Runtime Calculator
Select a power station, add the devices you want to run, and estimate runtime based on usable capacity and inverter efficiency.
Power station
Devices
No devices added yet
Inverter efficiency
DC → AC conversion loss. 85% is a safe default.
Estimated runtime
Your estimate will show here
Add at least one device on the left. We combine its draw with your station's capacity and efficiency.
Using EcoFlow DELTA Pro Ultra (6.1kWh, 7.2kW output).
When you're happy with your estimate, compare prices for EcoFlow DELTA Pro Ultra.
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How runtime is calculated
Formula: (Capacity × Efficiency) ÷ Total Watts = Hours. Default 85% efficiency reflects real-world DC-to-AC conversion losses — LiFePO4 batteries often hit 90%+. Device wattage can vary: a mini fridge cycles on and off, so its average draw is much lower than its rated watts. Temperature, battery age, and load mix also affect real-world runtime.
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