during the summer & fall last year, both TXU and Reliant (my current provider) had plans with 'free' or discounted electricity for nights and weekends. I don't remember the exact details, but I think Reliant was discounted by a whole 1c from 10pm - 6am, and during the rest of the day was about 4c higher than their other plans, so, it sucked. The TXU was more interesting, as that was free overnight, and around 12c during the day. With the model S charging, and a few other reasonable high loads (washing m/c, dryer, dishwasher, some AC, pool pump), I think I could have switched things up to benefit from the plan. however, TXU no longer offer than plan it seems, and from what I can find on Power to Choose, there's nothing else 'optimized' for overnight charging, unless any of you guys know different?? Oncor is my PoCo, if that makes a difference, and I do have a smart meter.