On the OpEx side, they guided 20% higher in H2 compared to H1. H1 had on average 434M per quarter. So, we're looking at 521M OpEx here. Then there's another ~40-50M of interest loss. So Tesla needs ~565M in gross profit to break even.
Last two quarters had 336.5M in gross profit on average. Adding your optimistic case of 150M, that's 486.5M, still missing 80M for break even. Under your assumption, they need 9000 more cars or 24k to break even non-GAAP in Q3.
And I don't think they can achieve 22% GM in Q3. Low margin 60 is in Q3 while high margin 100 is not. They have been doing just a little over 20% on GM in the past 3 quarters and I don't see it can increase to 22% with a shift towards lower margin cars, even considering they may have improvements on COGS. ASP will be lower too. And then you throw in all the promotions we're seeing, I would say using 20% as overall GM and ASP of 90k may be more realistic. So, in the 6000 additional car situation, it will bring in 108M of gross profit. At 21k cars gross profit is 378M, resulting in a 187M loss. To break even, they need 31k delivered, which is impossible. Even if I am more generous and optimistic to go with 22% GM and 95k ASP, that's 27k deliveries required.
So all in all, I don't think there's a reason to get any hope of non-GAAP profitability in Q3. It's not even an illusion.