We expect gross margin for Model 3 to remain stable in Q4 as manufacturing efficiencies and fixed cost absorption offset a slightly lower trim mix and the negative impact of tariffs from Chinese sourced components. Gross margin for Model S and X will likely decline slightly in Q4, as we expect that the sequential increase in tariffs in Q4 from Chinese sourced components will be only partially offset by increased manufacturing cost efficiencies. For all three vehicles, additional tariffs in Q4 on parts sourced from China will impact our gross profit negatively by roughly $50 million
Energy generation and storage revenue should decline slightly in Q4 compared to Q3, mainly due to seasonality of the solar business. As a result of lower solar mix and seasonality, gross margin of this segment should also decline slightly in Q4. We expect our Services and Other business to continue to grow mainly due to used car sales volumes. Gross margin of this segment should see further sequential improvement. We will increase investment in our service infrastructure in North America through deployment of new service locations and additional mobile service vehicles.