The point here is the take advantage of leveraged money at a fixed 0.99% , in a high risk inflationary time period. The bank (tesla) is getting eaten alive on this 10 year-fixed-rate loan. One would be beyond insane to pay any more than the bare minimum towards the down payment, or actively work to pay extra on the principal.
I received the credit approved green check mark and have received permit approval - though I am still going through a small panel re-design. The PA mentioned that since we already have permits for the install, then can simply install as I want, and then re-permit prior to PTO (eek).
I am sure they can do that ( re permit ), just be aware that is going to make your time between install and PTO take "some indeterminate amount of time" longer. "Eyes wide open" as the saying goes.