WattWise Tools

RunTime

How long a Jackery, EcoFlow, BLUETTI, Anker, or any other portable power station can hold a load. Usable watt-hours are the published capacity times an efficiency. Runtime is that number divided by watts. It is a plan, not a measurement of your battery tonight.

Power stationPicking a model fills the published watt-hours. You can still type over them.Battery capacity, WhLoad

Load, wattsPath

Efficiency, percent85% is a planning assumption, the same one the PC UPS tool uses. These station pages do not publish an inverter efficiency.

The Americas user guide lists typical power consumption of 56.1 W (111.5 VA) and peak power consumption of 73.2 W (137.6 VA) for the 65 W power supply section. RunTime uses the typical figure. The station's 12 V car port is not a substitute for ResMed's 24 V supply.

EcoFlow's Australia product page lists 1024 Wh, written as 85 Ah at 12 V, and four AC outlets at 1800 W total with a 2700 W surge. X-Boost, up to 2400 W on that page, is a separate overload mode. RunTime uses 1800 W as the continuous AC limit.

Estimated runtime

15 hr 31 min

Usable energy is 1,024 Wh times 85%, which is 870.4 Wh. Divided by 56.1 W, that is the runtime above.

This is a planning estimate, not a lab measurement. Real runtime moves with temperature, battery age, the inverter you actually have, and loads that cycle. A fridge compressor is the usual example: the nameplate running watts are not the same as the all-day average, and the startup spike is a separate check against the surge figure.

A PC UPS is a different job. The UPS calculator sizes a backup for a computer, including VA.

Estimates only. Use at your own risk.

6 stations and 4 loads are in the library, each with a source.Browse stations · Read the load notes · How to read the label