Here's some data for your claim: https://www.eia.gov/electricity/gridmonitor/dashboard/electric_overview/regional/REG-CAL https://www.eia.gov/electricity/gridmo

Here's some data for your claim: https://www.eia.gov/electricity/gridmonitor/dashboard/electric_overview/regional/REG-CAL https://www.eia.gov/electricity/gridmonitor/dashboard/electr... . Interestingly it does look like there's two peaks a day, 6-8pm when people get home and 8-10am as people are waking up. Weekend morning peaks are noticeably lower than weekdays too.