! Power Station Runtime Calculator

Portable Power Station Calculator: Find Your Runtime

Estimate how long a portable power station will run your camping gear, fridge, CPAP, laptop, lights, and backup essentials.

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Power Station Runtime Calculator

Choose a model, pick your devices, and get an instant runtime estimate.

1. Select Brand
2. Select Model
3. Select Appliance
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Estimated Runtime

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Check Price
—Capacity Wh
—Load W
85%Efficiency

How to Calculate Runtime

It is simple math. Think of your power station like a fuel tank.

  • Capacity Wh is how big your tank is.
  • Watts W is how fast your gear uses fuel.
  • Runtime is how long before empty.
The FormulaCapacity Wh / Watts x 0.85 = Hours

Why x 0.85? No battery gives you 100% of its stored power. About 15% is commonly lost as heat and conversion loss.

Real example:

You have a 1,070Wh Jackery-style station and a 60W laptop. 1,070 divided by 60 x 0.85 = about 15 hours.

Good to know: Laptop chargers marked 65W often pull less during normal use. The label is the maximum, not always the real draw.

Quick Runtime Chart

Use this as a quick reference for common campsite loads.

Power StationSizeMini FridgeCPAPLaptopTV
Jackery 300293Wh3.2 hrs8.5 hrs4.3 hrs2.6 hrs
Bluetti EB3A268Wh2.8 hrs7.6 hrs3.8 hrs2.3 hrs
Jackery 500518Wh5.5 hrs14.7 hrs7.3 hrs4.4 hrs
Anker C800768Wh8.2 hrs21.8 hrs10.9 hrs6.5 hrs
EcoFlow Delta 21024Wh10.9 hrs29 hrs14.5 hrs8.7 hrs
Bluetti AC1801152Wh12.2 hrs32.6 hrs16.3 hrs9.8 hrs
Jackery 2000 Plus2042Wh21.7 hrs57.9 hrs28.9 hrs17.4 hrs

How Many Watts Does Your Stuff Use?

These are planning numbers. Check your own device label when the trip depends on it.

DeviceWattsNotes
Phone charger5-20WFast chargers use more.
LED camping light5-15WVery efficient.
Laptop30-65WGaming laptops use more.
CPAP basic30-60WWithout humidifier.
Small fan20-50WGreat for camping.
Mini fridge60-90WCycles on and off.
Coffee maker800-1000WShort bursts, high output needed.
Microwave1000W+Needs a larger inverter.

What Size Portable Power Station Do I Need?

Use CaseGood Starting SizeNotes
Phones, lights, camera batteries200-300WhEasy weekend power.
Laptop, lights, fan500-700WhComfortable overnight setup.
CPAP for one night500-700WhAdd more for heated humidity.
Mini fridge for a day1000-1500WhSolar helps a lot.
Outage fridge backup2000Wh+Check startup surge.

Runtime Examples By Brand

At the same watt-hour capacity, brands last about the same. The big differences are output rating, charging speed, battery chemistry, app controls, and price.

BrandExample ModelsBest Use
JackeryExplorer 300, 1000 v2, 2000 PlusSimple camping and road trips.
EcoFlowRiver 2 Pro, Delta 2, Delta ProFast charging and app-friendly setups.
BluettiEB3A, AC70, AC180, AC200LValue-focused LiFePO4 backup.
Anker SOLIXC300, C800, C1000, F2000Clean home and camping crossover.

Portable Power Station FAQ

How long will a 1000Wh power station last?

With an 85% efficiency estimate, about 17 hours at 50W, 8.5 hours at 100W, or 4.25 hours at 200W.

Can a portable power station run a refrigerator?

Yes, if the station can handle both running wattage and startup surge. For full-day outages, 2000Wh or more is a better starting point.

Will this work for a CPAP machine?

Usually yes. A CPAP without heated humidification is a good power station load. Heated humidity requires more capacity.

How accurate is this calculator?

It is a planning estimate. Real runtime changes with temperature, device cycling, inverter losses, battery age, and how you use the device.

Real-World Examples

Weekend Camping

Phone charging, LED lanterns, a small fan, and a laptop can land around 250-600Wh for a weekend.

CPAP for 3 Nights

A basic CPAP at 30-60W often needs 750-1500Wh for a long weekend. Heated humidity needs more.

Power Outage

A home fridge can average 100-200W with startup spikes. For a full day, start around 2000Wh.

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