How long will the Anker SOLIX F3800 Plus run a box fan?

About 38 hours from a full charge. A box fan averages about 85 W, and the 3,840 Wh battery gives about 3,264 Wh after inverter losses. That is 2.6% of the battery an hour.

Can I run other things at the same time?

Yes, up to about 5,915 W more of the 6,000 W output. Each thing you add shares the same battery, so the 38 hours for a box fan gets shorter.

How many days of normal use is that?

About 4 days, if you use a box fan about 8 hours a day and nothing else is plugged in.

Anker SOLIX · Will it run?

Can the Anker SOLIX F3800 Plus run a box fan (20 in)?

Published October 16, 2026

Short answerYes

Yes. The Anker SOLIX F3800 Plus runs a box fan for about 38 hours from a full charge. At about 85 W on average it uses 2.6% of the battery an hour, and the 6,000 W output leaves plenty of room for more.

Add your other devices

Key numbers

Runtime: 38 hrs; from a full charge
Battery used per hour: 2.6%; at 85 W average

Box fan (20 in)

Running: 85 W; 56–200 W range
Start-up: 102 W
Average: 85 W; runs all the time

Anker SOLIX F3800 Plus

Battery: 3,840 Wh; about 3,264 Wh usable
Output: 6,000 W; continuous
Surge: 9,000 W; start-up peak

How we worked it out: 3,840 Wh × 0.85 ÷ 85 W = about 38 hours. The 0.85 covers inverter and battery losses. We do not test units ourselves; the numbers come from the official spec sheets and typical device draws. How we pick

Anker SOLIX F3800 Plus

3,840 Wh · 6,000 W output · 9,000 W surge · 136.7 lb

Full specs and runtimes

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What else the Anker SOLIX F3800 Plus runs

One device at a time, from a full charge.

Other power stations for a box fan

The nearest sizes that also run it.

Keep going

Real runtime depends on the model you own, room temperature and battery age. The 38 hours above is an estimate, not a measured result.

Common questions

How long will the Anker SOLIX F3800 Plus run a box fan?: About 38 hours from a full charge. A box fan averages about 85 W, and the 3,840 Wh battery gives about 3,264 Wh after inverter losses. That is 2.6% of the battery an hour.
Can I run other things at the same time?: Yes, up to about 5,915 W more of the 6,000 W output. Each thing you add shares the same battery, so the 38 hours for a box fan gets shorter.
How many days of normal use is that?: About 4 days, if you use a box fan about 8 hours a day and nothing else is plugged in.