I’ve been watching the consumer level solar panel market and they’ve been continually getting more powerful and cheaper for years. There are 485 watt Kyocera or LG panels now, for what a 200 watt panel cost less than a decade ago. These are the “good” ones, not the throwaway Chinese panels. 25 year warranty.
The lowest cost utility scale solar projects are in texas where the lowest cost one reported was about .0321@kwh in 2016. But these are subsidized costs. That said utility scale solar costs in the USA are falling pretty rapidly too.
https://cleantechnica.com/2016/04/30/texas-solar-prices-currently-lowest-price-per-watt-country/