I have a L6-20 outlet in my garage so I was using my UMC to charge with that. The only problem is that it only charges at 240v 16 amps on the 20 amp circuit. Last night I installed a Tesla hpwc on a 40 amp circuit so it charges at 240v 32 amps. However, when I charged this morning, it seems only slightly faster. On 240v 16 amps, it said that I can charge at 10 miles/hr. On 240v 32 amps, it says that I can charge at 12 miles/hr so the time savings is not much. Does this sound right?