AFAIK it depends on the location. For example, where it's hot, people are running aircons during the day. Where the weather is cold, you need to run heating, b

AFAIK it depends on the location. For example, where it's hot, people are running aircons during the day. Where the weather is cold, you need to run heating, but (1) often that's not electric, and (2) heat stores relatively well (in e.g. hot water tanks). In temperate climate, the uncomfortable power surge happens at ~6pm, when people get home from work and start turning on the light and running home appliances (stove to cook dinner, opening the fridge which must cool, etc).