The UK, on the other hand: https://www.fmb.org.uk/homepicks/news/surge-in-solar-panel-i... ; helped by an efficiency mandate on new houses.
More than 40% of Texas's energy was carbon free already in 2022 [1], and they are still installing solar. Not on public lands, but most solar wasn't installed on public lands anyway.
Having said that, in the big picture the US is far behind China indeed regarding solar renewable installations. Compared to the EU, California is far behind and Texas is a bit behind. Germany for example sits at around 50% renewable [2].
[1]: https://www.noahpinion.blog/p/blue-states-dont-build-red-sta...
[2]: https://ember-energy.org/latest-insights/germany-sets-new-re...
There is still a lot of fossil energy consumed, too.
https://www.statista.com/statistics/263492/electricity-price...
It seems that something is not working that great in the UK...
Eventually more green energy will overcome this issue
Many of the commercial solar and wind farms run on a contracts for difference price - they're guaranteed a price for the energy they produce and when the market price goes over that a rebate get's paid to a Quango and should eventually feed into bills payers prices
Worldwide, electricity prices are set by the highest priced generator at the given moment of needed generation -- it's the dispatch curve. And generally, the generators that are the fastest to spin up to meet that incremental load are natural gas fired generators.
As to the GP's point, my intuition (happy to be proven wrong) is more that natural gas, and therefore electricity, is cheaper in the US, simply because it's more abundant in the US.
The USA is a huge place with prices all over the map.
Here are PG&E electricity prices in California from my recent bill:
peak: 53.0 + 18.3 = 71.3 c/kWh
partpeak: 51.3 + 11.1 = 62.4 c/kWh
offpeak: 34.4 + 09.8 = 44.2 c/kWh