$1/watt is the current price for modules and installation, etc. can bring it up to $2-3, but for a large-scale installation of this size I would expect that you

$1/watt is the current price for modules and installation, etc. can bring it up to $2-3, but for a large-scale installation of this size I would expect that you could get a discount on the panels and the total cost could be under $2 although I was not able to find any current figures for the going rate Arizona. What I might be more concerned about is that their agreement to sell power is only for two years. Without storage, they may have a hard time getting good prices for mid-day power in the near future. Edit: Probably $1.50/watt for utility scale: https://pv-magazine-usa.com/2016/09/29/nrel-u-s-utility-scale-solar-costs-fell-below-1-50-per-watt-in-q1-2016-with-charts/ https://pv-magazine-usa.com/2016/09/29/nrel-u-s-utility-scal...