First, for those talking about the Model 3 fuses, you are incorrect. The Model 3 doesn't have fuses. Just protective MOSFETS controlled by the computer.
What's the most efficient way to charge, that's a slightly dubious question.
What's the easiest way? A USB Type A to USB C cable.
What's the way to get the most current? You need to find a high current USB C 12V adaptor.
If you are talking about an Apple, that's probably your options. Other manufacturers often can use both USB C and their standard solution. And if they have a 12V adapter for their standard solution, that's probably the best.