Free calculator, no sign-up

The next outage is coming. Know exactly what will keep running.

Tap what matters to your household. We size the battery you need and show only the power stations that can carry it, with runtime for your list instead of a spec sheet.

  • Runtime math you can check yourself
  • Rankings are never for sale
  • Amazon and direct prices, side by side

What needs to stay on?

0 items

For how long?

Battery you need0.0kWh
Peak power, with startup surge0W

Pick what matters to see your size.

See what fits

Estimates use typical wattages. The label on your appliance has the exact number.

Power stations that can carry your list

Prices change daily, so the buttons show today's price at the retailer. We may earn a commission from these links. It never changes which products fit your list.

Free printable checklists

Stick them on the fridge. Hand one to the babysitter. All free, no sign-up.

Emergency supplies

For houses and apartments.

Free PDF

Food safety

What to keep, what to toss.

Free PDF

Family plan

Contacts and meeting places.

Free PDF

72-hour plan

The first night through day 3.

Free PDF

How we pick

We run real loads

Refrigerators, routers and CPAP machines on a watt meter until the battery quits. [ADD: number of units tested]

We publish the fine print

Surge limits, fan noise and real recharge times: the things spec sheets leave out.

Rankings aren’t for sale

Brands can’t pay for placement. Commissions keep the site running; they don’t decide what fits.

Your first runtime test video goes here. Click this box, delete it, and add a YouTube block with your video link.

We unplug the house so you don’t have to guess.

Every recommendation traces back to a test you can watch start to finish.

Before you buy

Why a battery instead of a gas generator?

A power station runs silently indoors, with no exhaust and no fuel to store. A gas generator delivers more power for longer, but it must run outdoors, well away from windows and doors, because its exhaust contains carbon monoxide. Many households use a battery for essentials and keep a generator for big loads.

Will it really run my refrigerator?

Most fridges draw modest power while running but spike briefly when the compressor starts. The calculator includes that startup surge, so every match can handle it. For exact numbers, check the label inside your fridge.

Do I need an electrician?

Not for plugging appliances straight into the unit. Powering your home’s circuits requires a transfer switch installed by a licensed electrician. Never connect any power source to a wall outlet to back-feed your house.

Why show both Amazon and the brand’s own store?

Prices, bundles and return policies differ, and each changes often. We show both so you can pick the better deal on the day you buy.