3,000 Wh usable, ÷ 0.85 = 3,529 Wh of rated capacity.
On the BLUETTI Elite 4003,840 Wh × 0.85 = 3,264 Wh usable, ÷ 125 W = 26.1 h.

Stations that run it

Every power station in the data with this appliance alone plugged in, at 85% efficiency. Type the running watts from your own label and the table works it out again.

Running watts

Typical 125 W, from 50 W to 200 W. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.

54 of 54 power stations run it at 125 W.

Power stations for a box fan (20 inch) at 125 W
Power station	Can it power it	Running time	Output	Start surge
BLUETTI Elite 10 Mini	Runs it	52 min	200 W	300 W
Jackery Explorer 240 v2	Runs it	1.7 h	300 W	600 W
EcoFlow RIVER 3 Plus	Runs it	1.9 h	600 W	1,200 W
BLUETTI Elite 30 V2	Runs it	2.0 h	600 W	not published
Jackery Explorer 300 v2	Runs it	2.0 h	300 W	600 W
Goal Zero Yeti 300	Runs it	2.0 h	350 W	600 W
Goal Zero Yeti 500	Runs it	3.4 h	500 W	1,000 W
DJI Power 500	Runs it	3.5 h	1,000 W	not published
Jackery Explorer 600 v2	Runs it	4.4 h	500 W	1,000 W
Goal Zero Yeti 700	Runs it	4.6 h	600 W	1,000 W
BLUETTI Elite 100 mini	Runs it	6.8 h	700 W	1,050 W
BLUETTI Elite 100 V2	Runs it	7.0 h	1,800 W	3,600 W
EcoFlow DELTA 3 Classic	Runs it	7.0 h	1,800 W	3,600 W
Anker SOLIX C1000 Gen 2	Runs it	7.0 h	2,000 W	3,000 W
EcoFlow DELTA 3	Runs it	7.0 h	1,800 W	3,600 W
EcoFlow DELTA 3 Plus	Runs it	7.0 h	1,800 W	3,600 W
Pecron E1000LFP	Runs it	7.0 h	1,800 W	3,000 W
DJI Power 1000	Runs it	7.0 h	2,200 W	4,400 W
Anker SOLIX C1000	Runs it	7.2 h	1,800 W	2,400 W
Jackery Explorer 1000 v2	Runs it	7.3 h	1,500 W	3,000 W
BLUETTI AC180	Runs it	7.8 h	1,800 W	2,700 W
ALLPOWERS R1500	Runs it	7.8 h	1,800 W	3,000 W
Jackery Explorer 1000 Plus	Runs it	8.6 h	2,000 W	4,000 W
Goal Zero Yeti 1500	Runs it	10.2 h	2,000 W	3,600 W
Jackery Explorer 1500 v2	Runs it	10.4 h	2,000 W	4,000 W
Jackery Explorer 1500 Ultra	Runs it	10.4 h	1,800 W	3,600 W
ALLPOWERS R2500 V2	Runs it	13.1 h	2,500 W	4,000 W
Jackery Explorer 2000 v2	Runs it	13.9 h	2,200 W	4,400 W
Jackery HomePower 2000 Plus v2	Runs it	13.9 h	2,400 W	4,800 W
EcoFlow DELTA 3 Max	Runs it	13.9 h	2,400 W	4,800 W
Pecron E2400LFP	Runs it	13.9 h	2,400 W	4,000 W
Anker SOLIX C2000 Gen 2	Runs it	13.9 h	2,400 W	4,000 W
EcoFlow DELTA 3 Max Plus	Runs it	13.9 h	3,000 W	6,000 W
OUPES Mega 2 Pro	Runs it	13.9 h	2,500 W	not published
DJI Power 2000	Runs it	13.9 h	3,000 W	not published
BLUETTI Elite 200 V2	Runs it	14.1 h	2,600 W	not published
Anker SOLIX F2600	Runs it	17.4 h	2,400 W	2,800 W
BLUETTI Apex 300	Runs it	18.8 h	3,840 W	not published
BLUETTI Elite 300	Runs it	20.5 h	2,400 W	4,800 W
EcoFlow DELTA 3 Ultra	Runs it	20.9 h	3,600 W	7,200 W
Anker SOLIX F3000	Runs it	20.9 h	3,600 W	7,200 W
EcoFlow DELTA 3 Ultra Plus	Runs it	20.9 h	3,600 W	7,200 W
Pecron E3600LFP	Runs it	20.9 h	3,600 W	7,000 W
ALLPOWERS R3500	Runs it	21.5 h	3,200 W	6,000 W
ALLPOWERS R4000	Runs it	23.5 h	3,600 W	6,000 W
BLUETTI Elite 400	Runs it	26.1 h	2,600 W	5,200 W
Anker SOLIX F3800	Runs it	26.1 h	6,000 W	9,000 W
Anker SOLIX F3800 Plus	Runs it	26.1 h	6,000 W	9,000 W
Goal Zero Yeti PRO 4000	Runs it	27.2 h	3,600 W	7,200 W
EcoFlow DELTA Pro 3	Runs it	27.9 h	4,000 W	8,000 W
OUPES Guardian 6000 V2	Runs it	31.3 h	6,000 W	9,000 W
Jackery Explorer 5000 Plus	Runs it	34.3 h	7,200 W	14,400 W
EcoFlow DELTA Pro Ultra	Runs it	41.8 h	7,200 W	10,800 W
EcoFlow DELTA Pro Ultra X	Runs it	3.5 days	12,000 W	not published

Add it to the runtime calculator with the rest of your list

What moves the number

The speed you pick changes the draw most: 50 W on low to 200 W on high, with 125 W in between. Window fans fall in the same range. No start surge is published.

Questions

How many watts does a box fan (20 inch) use?

About 125 W while running, from 50 W to 200 W across the models in our sources. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.

Can a portable power station run a box fan (20 inch)?

Yes. All 54 power stations in the Enough Watts data set can power it on its own. It takes at least 125 W of continuous output.

How long will a power station run a box fan (20 inch)?

It depends on the battery. At 85% efficiency the smallest station that powers it, the BLUETTI Elite 10 Mini (128 Wh), gives about 52 min. The largest, the EcoFlow DELTA Pro Ultra X (12,288 Wh), gives about 3.5 days.

Does a box fan (20 inch) need extra watts to start?

Its starting watts are not published, and motors often need 2 to 3 times their running watts to start. Without a published figure the site checks the start at the 125 W running figure, so leave headroom above that on your station.

Sources

Researched from these pages, then checked against them a second time. The check corrected at least one figure.

Generator Wattage Chart: Common Appliances & Tools - Champion Power Equipment generator maker guide, checked October 6, 2026

We read published figures and do the math; we do not measure appliances. The methodology states every formula on this page. Capacities are rated watt hours: 1,000 Wh rated gives 850 Wh usable at the default.