During night time charging i almost always get 64amps sustained for as long as i need to charge (HPWC dip switches set to 64) but during the day if i flick a few things on like computer and lots of lights and/or run the AC in the house, it'll sometimes drop to 48amps and the car will display this warning on the dashboard: "Charge speed reduced -- Ext. Cord used or Bad Wiring". Question is, for added safety should i just set the DiP switches to 48 permanently or can i safely rely on the tesla charging system to monitor for what i assume is a voltage sag on the incoming electrical(?) and drop the amps itself? Alternately, could i go up to 80 amps and let the system take care of itself? For what it's worth the fuses and wiring from the garage breaker box that feeds the HPWC is all rated for 100amps, but the breaker panel itself shares a 100amp line from the main house with a few other things connected, which is the reason i conservatively set the 64amp limit in the first place.