In 2020, 3.7% of U.S. single-family homes, including mobile homes, generated electricity from small-scale solar systems (solar panels installed on a home or building), according to our 2020 Residential Energy Consumption Survey (RECS). In 2018, 1.6% of U.S. commercial buildings had small-scale solar generation, according to our 2018 Commercial Energy Consumption Survey (CBECS).