I started the process of ordering a solar purchase from Tesla. After running the numbers as well as seeing other offers it appears that I need to get a system around 4.25 kWh. The small option from Tesla is 3.78. I’ve asked if I can add a few more panels I’m at 12 - would like to get to 14) or use the higher wattage panels (they offered me 315 watt panels and not the 330 Panasonic panels). I was told that these are fixed systems and I can’t make any changes. Has anyone else heard of this?