Depending on your billing cycle, call your utility provider well in advance of taking delivery of your Tesla to make sure you are on their TOU plan by the time you take delivery of your car and start charging at home. SoCal Edison is my electricity provider and I called them to switch over to their TOU plan about a week before we were going to take delivery of our MS 90D. Switching over is easy, however, the switch doesn't take effect until the next billing cycle so for your current billing cycle, you are still on your existing tiered billing. In my particular usage case, my non-EV monthly usage had me just breaking the tiered three rate at 29cents/kWh and my billing cycle was only a few days in when I called to make the switch so my first partial month of EV charging was all on my existing tier three rate of 29 cents/kWh vs the TOU rate of 13 cents/kWh. Granted, it is only for the first month but a little advanced planning could save you $100 easily.