We are excited about 2017, as we expect to see significant advances across our transport, energy generation and storage product lines. Most notably, the Model 3 and solar roof launches are on track for the second half of the year. However, since even a couple-week shift in timing could have a meaningful impact on total deliveries and installs, we are focusing our guidance on the first half of the year.
We expect to deliver 47,000 to 50,000 Model S and Model X vehicles
combined in the first half of 2017, representing vehicle delivery growth of 61% to 71% compared with the same period last year. In addition, both GAAP and non-GAAP automotive gross margin should recover in Q1 to Q3 2016 levels and then continue to expand in Q2 2017.