What size power station for a window air conditioner (5,000 BTU)?

It needs a station with at least 525 W of continuous output and a surge rating of at least 1,050 W to start it. At the default 85% efficiency it takes about 4,941 Wh of rated capacity for 8 hours of running, and 14,824 Wh for 24 hours of running. 45 of the 54 power stations in the Enough Watts data set can power it. None of them keeps it going for 24 hours of running.

Updated October 6, 2026

525W
Continuous output
1,050W
Surge to start it
4,941Wh
Capacity for 8 hours of running
14,824Wh
Capacity for 24 hours of running
45 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: 525 W
Running, low to high: 347 W to 600 W
Starting: 1,050 W900 W to 1,200 W, 2 times running
Typical use a day: 8 hhours the motor actually runs
Average draw while on: 525 W
Voltage: 120 V

Assumes the motor runs the whole time; real use is often less.

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

The math

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

Output525 W running, so the station's continuous output must be at least 525 W.
Surge1,050 W to start, so its surge rating must be at least 1,050 W.
Average draw525 W: the running watts count for every hour it is on, as if the motor never paused.
A typical day525 W × 8 h = 4,200 Wh a day.
8 hours of running525 W × 8 h = 4,200 Wh usable, ÷ 0.85 = 4,941 Wh of rated capacity.
24 hours of running525 W × 24 h = 12,600 Wh usable, ÷ 0.85 = 14,824 Wh of rated capacity.
On the EcoFlow RIVER 3 Plus286 Wh × 0.85 = 243 Wh usable, ÷ 525 W = 28 min.

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 525 W, from 347 W to 600 W. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.

45 of 54 power stations run it at 525 W and 1,050 W to start.

Power stations for a window air conditioner (5,000 BTU) at 525 W
Power station	Can it power it	Running time	Output	Start surge
EcoFlow RIVER 3 Plus	Runs it	28 min	600 W	1,200 W
BLUETTI Elite 100 mini	Runs it	1.6 h	700 W	1,050 W
BLUETTI Elite 100 V2	Runs it	1.7 h	1,800 W	3,600 W
EcoFlow DELTA 3 Classic	Runs it	1.7 h	1,800 W	3,600 W
Anker SOLIX C1000 Gen 2	Runs it	1.7 h	2,000 W	3,000 W
EcoFlow DELTA 3	Runs it	1.7 h	1,800 W	3,600 W
EcoFlow DELTA 3 Plus	Runs it	1.7 h	1,800 W	3,600 W
Pecron E1000LFP	Runs it	1.7 h	1,800 W	3,000 W
DJI Power 1000	Runs it	1.7 h	2,200 W	4,400 W
Anker SOLIX C1000	Runs it	1.7 h	1,800 W	2,400 W
Jackery Explorer 1000 v2	Runs it	1.7 h	1,500 W	3,000 W
BLUETTI AC180	Runs it	1.9 h	1,800 W	2,700 W
ALLPOWERS R1500	Runs it	1.9 h	1,800 W	3,000 W
Jackery Explorer 1000 Plus	Runs it	2.0 h	2,000 W	4,000 W
Goal Zero Yeti 1500	Runs it	2.4 h	2,000 W	3,600 W
Jackery Explorer 1500 v2	Runs it	2.5 h	2,000 W	4,000 W
Jackery Explorer 1500 Ultra	Runs it	2.5 h	1,800 W	3,600 W
ALLPOWERS R2500 V2	Runs it	3.1 h	2,500 W	4,000 W
Jackery Explorer 2000 v2	Runs it	3.3 h	2,200 W	4,400 W
Jackery HomePower 2000 Plus v2	Runs it	3.3 h	2,400 W	4,800 W
EcoFlow DELTA 3 Max	Runs it	3.3 h	2,400 W	4,800 W
Pecron E2400LFP	Runs it	3.3 h	2,400 W	4,000 W
Anker SOLIX C2000 Gen 2	Runs it	3.3 h	2,400 W	4,000 W
EcoFlow DELTA 3 Max Plus	Runs it	3.3 h	3,000 W	6,000 W
OUPES Mega 2 Pro	Runs it	3.3 h	2,500 W	not published
DJI Power 2000	Runs it	3.3 h	3,000 W	not published
BLUETTI Elite 200 V2	Runs it	3.4 h	2,600 W	not published
Anker SOLIX F2600	Runs it	4.1 h	2,400 W	2,800 W
BLUETTI Apex 300	Runs it	4.5 h	3,840 W	not published
BLUETTI Elite 300	Runs it	4.9 h	2,400 W	4,800 W
EcoFlow DELTA 3 Ultra	Runs it	5.0 h	3,600 W	7,200 W
Anker SOLIX F3000	Runs it	5.0 h	3,600 W	7,200 W
EcoFlow DELTA 3 Ultra Plus	Runs it	5.0 h	3,600 W	7,200 W
Pecron E3600LFP	Runs it	5.0 h	3,600 W	7,000 W
ALLPOWERS R3500	Runs it	5.1 h	3,200 W	6,000 W
ALLPOWERS R4000	Runs it	5.6 h	3,600 W	6,000 W
BLUETTI Elite 400	Runs it	6.2 h	2,600 W	5,200 W
Anker SOLIX F3800	Runs it	6.2 h	6,000 W	9,000 W
Anker SOLIX F3800 Plus	Runs it	6.2 h	6,000 W	9,000 W
Goal Zero Yeti PRO 4000	Runs it	6.5 h	3,600 W	7,200 W
EcoFlow DELTA Pro 3	Runs it	6.6 h	4,000 W	8,000 W
OUPES Guardian 6000 V2	Runs it	7.5 h	6,000 W	9,000 W
Jackery Explorer 5000 Plus	Runs it	8.2 h	7,200 W	14,400 W
EcoFlow DELTA Pro Ultra	Runs it	9.9 h	7,200 W	10,800 W
EcoFlow DELTA Pro Ultra X	Runs it	19.9 h	12,000 W	not published
BLUETTI Elite 10 Mini	Cannot power itNeeds 525 W running at once; this station gives 200 W. Needs 1,050 W to start; this station peaks at 300 W.	none	200 W	300 W
Jackery Explorer 240 v2	Cannot power itNeeds 525 W running at once; this station gives 300 W. Needs 1,050 W to start; this station peaks at 600 W.	none	300 W	600 W
BLUETTI Elite 30 V2	Cannot power itNeeds 1,050 W to start. Its surge rating is not published, and its 600 W continuous rating is lower.	none	600 W	not published
Jackery Explorer 300 v2	Cannot power itNeeds 525 W running at once; this station gives 300 W. Needs 1,050 W to start; this station peaks at 600 W.	none	300 W	600 W
Goal Zero Yeti 300	Cannot power itNeeds 525 W running at once; this station gives 350 W. Needs 1,050 W to start; this station peaks at 600 W.	none	350 W	600 W
Goal Zero Yeti 500	Cannot power itNeeds 525 W running at once; this station gives 500 W. Needs 1,050 W to start; this station peaks at 1,000 W.	none	500 W	1,000 W
DJI Power 500	Cannot power itNeeds 1,050 W to start. Its surge rating is not published, and its 1,000 W continuous rating is lower.	none	1,000 W	not published
Jackery Explorer 600 v2	Cannot power itNeeds 525 W running at once; this station gives 500 W. Needs 1,050 W to start; this station peaks at 1,000 W.	none	500 W	1,000 W
Goal Zero Yeti 700	Cannot power itNeeds 1,050 W to start; this station peaks at 1,000 W.	none	600 W	1,000 W

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

What moves the number

Every certified 5,000 BTU unit is a 115 V variable speed model drawing about 347 W, and they start softly. A generator maker's chart lists 525 W to 600 W running and about 1,050 W to start, the figures this page uses. The label of the unit you own decides which applies.

Questions

How many watts does a window air conditioner (5,000 BTU) use?

About 525 W while running, from 347 W to 600 W across the models in our sources. It needs about 1,050 W for a moment at start. 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 window air conditioner (5,000 BTU)?

Yes. 45 of the 54 power stations in the Enough Watts data set can power it on its own. It takes at least 525 W of continuous output and a surge rating of 1,050 W.

How long will a power station run a window air conditioner (5,000 BTU)?

It depends on the battery. At 85% efficiency the smallest station that powers it, the EcoFlow RIVER 3 Plus (286 Wh), gives about 28 min. The largest, the EcoFlow DELTA Pro Ultra X (12,288 Wh), gives about 19.9 h.

Why does a window air conditioner (5,000 BTU) need a high surge rating?

Its motor draws about 1,050 W for a moment at start, 2 times its 525 W running figure. A station whose surge rating is below that cannot start it, even when the continuous output is enough. 45 of the 54 stations pass that check.

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
ENERGY STAR Certified Room Air Conditioners (data.energystar.gov dataset 5xn2-dv4h) government, 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.