I think the electricity company makes payment variations so that the consumer doesn't notice it too much. That way I know that I'll pay more or less within that amount, whether the AC is on or not, or whether or not an extra 3060 is on

that must be it. My whole life has been like this... I'm 54 years old now and the electricity is always within those values, whether it's cold or hot. Im in Portugal..but i beleave is different country to country

You mean when they average monthly payments based on your full year's consumption? Yes, some of them do. In this case it's harder to track what you use even though you pay the full price anyway, right.