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Know exactly how long your power lasts.
Power station runtime, battery, inverter and solar calculators for the next outage. Honest numbers from real appliance data, including whether your station can start a fridge or pump.
Runtime calculator
85% efficiency1,024 Wh
What's plugged in
Estimated runtime · 108 W average load
8 h 4 min
Six tools. One outage plan.
- 01hrsPower Station Runtime CalculatorHow long a power station will run your appliances, and whether it can start them.Open →
- 02fitPower Station Size CalculatorList what you need to run and for how long, and see which power stations can do it.Open →
- 03WhBattery Size CalculatorWh and Ah you need for a DIY, RV or off-grid battery bank, and how many batteries.Open →
- 04WInverter Size CalculatorContinuous and surge watts for your loads, with a recommended inverter size.Open →
- 05h☀Solar Recharge Time CalculatorHow many hours of sun your panels need to refill a power station or battery.Open →
- 06WAppliance Wattage ChartRunning watts, startup surge and real average use for 47 common appliances.Open →
Appliance wattage chart
Typical running watts for common household devices. Fridges and freezers average far less over a day, because their compressors switch on and off. Check the label on yours for exact figures.
See all 47 appliances →Refrigerator
150 W
TV, 55" LED
90 W
Laptop
50 W
CPAP machine
35 W
Wi-Fi router
12 W
LED light bulb
9 W
Guides
Straight answers with the math shown, one question at a time.
- 01What size power station do I need?
- 02How to calculate power station runtime
- 03How many solar panels do I need to charge a power station?
- 04Power station vs generator: which is better for backup power?
- 05How long will a power station run a refrigerator?
- 06How long will a power station run a CPAP?
- 07How long will a power station run a Wi-Fi router and modem?
- 08How long will a power station run Starlink?
- 09How long will a power station run a sump pump?
- 10How long will a power station run a chest freezer?
- 11How long will a power station run a mini fridge?
- 12Can a power station run a gas furnace?
- 13How long will a power station run an electric blanket?
- 14How long will a power station run a window air conditioner?
- 15How long will a power station run a space heater?
- 16Can a power station run a microwave?
- 17Can a power station run a coffee maker?
- 18Can a power station run a well pump?
- 19How long will a power station run a laptop or computer?
- 20How long will a power station run a TV?
- 21How long will a power station run an oxygen concentrator?
Runtime by power station model
31 models from Anker, Bluetti, EcoFlow, Jackery, each with runtimes for 47 appliances.
- Anker SOLIX C800 Plus768 Wh
- Anker SOLIX C1000 Gen 21,024 Wh
- Anker SOLIX C10001,056 Wh
- Anker SOLIX F2000 (767)2,048 Wh
- Anker SOLIX F38003,840 Wh
- Bluetti AC70768 Wh
- Bluetti Elite 100 V21,024 Wh
- Bluetti AC1801,152 Wh
- Bluetti AC200L2,048 Wh
- Bluetti Elite 200 V22,074 Wh
- EcoFlow River 3245 Wh
- EcoFlow River 2256 Wh
- EcoFlow River 3 Plus286 Wh
- EcoFlow River 2 Pro768 Wh
- EcoFlow Delta 21,024 Wh
- EcoFlow Delta 31,024 Wh
- EcoFlow Delta 3 Plus1,024 Wh
- EcoFlow Delta 2 Max2,048 Wh
- EcoFlow Delta 3 Max2,048 Wh
- EcoFlow Delta Pro3,600 Wh
- EcoFlow Delta Pro 34,096 Wh
- Jackery Explorer 240 v2256 Wh
- Jackery Explorer 300 Plus288 Wh
- Jackery Explorer 600 v2640 Wh
- Jackery Explorer 1000 v21,070 Wh
- Jackery Explorer 1000 Plus1,264 Wh
- Jackery Explorer 1500 v21,536 Wh
- Jackery Explorer 2000 v22,042 Wh
- Jackery Explorer 2000 Plus2,042 Wh
- Jackery Explorer 3000 v23,072 Wh
- Jackery Explorer 5000 Plus5,040 Wh
How our estimates work
Every calculator uses the same open method, explained in how to calculate power station runtime:
- Average watts, not label watts. Fridges, freezers and pumps switch on and off. We use their average draw, which is what actually drains a battery.
- Real-world losses. AC outlets deliver about 85% of a station's rated capacity, DC and USB about 90%.
- Startup surge checks. Motors draw a spike when they start. We warn you when a station is likely to trip.
Typical figures for 47 appliances are in the appliance wattage chart. Your own appliance label or a plug-in watt meter will always be more accurate, and you can type your own numbers into any calculator.
Frequently asked questions
How do I calculate how long a power station will last?
Multiply the station's capacity in watt-hours by about 0.85 for AC outlets (0.9 for DC or USB) to allow for conversion losses, then divide by the average watts of everything plugged in. A 1,000 Wh station running a 60 W average load lasts roughly 1,000 × 0.85 ÷ 60 ≈ 14 hours.
Why does my power station run for less time than its capacity suggests?
The inverter that turns battery power into AC loses around 10–15% as heat, and the battery management system keeps a small reserve. Cold weather reduces usable capacity further. That's why we never assume 100% of the rated watt-hours are available.
Can a power station run a refrigerator?
Most stations rated 1,000 W or more can, as long as their surge rating covers the compressor's startup spike, which can reach 1,000 W or more. A typical fridge averages 40–90 W, so a 1,000 Wh station keeps it going for roughly 10–20 hours.
What's the difference between running watts and surge watts?
Running watts are what an appliance draws while operating. Surge watts are the brief spike when a motor or compressor starts. A power station's continuous rating must cover the total running watts, and its surge rating must cover the largest startup spike.
Are these calculators free?
Yes. Every calculator is free, runs in your browser and needs no signup or email.