I'm in Phoenix as an APS customer, working on having the 11.4kw system designed and installed on my house. One of the documents I had to sign was a recommendation for rate plan change to the Saver Choice plan that has higher on and off peak rates as well as a grid access charge, but removes the "unpredictable" demand charge. I'm currently on the Saver Choice Max plan. Until yesterday I hadn't taken the time to understand what a demand charge was, but after reading up I'm fairly confident that I can manage on-peak demand (with or without solar) to reduce the demand charge as much as possible. Question then, as long as I can manage the on-peak demand, is there any other reason to change plans? Here's what I have (Saver Choice Max): On-peak: .08683 summer / .0656 winter per kwh Off-peak: .0523 per kwh Super off-peak: N/A Grid access charge: N/A Demand charge: 17.438 summer / 12.239 winter per kw Here's what Tesla recommends (Saver Choice): On-peak: .24314 summer / .23068 winter per kwh Off-peak: .10873 per kwh Super off-peak: .03200 winter per kwh Grid access charge: .93 per kw-dc Demand charge: N/A Peak time is 3pm-8pm M-F. The daily basic service charge (.427) and excess production buy rates (.1161) appear to be the same regardless of which plan I'm on, so I left them out. Also, FWIW, about 85-90% of my usage is currently off-peak. My demand charge last month was based on 9.2kw (had A/C and pool pump on at the same time one afternoon), but I'm making some changes here that should prevent this in the future. Between the higher rates and grid access charge, the recommended plan actually seems much worse to me. What am I missing? Do they just make the assumption that people can't effectively manage the demand charge?