In other parts of the world this is fairly affordable. In the USA its astronomically higher. I speak from firsthand experience. When installed its wonderful, but is really pricey up-front, and just a small fraction of Americans are both homeowners, and can afford to buy these systems. The Inflation Reduction Act brings the price down from 10x the cost of other nations to just 7x the cost. Its an improvement, but not enough to make these systems widely available to all household budgets.