What size power station for a desktop PC (office tower, no monitor)?

It needs a station with at least 81 W of continuous output. At the default 85% efficiency it takes about 572 Wh of rated capacity for its typical 6 h a day, and 762 Wh for 8 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 8 hours of running is the BLUETTI Elite 100 mini (1,005 Wh).

Updated October 6, 2026

81W
Continuous output
None
Surge to start it
572Wh
Capacity for its typical 6 h a day
762Wh
Capacity for 8 hours of running
54 of 54
Stations that power it

Wattsestimate

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: 81 W
Running, low to high: 14 W to 207 W
Starting: No start surge
Typical use a day: 6 hthe calculator starts from this, and you can change it
Average draw while on: 81 W
Voltage: 120 V

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

The math

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

Output81 W running, so the station's continuous output must be at least 81 W.
SurgeNo start surge: the running figure covers it.
Average draw81 W: the running watts count for every hour it is on.
A typical day81 W × 6 h = 486 Wh a day.
Typical 6 h a day81 W × 6 h = 486 Wh usable, ÷ 0.85 = 572 Wh of rated capacity.
8 hours of running81 W × 8 h = 648 Wh usable, ÷ 0.85 = 762 Wh of rated capacity.
On the BLUETTI Elite 100 mini1,005 Wh × 0.85 = 854 Wh usable, ÷ 81 W = 10.5 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 81 W, from 14 W to 207 Westimate. 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 81 W.

Power stations for a desktop PC (office tower, no monitor) at 81 W
Power station	Can it power it	Running time	Output	Start surge
BLUETTI Elite 10 Mini	Runs it	1.3 h	200 W	300 W
Jackery Explorer 240 v2	Runs it	2.7 h	300 W	600 W
EcoFlow RIVER 3 Plus	Runs it	3.0 h	600 W	1,200 W
BLUETTI Elite 30 V2	Runs it	3.0 h	600 W	not published
Jackery Explorer 300 v2	Runs it	3.0 h	300 W	600 W
Goal Zero Yeti 300	Runs it	3.1 h	350 W	600 W
Goal Zero Yeti 500	Runs it	5.2 h	500 W	1,000 W
DJI Power 500	Runs it	5.4 h	1,000 W	not published
Jackery Explorer 600 v2	Runs it	6.7 h	500 W	1,000 W
Goal Zero Yeti 700	Runs it	7.1 h	600 W	1,000 W
BLUETTI Elite 100 mini	Runs it	10.5 h	700 W	1,050 W
BLUETTI Elite 100 V2	Runs it	10.7 h	1,800 W	3,600 W
EcoFlow DELTA 3 Classic	Runs it	10.7 h	1,800 W	3,600 W
Anker SOLIX C1000 Gen 2	Runs it	10.7 h	2,000 W	3,000 W
EcoFlow DELTA 3	Runs it	10.7 h	1,800 W	3,600 W
EcoFlow DELTA 3 Plus	Runs it	10.7 h	1,800 W	3,600 W
Pecron E1000LFP	Runs it	10.7 h	1,800 W	3,000 W
DJI Power 1000	Runs it	10.7 h	2,200 W	4,400 W
Anker SOLIX C1000	Runs it	11.1 h	1,800 W	2,400 W
Jackery Explorer 1000 v2	Runs it	11.2 h	1,500 W	3,000 W
BLUETTI AC180	Runs it	12.1 h	1,800 W	2,700 W
ALLPOWERS R1500	Runs it	12.1 h	1,800 W	3,000 W
Jackery Explorer 1000 Plus	Runs it	13.3 h	2,000 W	4,000 W
Goal Zero Yeti 1500	Runs it	15.8 h	2,000 W	3,600 W
Jackery Explorer 1500 v2	Runs it	16.1 h	2,000 W	4,000 W
Jackery Explorer 1500 Ultra	Runs it	16.1 h	1,800 W	3,600 W
ALLPOWERS R2500 V2	Runs it	20.1 h	2,500 W	4,000 W
Jackery Explorer 2000 v2	Runs it	21.4 h	2,200 W	4,400 W
Jackery HomePower 2000 Plus v2	Runs it	21.5 h	2,400 W	4,800 W
EcoFlow DELTA 3 Max	Runs it	21.5 h	2,400 W	4,800 W
Pecron E2400LFP	Runs it	21.5 h	2,400 W	4,000 W
Anker SOLIX C2000 Gen 2	Runs it	21.5 h	2,400 W	4,000 W
EcoFlow DELTA 3 Max Plus	Runs it	21.5 h	3,000 W	6,000 W
OUPES Mega 2 Pro	Runs it	21.5 h	2,500 W	not published
DJI Power 2000	Runs it	21.5 h	3,000 W	not published
BLUETTI Elite 200 V2	Runs it	21.8 h	2,600 W	not published
Anker SOLIX F2600	Runs it	26.9 h	2,400 W	2,800 W
BLUETTI Apex 300	Runs it	29.0 h	3,840 W	not published
BLUETTI Elite 300	Runs it	31.6 h	2,400 W	4,800 W
EcoFlow DELTA 3 Ultra	Runs it	32.2 h	3,600 W	7,200 W
Anker SOLIX F3000	Runs it	32.2 h	3,600 W	7,200 W
EcoFlow DELTA 3 Ultra Plus	Runs it	32.2 h	3,600 W	7,200 W
Pecron E3600LFP	Runs it	32.2 h	3,600 W	7,000 W
ALLPOWERS R3500	Runs it	33.2 h	3,200 W	6,000 W
ALLPOWERS R4000	Runs it	36.3 h	3,600 W	6,000 W
BLUETTI Elite 400	Runs it	40.3 h	2,600 W	5,200 W
Anker SOLIX F3800	Runs it	40.3 h	6,000 W	9,000 W
Anker SOLIX F3800 Plus	Runs it	40.3 h	6,000 W	9,000 W
Goal Zero Yeti PRO 4000	Runs it	41.9 h	3,600 W	7,200 W
EcoFlow DELTA Pro 3	Runs it	43.0 h	4,000 W	8,000 W
OUPES Guardian 6000 V2	Runs it	2.0 days	6,000 W	9,000 W
Jackery Explorer 5000 Plus	Runs it	2.2 days	7,200 W	14,400 W
EcoFlow DELTA Pro Ultra	Runs it	2.7 days	7,200 W	10,800 W
EcoFlow DELTA Pro Ultra X	Runs it	5.4 days	12,000 W	not published

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

What moves the number

Workload moves the number. An office tower draws about 14 W at idle; 81 W adds the rated power of a midrange processor at work, and 207 W is the ceiling of a typical office power supply. The monitor counts separately.

A desktop restarts if its power cuts out. The backup mode guide explains what the switch time of a station means for it.

Questions

How many watts does a desktop PC (office tower, no monitor) use?

About 81 W while running, from 14 W to 207 W across the models in our sources. That figure is an estimate: few published figures exist for this type. 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 desktop PC (office tower, no monitor)?

Yes. All 54 power stations in the Enough Watts data set can power it on its own. It takes at least 81 W of continuous output.

How long will a power station run a desktop PC (office tower, no monitor)?

It depends on the battery. At 85% efficiency the smallest station that powers it, the BLUETTI Elite 10 Mini (128 Wh), gives about 1.3 h. The largest, the EcoFlow DELTA Pro Ultra X (12,288 Wh), gives about 5.4 days.

Does a desktop PC (office tower, no monitor) need extra watts to start?

No. It has no motor or compressor, so it draws about its running watts from the moment it is switched on. The check that matters is a continuous output of at least 81 W.

Sources

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

QuickSpecs HP ProDesk 2 Tower G1i E Desktop PC maker specification sheet, checked October 6, 2026
QuickSpecs HP Pro Tower 290 G9 Desktop PC maker specification sheet, checked October 6, 2026
ENERGY STAR Certified Computers V9.0 (data.energystar.gov dataset rxdj-2c88) 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.