US costs for rooftop solar (at build time or retrofit) are misleadingly high.

In the EU build time solar roofs overlaps with utility costs but up to 1.5x , and retrofit is say 2x.

To give context. In the EU adding solar to new homes is cost competitive with running existing(!) nuclear plants. In the US only utility scale is competitive with that.

Retrofit rooftop solar is about the same as new nuclear in the US, retrofit is 25% cheaper than new nuclear in the EU.