What Size Inverter Do You Need for a Power Station?

Continuous output: the number that sets inverter size

Electricity is measured in units of power called watts, named after James Watt, and one watt is a very small amount of power, as the U.S. Energy Information Administration explains. On a portable power station listing, the continuous output figure, stated in watts, is the amount of power the AC outlets can supply on an ongoing basis. It is the main number for answering an inverter size question.

The figure sits in the listing title or the first bullet, usually as a plain watt number, and it is one of the first words a shopper sees. A station with a higher continuous output can supply more power at once through its AC outlets, which matters when several devices run at the same time. The buying guides compare this stated figure across models rather than repeating a maker's marketing claim.

Surge and peak: the short-term watt figures

Some listings also print a surge or peak watt figure that is higher than the continuous output. Many appliances and tools draw more power for a brief moment when they start, then settle to a lower running load, and the surge figure is meant to cover that startup moment. One maker's listing, for example, prints 1,500W continuous with a 3,000W peak figure.

Makers give these features their own names, such as power lifting or a boosted output mode. Read the name and the maker's description on its page. The continuous output figure remains the number to compare for ongoing use, because surge is a short-term figure on a listing, not a claim about what a station will run continuously.

Output watts and capacity watt-hours are different figures

A listing can carry two figures: the continuous output in watts and the stored capacity in watt-hours. Watts describe the rate at which power flows, while watt-hours describe the amount of energy stored. Inverter size is a watts question; capacity is a separate watt-hours question, and a buyer should read both.

Makers print the two side by side on their product pages, for example an output figure and a capacity figure such as 1,800W and 1,024Wh on one compact model. The article on watt-hours and amp-hours explains how the capacity figure reads on a listing.

Matching the figure to what you plan to run

Answer the size question by comparing the continuous output figure with the devices you expect to plug in. Think about the largest single appliance or tool you will run and whether more than one will run at the same time. The listing states the station's continuous output, and the maker's page states what a model supports, so read both before you decide.

This site gives no runtime figures and no appliance-by-appliance list, because a listing's stated details do not carry that information. What the site can do is compare the stated continuous output across models, explain how a surge figure reads, and point you to the maker's page. See how many watts do I need and surge power versus constant load for more.

Output groups and budget tiers

The buying guides group stations by output and by capacity. Small stations suit phones, laptops, and small electronics; mid stations suit a campsite or a desk; large stations suit tools, larger appliances, and home backup shopping. Budget guides sort the same stations by price tier. None of these groups guarantee that a specific appliance will run; the continuous output figure on each listing is the number to read.

For home backup shopping, the U.S. Energy Information Administration reports that the average U.S. household consumes about 10,500 kilowatt-hours per year. A portable power station stores a much smaller amount, which is why the guides treat home backup as a station that runs selected essentials, not a whole house. Compare stations in the best portable power station guide, the camping guide, and the home backup guide.

Where to read the numbers before you buy

Start with the listing title: the watt figure printed there is the seller's stated continuous output. Then read the description for a surge figure, the battery type, and whether a panel or an extra battery is in the box. Finally, open the maker's page for the model and read what the maker lists, including any power lifting feature name.

The site's guides read the same details across many models and compare them on stated details only. Build a shortlist of two or three candidates and read each listing the same way. The article on reading a power station spec sheet walks through the rest of the listing terms.

What to pick for your situation

Questions

What does the watt figure in a power station title mean?

It is the seller's stated continuous AC output in watts: the power the AC outlets can supply on an ongoing basis. A surge or peak figure, when printed, covers a brief startup draw. Read the listing and the maker's page for the full description.

Is continuous output or surge more important for sizing?

Continuous output is the number to compare for ongoing use. Surge and peak figures are short-term and cover startup moments. If a listing prints both, read both, and check the maker's page for how the maker describes its surge feature.

Are output watts and capacity watt-hours the same?

No. Watts measure the rate of power flow, while watt-hours measure stored energy. An inverter size question is a watts question; capacity is a separate figure on the same listing.

Why doesn't the site say which appliances a station will run?

A listing's stated details do not include runtime or appliance support figures. The guides compare continuous output, capacity, battery type, and bundle contents, and they point you to the maker's page for what a model supports.

What is a power lifting feature on a listing?

It is a maker's name for a mode that allows a higher draw for a short time. Read the maker's description on its page; the continuous output figure remains the main number for sizing.