Our pick
Enough
Runs your list for hours
WhHow much it holds
WHow fast it gives
- 1 · Choose
- 2 · How long
- 3 · Your boxes
What do you want to keep on?
Tap everything you need. Watts: how fast something uses power.
Drag the plug to the socketPick at least one thing
Nothing picked yet.0 thing · about 0 watts0 things · about 0 watts
How long?
How long does the power stay out where you live? Pick one.
You need about 0 watts and 0 watt-hours.
Watts: how fast your things use power. Watt-hours: how much power the box must hold.
Estimates. Your devices may use more or less.
You need about 0 watts and 0 watt-hours.
Your list for 12 hours. Here are the boxes that fit.
Estimates. Your devices may use more or less. No prices here: they change every day.
Not enough
Nothing fits your list yet.
Your list needs about 0 watts and 0 watt-hours. The biggest box we trust gives 4,000 watts and holds 4,096 watt-hours. Some things on your list need a short burst to start: about watts. No box we trust gives that much.
Change your list or hours first.Now it fits. Go see your boxes.
Our biggest box
Estimates. Your devices may use more or less.
EcoFlow DELTA Pro 3 runs your list for hours. You asked for 12 hours.EcoFlow DELTA Pro 3 cannot power your whole list at once.
How Find My Power works
Find My Power is a free tool. It tells you what size power station your home needs when the power goes out. A power station is a big battery in a box, with outlets like the ones on your wall. You answer two questions. Then you see up to three boxes that fit.
Step 1. Pick what you want to keep on
Tap each thing you need, like a refrigerator, a Wi-Fi router or your phones. Each one shows a number in watts. Watts: how fast something uses power. The tool adds up the watts of everything on your list.
Some things say “heavy”. Heavy means the thing uses a lot of power, like a microwave, a space heater or a window AC. One heavy thing can use more power than all the small things put together. So a list with a heavy thing needs a much bigger box.
Step 2. Pick how long
Choose 4 hours, 12 hours, 24 hours or 3 days. Think about how long the power stays out where you live. More hours means the box has to hold more. Watt-hours: how much power a box holds.
Step 3. See your boxes
You see up to three boxes: the smallest one that is enough, one with some extra, and one with room to grow. Each card tells you how many hours that box runs your list. There are no prices here. Prices change every day, and Amazon shows the latest one.
The math in one line
watt-hours × 0.85 ÷ watts = hours
Why 0.85? A box loses some power when it turns battery power into wall power. So we count only 85% of what the maker says the box holds. Here is an example. A box holds 1,000 watt-hours. Your list uses 170 watts. 1,000 × 0.85 ÷ 170 = 5 hours.
What surge means
Surge: a short burst some things need to start. A refrigerator has a motor. For a moment, when the motor starts, it asks for much more power than when it is just running. If the box cannot give that burst, the box shuts off and the fridge does not start. So the tool checks three things: the watts while everything runs, the burst when the hardest thing on your list starts, and the watt-hours for the hours you picked. A box has to pass all three to show up.
The numbers we use
These are the watts the tool uses for each thing. Running watts is the power a thing uses while it is on. Start-up watts is the short burst it needs to start.
| Thing | Running watts | Start-up watts |
|---|---|---|
| Refrigerator SourceFridges differ a lot. Honda's generator guide lists 132 to 192 watts running and about 1,200 watts to start an ENERGY STAR fridge or freezer. Check the label inside your fridge. | 120 W | 1,200 W |
| Wi-Fi router SourceGoogle lists a 15-watt power adapter for its Nest Wifi router. The adapter number is the most a router can draw. If you also have a modem or a fiber box, count it too. | 15 W | 15 W |
| Phones SourceApple lists a 20-watt adapter for fast-charging some iPhones and 40 watts for others. Our tools count 20 watts for phones. Two phones charging at once can use more. | 20 W | 20 W |
| Lights Source40 watts is about four LED bulbs. ENERGY STAR says a certified LED gives the light of a 60-watt bulb with 75% to 90% less energy. One old-style bulb can use 40 to 60 watts by itself. | 40 W | 40 W |
| CPAP machine SourceResMed lists 7 watts for an AirSense 10 by itself, 22 with its humidifier and 34 with a heated tube. Its user guide lists 53 watts as typical and 104 at peak. Check your own machine's manual. | 40 W | 104 W |
| TV SourceIn the EPA's ENERGY STAR list, certified 55-inch TVs use about 64 to 114 watts when on, and 65-inch TVs about 85 to 135. Bigger and older TVs use more. Check your TV's label or manual. | 100 W | 100 W |
| Laptop SourceApple lists laptop power adapters from 20 to 140 watts, and several models use 67 or 70 watts. The adapter number is the most a laptop can draw. Check the label on your charger. | 65 W | 65 W |
| Fan SourceHonda's generator guide lists about 40 watts running and 120 watts to start a portable fan. Fans differ by size and speed. Check the label on your fan. | 50 W | 100 W |
| Microwave · heavy SourceThe number on a microwave is its cooking power. It pulls more from the wall: Honda's guide lists 1,000 watts for a 650-watt oven and 1,500 watts for a 1,000-watt oven. | 1,100 W | 1,500 W |
| Space heater · heavy SourceLasko lists 900-watt and 1,500-watt settings for one of its ceramic space heaters. Our tools count the high setting. A heater empties a power station fast. | 1,500 W | 1,500 W |
| Window AC · heavy SourceWindow units differ by size and age. By ENERGY STAR's rule a certified 10,000 BTU unit uses about 680 watts. Honda's guide lists 1,500 watts running and 2,200 to start for that size. | 900 W | 2,000 W |
| Sump pump · heavy SourceHonda's generator guide lists 800 watts running and 1,300 to start for a 1/3 horsepower sump pump, and 1,050 running and 2,150 to start for 1/2 horsepower. Check your pump's label. | 800 W | 2,200 W |
Estimates. Your devices may use more or less. The label on your own device has the real number.