The best car charger is going to be the one that can charge your specific vehicle with the most efficiency. Some car chargers like Tesla have options to load shed and share the same circuit with two different chargers. It's important to think about what your future expansion plans might be when installing the electrical power for your new EV charger. Eventually, most vehicles in the United States will be electrically powered. The EV charger that works best for you might need load shedding and sharing capability. Also, an important consideration will be how fast you'll want the charger to charge your vehicle. The speed at which your vehicle will charge depends on the power requirements of the model you select and how it is engineered with its compatibility with your vehicle. The charging speed is rated in miles of charge per hour and can range from 10 to over 100mph.