I use the EVSE that comes with the car, and I installed a 20A circuit, but that doesn't mean you have to. Any 110V circuit you come across will be 15 amps at least, but 20A is common. In your case, the worst thing that can happen is a thrown breaker, which could happen if there are too many light bulbs on the same circuit. Each bulb draws under 1 amp. I suggested the middle of night charging only because it minimizes the likelihood of someone else using the circuit, but it's also better for the car.