Industrial-scale solar arrays are now competitive without any government subsidies, tax breaks, rebates, or other incentives.

Without any subsidies, Lazard calculated that large-scale wind farms cost more than $100 per megawatt-hour of generating capacity back in 2009. Today, it says, that number is just $37/mWh.
Meanwhile, the newest and most efficient natural-gas generating plants cost $61 to $87 per mWh.

http://www.greencarreports.com/news/1094490_some-solar-wind-power-competes-with-natural-gas-without-incentives-study