WeekendCalc

How Long Will a 2,000Wh Power Station Last?

A 2,000 Wh power station has about 1,700 Wh of usable energy. That runs a refrigerator for roughly 28.3 h, a laptop for 28.3 h and a CPAP for 42.5 h. Enter your own device below.

Your project

Wh
%

About 85% for power stations (inverter losses), about 50% for lead-acid batteries, and 80 to 90% for lithium (LiFePO4) batteries.

W

The watts of the device. Check its label, or use a plug-in watt meter.

Results

Runtime
17.0 hours
17 h 0 min
In days
0.71 days
Usable energy
1,700 Wh
Total capacity
2,000 Wh
  • Runtime = usable watt-hours ÷ watts. Devices that cycle (refrigerators, pumps, heaters with thermostats) use less than their label rating on average, so real runtime is longer. Cold weather reduces battery capacity.

Runtime of a 2,000 Wh power station, by device

At 85% usable capacity (1,700 Wh), without recharging. Real runtime depends on the actual draw of your device, which you can measure with a plug-in watt meter.

DeviceTypical wattsRuntime
LED light bulb9 W189 h
Phone charger15 W113 h
Wi-Fi router and modem15 W113 h
CPAP machine40 W42.5 h
Mini fridge (average)30 W56.7 h
Full-size refrigerator (average)60 W28.3 h
Laptop60 W28.3 h
Box fan50 W34.0 h
LED TV100 W17.0 h
Desktop computer200 W8.5 h
Microwave1,000 W1.7 h
Coffee maker1,000 W1.7 h
Space heater1,500 W1.1 h

Is 2,000 Wh enough?

This is a large unit that can run a refrigerator and essentials for a day or more, with care. Heating and cooking appliances still drain it fast. For a full plan, see the power station sizing guide, and the size calculator to work out your own daily energy.

Want to change anything else? The calculator above is the full Battery & Power Station Runtime Calculator: edit any number and the results update instantly.

Tools & materials for this project

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Plug-in watt meterPortable power station (1,000 Wh)Deep cycle battery (100 Ah)InverterFoldable solar panel

Frequently asked questions

How long will a 2,000Wh power station run a refrigerator?

A full-size fridge averages about 60 W over a day, so 2,000 Wh (1,700 Wh usable) runs it for roughly 28.3 h. Older or larger fridges use more, so the time can be shorter.

How many times will a 2,000Wh power station charge a phone?

About 113 full charges, at about 15 Wh of battery per phone, before losses in charging.

How long will a 2,000Wh power station run a CPAP?

About 42.5 h at 40 W, which is 5.3 nights of 8 hours. Using the humidifier raises the draw.

Related sizes and guides

1,000 Wh power stationRuns a 100 W load for 8.5 h1,500 Wh power stationRuns a 100 W load for 12.8 h2,500 Wh power stationRuns a 100 W load for 21.3 h3,000 Wh power stationRuns a 100 W load for 25.5 hPower station sizing guideGuideGenerator Size CalculatorThe gas alternative

Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.