Runtime Estimator

Multiply the power station capacity in watt-hours by 0.85 (to account for inverter efficiency loss), then divide by the device wattage. For example, a 1,000Wh station running a 100W TV: 1,000 x 0.85 / 100 = 8.5 hours of estimated runtime.

When a power station converts stored DC battery power to AC power for your appliances, the inverter loses about 10-15% of the energy as heat. This is called inverter efficiency loss and is inherent to all power stations with AC outlets. DC-powered devices (USB, 12V car port) bypass the inverter and get closer to the full rated capacity.

The power station's overload protection will trip, shutting off the AC output to protect the unit. For example, a 1,500W space heater cannot run on a power station with only 1,000W of continuous AC output. Always check both the continuous and surge wattage ratings before connecting high-draw appliances.

No. Fridges, freezers, and air conditioners cycle on and off via a compressor. A fridge rated at 150W might average only 40-60W over time because the compressor only runs periodically. Real-world runtime with cycling appliances is often 2-3x longer than the rated wattage suggests. Our calculator uses the rated wattage for a conservative estimate.

Yes, as long as the combined wattage of all devices does not exceed the power station's continuous output rating. Add up the wattages of all devices you want to run simultaneously and compare to the max AC output. Use our Power Station Calculator to estimate combined runtime with multiple devices.