Most efficient/best way to power a 4060 gaming laptop (~115w max draw) in a 2nd/3rd gen Prius?

I've read that some people don't recommend the $20-40 12v cigarette inverters for something pulling above 120w, but would 115w be cutting it too close? From my understanding a 12v dc USB-C cigarette charger would be ideal but apparently 4060 laptops via USB-C port will cap out at 65w from those chargers so if I was using more than 65w while gaming it would be losing charge.