u003cstrongu003eA:u003c/strongu003e Depending on what you’re powering and the power level at which you run your portable inverter generator, you can expect it to run continuously on a single fuel source for between 6 and 18 hours. If you have a solar-powered portable inverter generator, you can often get 6-24 hours of runtime, again depending on how many devices you have drawing power from it.