Why japan and US have more solar heated homes than other counters?

The United States and Japan do not have more solar heated homes than other countries. In fact, Germany has the highest number of solar heated homes in the world, with over 1.3 million installations. China and Austria also have a large number of solar heated homes, with over 1 million and 500,000 installations, respectively.

The reason for this is that Germany and Austria have been promoting solar energy for many years, with government incentives and subsidies that make it more affordable for homeowners to install solar panels. In addition, both countries have a lot of sunshine, which makes solar energy a more viable option.