How long will the Anker SOLIX F3800 Plus run a Wi-Fi router + cable modem?

About 5 days from a full charge. A Wi-Fi router + cable modem averages about 25 W, and the 3,840 Wh battery gives about 3,264 Wh after inverter losses. That is 0.8% of the battery an hour.

Can I run other things at the same time?

Yes, up to about 5,975 W more of the 6,000 W output. Each thing you add shares the same battery, so the 5 days for a Wi-Fi router + cable modem gets shorter.

How much of the battery does a Wi-Fi router + cable modem use in a day?

About 600 Wh a day (25 W × 24 hours), 18% of the 3,264 Wh the Anker SOLIX F3800 Plus can deliver.

Anker SOLIX · Will it run?

Can the Anker SOLIX F3800 Plus run a Wi-Fi router + cable modem?

Published October 11, 2026

Short answerYes

Yes. The Anker SOLIX F3800 Plus runs a Wi-Fi router + cable modem for about 5 days from a full charge. At about 25 W on average it uses 0.8% of the battery an hour, and the 6,000 W output leaves plenty of room for more.

Add your other devices

Key numbers

Runtime: 5 days; from a full charge
Battery used per hour: 0.8%; at 25 W average

Wi-Fi router + cable modem

Running: 25 W; 10–66 W range
Start-up: 25 W
Average: 25 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 ÷ 25 W = about 5 days. 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 Wi-Fi router + cable modem

The nearest sizes that also run it.

Keep going

Real runtime depends on the model you own, room temperature and battery age. The 5 days above is an estimate, not a measured result.

Common questions

How long will the Anker SOLIX F3800 Plus run a Wi-Fi router + cable modem?: About 5 days from a full charge. A Wi-Fi router + cable modem averages about 25 W, and the 3,840 Wh battery gives about 3,264 Wh after inverter losses. That is 0.8% of the battery an hour.
Can I run other things at the same time?: Yes, up to about 5,975 W more of the 6,000 W output. Each thing you add shares the same battery, so the 5 days for a Wi-Fi router + cable modem gets shorter.
How much of the battery does a Wi-Fi router + cable modem use in a day?: About 600 Wh a day (25 W × 24 hours), 18% of the 3,264 Wh the Anker SOLIX F3800 Plus can deliver.