A1: Yes, you can charge 1/3rd faster at 120V and 12 amps versus 120V and 8 amps provided you have a dedicated 15 amp circuit or a 20 amp circuit. The 12 amp setting results in the maximum allowable load (1440W) on a 15 amp circuit so no other devices can be in use on the circuit when charging.Two questions re: 2018 Volt. 1. Any benefit to charging with 120 VAC @12A setting. Faster than 8A? Also does car have WIFI hotspot?