Enter your devices to calculate the Wh capacity you need.
Select your appliances above to calculate your autonomy needs.
A portable power station's runtime depends on the ratio between its capacity (in Wh) and the consumption of the connected devices. The calculator adds up each device's power multiplied by its usage time, then applies a safety margin for inverter efficiency and losses.
Not all Wh are equal: a station is never usable at 100% of its capacity, and high-power devices (kettle, heater) drain a battery far faster than LED lighting. The consumption ranking helps you spot the hungriest loads.
The result gives your estimated runtime and, where relevant, the recommended station to cover your needs without running out at the wrong moment.
Add your devices
Select the equipment to power and set its daily usage time.
Check the breakdown
The donut chart shows which devices consume the most energy.
Read the total need
The calculator shows daily consumption in Wh, including the safety margin.
Compare with a station
Match your need against station capacities to pick the right model.
Multiply the device's power (W) by its usage time (h). A 100 W device for 3 h uses 300 Wh.
The inverter is 85-90% efficient and usable capacity is below the nominal rating. A safety margin covers this gap.
Heating resistances (kettle, hair dryer, heater) consume huge amounts and drain a small battery in minutes.
Reduce power-hungry devices, add a solar panel to recharge during the day, or choose a higher-capacity station.
