I leased a 6.25 kW system from Tesla 4 years ago to support my Tesla. I have added a second Tesla and am looking to upgrade my system by 4.1 kW. I am also wanting to add 1-2 PW's. Tesla seems to be promoting just 1 PW. I'm thinking 2 makes more sense, as we have been spending 5 months a year in another home in AZ, and will likely sell that place later this year. I am needing help in sizing my system needs as Tesla hasn't been terribly informative. Thanks.