US reaches 2 million rooftop solar installations

June 2019—This is a great lesson in exponential growth and technology deployment. Solar technology was developed 40 years ago. In 2016 we hit 1 million installations. We use passed 2 billion, only 3 years later.

By two years from now, the number of solar home installations will climb to 3 million, and in 2023 it will climb to 4 million, having doubled in 4 years. By 2024, new home panels will be installed at the rate of one a minute.

California, Arizona, New Jersey, New York and Massachusetts lead the way, though Hawaii is also a leader despite its small population.