Heatpumps I kind of get because they’re still rare here (us). But solar is everywhere. I don’t understand how a 350mil person market is so much more expensive f

Heatpumps I kind of get because they’re still rare here (us). But solar is everywhere. I don’t understand how a 350mil person market is so much more expensive for solar than a 30mil one. The US generally has cheaper labor, less construction rules, and cheaper components due to volume . the solar thing is mysterious to me.