How to Size a Portable Power Station for a Full Remote Workday

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Start by measuring your own setup

Your workday load is unique. Laptops, monitors, and routers vary widely by model, screen size, brightness, and what you are doing. The only number that matters is yours.

The easiest way to get it is a plug-in watt meter. Plug your laptop charger, monitor, and router into a power strip, plug the strip into the meter, and work normally for a while. Note the average watts, not just the peak.

If you do not have a meter, read the label on each device or its power brick, or check the maker's spec page. Labels usually show a maximum, so your real average is often lower, but the label gives you a safe upper bound.

• Measure during real work, with your normal screen brightness and apps open.
• Include anything else on your desk: a desk lamp, phone charger, or second monitor.
• Remember the modem if it is a separate box from your router.

Do the watt-hour math

Power stations are rated in watt-hours. Your need is your average watts multiplied by the hours you plan to run.

For example, if your laptop, monitor, and router add up to 100 watts on the meter and you work 10 hours, you need 1,000 watt-hours before any losses or headroom.

Then add margin. Running AC devices through the power station's inverter costs some energy, the battery may not deliver every rated watt-hour, and capacity slowly declines with use. The maker's runtime chart or spec sheet often shows usable output at a given load, so check it against your measured watts.

If the outage might last more than one day, multiply again by the number of workdays you want to cover without recharging.

The runtime table gives hours for a laptop and for a modem and router on four stations. It's arithmetic, not a test, so check your maker's chart too.

Check output and outlets, not just capacity

Capacity decides how long you run. Output decides what you can run at once. Check the continuous AC rating and the separate surge or starting rating on the spec sheet, and make sure your combined load sits well under the continuous figure.

Count the outlets you need and look at the layout. Large power bricks can block neighboring outlets. If your laptop or other gear can charge from a USB-C or DC port on the power station, check the maker's spec sheet to see whether that port can supply what your device asks for.

• Confirm enough AC outlets for every brick and plug.
• Check spacing so bulky adapters fit side by side.
• Compare USB and DC port ratings with what your devices require.

Plan how you will recharge

A single charge covers your workday only if the outage ends soon. For longer outages, know how you will refill the battery. Common options are wall power when it returns, a car outlet, solar panels, or a generator.

If you recharge from a gas generator, run it outdoors only, at least 20 feet from the house and away from windows, doors, and vents, and never in a garage, because of carbon monoxide.

Check the spec sheet for recharge inputs and whether the unit supports pass-through charging, so you can keep working while it refills.

Where the linked listing fits

The listing on this page is the EcoFlow DELTA 2 Max, a large portable power station. Before buying it or any unit, compare its published usable capacity and continuous output with the numbers you measured, look at its outlet layout photos, and read the warranty terms.

Keep in mind that a power station keeps your own gear running, but your internet only works if your provider's network is still up in your area. Have a phone hotspot as a backup plan. If you only need a few minutes to save work and shut down, a desk battery backup (UPS) may suit you better.

Sources

Recorded AI check: Oct 26, 2026. The sources below may include later additions. AI checks compare factual numbers and checkable claims with web sources; they do not verify every statement.

• EcoFlow DELTA 2 Max User Manual V1.0 (PDF)
• EcoFlow DELTA 2 Max | Portable Power Station | EcoFlow US
• WFH power outage backup to stay online 8 hours - Anker SOLIX US
• How Many Watts Does a Laptop Charger Use? - Anker
• Estimating Appliance and Home Electronic Energy Use, Virginia Cooperative Extension BSE-301 (PDF)
• CPSC Safety Alert 5123: Portable Generators (PDF)
• How can I provide enough runtime for my equipment during an outage? - Tripp Lite (PDF)
• CPSC: What You Should Know About Using Portable Generators (PDF)

Best home battery backup power station and Jackery vs EcoFlow compare units from the makers' numbers. Every guide in this class is in Portable power stations.

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