The Prius has an accessible 12V outlet on the passenger below the dash, and another in a not too bad spot in the center console. For several years I've used an inverter similar to the one shown without a USB connection without any issues. FWIW for dedicated 'car' devices I tend to also purchase dedicated 12V inverters so they can be powered and charged as we go along - such as a Garmin GPS and another for my Yaesu HT. Plug them in and mostly forget about them.