Cost of installing of the TE products is not included in the $470/kWh list price shown on their website, so whatever it is, it will not have any effect on the GM. The $470/kWh includes only batteries, so the pricing and GM on inverters, does not factor in my calculation as well. The 50% GM on TE that was included in my calculation stands given the published data.
Regarding the stores, there will be no need to have 441 stores until the very end of 2017 when Model 3 will start shipping in quantities and a sizable dent is made in the quantity of reservations on the books (backlog), so expansion of stores in conjunction with Model 3 ramp will have zero effect on Q1, Q2, Q3 and most (if any) of Q4 2017. On top of this expansion in stores does not mean proportional increase of the SG&A. From 215 in March Tesla grew their store presence to
260 now, a 20% increase, with SG&A expenses, as addressed by Jason Wheeler during the ER call, and shown in the shareholder's letter financial summary, staying flat.
Regarding the CapEx, as was addressed before, absolute majority of them are included in COGS, not OpEx, so will not affect the GM.
I do not believe that your concern about Tesla not being non-GAAP profitable in 2017 is valid. Tesla is very likely to bring about $1B of non-GAAP profit in 2017, as shown in my
napkin math example.