OK, production side, that I follow pretty carefully.
They really do believe that they've got everything going at 7K/week, and I do think the earnings release indicated that they were actually targeting higher numbers for the future. ("All manufacturing equipment in Fremont has demonstrated capability of a 7,000 Model 3 vehicles per week run rate, which we continue to work to increase.")
There don't seem to be major plans for downtime on the Model 3 lines in Q3. If they've actually reached 6500/week, that's 84500 production; even with some building up of the pipeline, deliveries should be in the 80K range. If you instead assume 2 weeks downtime (likely excessive for Q3) and 7K rate when operating, you get 77K.
So I actually do believe your 78K number for model 3, and I think it is likely to be low.
I think your S/X number is also too low. I'm expecting circa 18000.
I think your GMs are too high, though. I'd stick with same margins as Q2 on 3 and S/X. Service gross margin *needs* to drop in order to provide reasonable service.
Storage is kind of hard to calculate (we have no clear insight on the gross margins due to mixing it with solar sales & leases), but it is showing massive QoQ growth rates, and your model suggests that Q3 will be the same as Q2. With battery cell restrictions being removed, I don't see why this would be the case. I would make a WAG that they'll actually be up to 300000 in revenue rather than your 257000
OK. Could you try assuming higher Model 3 production, higher Storage sales, and lower GMs?
If I assume 15% GM on Model S/X but also assume 18K cars, this raises profit by 13350.
If I assume 18.7% GM on Model 3 but also assume 80K cars, this lowers profit by 32128.
If I assume 300000 revenue on Storage and stick with your 11% GM assumption, which seems plausible at that scale, this raises profit by 4678.50.
So I guess my model looks even worse than yours.
The key issue seems to be the GM on Model 3, which makes sense. To make up for the GM staying at 18.7% Tesla would have to push out about 5500 more cars than in your model, or about 84K Model 3s. To further reach non-GAAP profitability (still assuming GM of 18.7%), they'd have to push out an additional 3000, or about 87K Model 3s (actually 86414 based on this model, but that's excess precision).
Now, that's about 6648/week. Or 7000/week with 4 days downtime. Given what I've heard... I actually think this is possible in Q3. But it's also quite possible that they'll miss the target.
It's an economies of scale business, so it's all about the volume. Either way, Q3 will have substantial positive free cash flow. Depreciation & amortization is now over $500 million per quarter, capex is under $250 million per quarter (and it was emphasized that that is sustainable), so free cash flow is running $250 million ahead of non-GAAP profit, structurally (before timing effects like inventory and accounts payable/receivable).
So they are, as they said, self-funding. They also have the cash to pay off the November 2019 bond from two quarters' free cash flow, without inventory shenanigans. They have enough cash from the stock & bond issuance to easily pay off all the non-recourse debt which comes due this year, too, and still have working cash.
TLDR: They are structurally free cash flow positive by at least $200 million/quarter. To reach non-GAAP profit they need 87K Model 3s in Q3; we'll see in early September! Higher GM would of course improve matters.
P.S. For GAAP profit, however, due to the goofy stock-based-compensation accounting, they'd need 109K Model 3s in a quarter, which seems impossible.