Tesla puts $10.1 billion and a 2029 date on solar cells, then asks Texas for the tax break

Tesla has applied to build a solar cell manufacturing plant in Texas under the project name Project Crystal Sun, with a stated investment of $10.1 billion, according to Teslarati as reported by Seoul Economic Daily ^[1][2]. It matters because the filing attaches a date to Tesla's move into cell production, first-quarter 2029 mass production, and because the money attached to the ask is a 10-year property tax break rather than anything raised from a market ^[3][4].

The stack is now large. Terafab, the semiconductor project, is reported to require at least $16.8 billion in its early stage, which puts roughly $26.9 billion of announced manufacturing capex alongside the solar plan ^[5][1]. The report says the solar business is expected to draw investment from both Tesla and SpaceX ^[6]. SpaceX, on a conference call, said it spent $15.8 billion on AI-related capital expenditure in the second quarter alone, about 1.6 times the entire stated cost of the solar plant ^[7][2]. Against that run rate, a property tax abatement is not the financing. It is a reduction in the carrying cost of an asset that still has to be paid for out of cash flow generated somewhere else.

The application's operating numbers are the part worth keeping. Tesla expects 9,712 permanent workers once the plant is fully operational, plus up to 1,147 construction jobs through 2028 ^[8][9]. That is about $1.04 million of stated capital per permanent job, a ratio that sits closer to assembly than to a wafer fab ^[3]. Incentive applications are written against a scoring formula, and 9,712 is the figure any abatement agreement will be measured against later.

Location is not settled. The proposed site is a suburban area roughly 40 minutes from Houston, but Tesla has not finalised it and the application also names an unnamed alternative site outside Texas ^[10][11]. Seoul Economic Daily describes this as standard practice in the United States, where companies compare incentives across states before committing, and notes that Tesla could go elsewhere if what Texas offers falls short of the request ^[12].

The demand-side case arrived separately. On the 6th, President Trump signed a proclamation aimed at China imposing a 15% tariff on foreign-made polysilicon derivatives and setting minimum import prices, so that from December 4 polysilicon cannot enter below $21 per kilogram, ingots and wafers below $100 per kilogram, cells below $0.22 per watt, and modules below $0.38 per watt ^[13][14]. That is a $0.16 per watt gap between the cell floor and the module floor, and it is the reason a domestic cell line can be underwritten at all ^[4].

The stated end use is not rooftops. Musk told the World Economic Forum in Davos earlier this year that building AI data centres in space was an obvious choice, that space would be the lowest-cost place to put AI, and that it would happen within three years at most ^[15]. Those designs run on solar power and shed heat by radiative cooling rather than water ^[16]. First-quarter 2029 output lands at the far edge of that three-year window ^[5].

Watch three things: whether Texas grants the abatement and at what job floor, whether the Houston-area site or the out-of-state option wins, and how Project Crystal Sun relates to the 10-gigawatt SpaceX cell plant in Bastrop County that Bloomberg reported in May, which this report does not reconcile with the new filing ^[17].