How long will the Goal Zero Yeti 500 run a Wi-Fi router + cable modem?

About 17 hours from a full charge. A Wi-Fi router + cable modem averages about 25 W, and the 499 Wh battery gives about 424 Wh after inverter losses. That is 5.9% of the battery an hour.

Can I run other things at the same time?

Yes, up to about 475 W more of the 500 W output. Each thing you add shares the same battery, so the 17 hours 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), more than the 424 Wh the Goal Zero Yeti 500 can deliver, so plan to recharge every 17 hours.

Goal Zero · Will it run?

Can the Goal Zero Yeti 500 run a Wi-Fi router + cable modem?

Published October 11, 2026

Short answerYes

Yes. The Goal Zero Yeti 500 runs a Wi-Fi router + cable modem for about 17 hours from a full charge. At about 25 W on average it uses 5.9% of the battery an hour, and the 500 W output leaves plenty of room for more.

Add your other devices

Key numbers

Runtime: 17 hrs; from a full charge
Battery used per hour: 5.9%; 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

Goal Zero Yeti 500

Battery: 499 Wh; about 424 Wh usable
Output: 500 W; continuous
Surge: 1,000 W; start-up peak

How we worked it out: 499 Wh × 0.85 ÷ 25 W = about 17 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

Goal Zero Yeti 500

499 Wh · 500 W output · 1,000 W surge · 16.1 lb

Full specs and runtimes

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What else the Goal Zero Yeti 500 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 17 hours above is an estimate, not a measured result.

Common questions

How long will the Goal Zero Yeti 500 run a Wi-Fi router + cable modem?: About 17 hours from a full charge. A Wi-Fi router + cable modem averages about 25 W, and the 499 Wh battery gives about 424 Wh after inverter losses. That is 5.9% of the battery an hour.
Can I run other things at the same time?: Yes, up to about 475 W more of the 500 W output. Each thing you add shares the same battery, so the 17 hours 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), more than the 424 Wh the Goal Zero Yeti 500 can deliver, so plan to recharge every 17 hours.