Your EIA source is for generation in the month of august only. Total solar generation in Arizona is much higher than that. Very roughy 1,500x nameplate capacity = total annual generation in Arizona. 5,600 mw capacity in 2021, 8,400,000 mwh annual generation.
All fabs have battery backup regardless of power source, although with solar you would need a much larger one indeed. Either way, the scale of solar power generation easily supports these new fabs.
So all power infrastructure would be less than 5% of the cost of the plant, and that’s overbuilding solar needs by 4x (meaning even on the crappiest day power wise you’ll have more than enough) and having 16 hours of backup power which is also overkill.
https://en.wikipedia.org/wiki/Solar_power_in_Arizona
All fabs have battery backup regardless of power source, although with solar you would need a much larger one indeed. Either way, the scale of solar power generation easily supports these new fabs.
https://www.eia.gov/electricity/generatorcosts/ Cost is ~1,65B per GW of solar. 30% subsidy from government = ~1.1B per GW to generate ~ 1,500,000 mwh. They’re dirt cheap. Unfortunately battery storage, while it exists at this level, is more in the range of 800M to be safe (1600 mwh of storage). https://www.tesla.com/megapack/design
So all power infrastructure would be less than 5% of the cost of the plant, and that’s overbuilding solar needs by 4x (meaning even on the crappiest day power wise you’ll have more than enough) and having 16 hours of backup power which is also overkill.