The capacity factor for utility scale solar PV in the US was 27% in 2017: https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_6_07_b https://w

The capacity factor for utility scale solar PV in the US was 27% in 2017: https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_6_07_b https://www.eia.gov/electricity/monthly/epm_table_grapher.ph... The capacity factor gap with utility scale gas plants isn't as large as you might guess from looking at residential rooftop solar.