How we calculate
This page is being written. It will explain each step of the estimate. It starts with the part that decides most of the answer: when a home uses electricity.
When homes use electricity
A time-of-use plan charges more in some hours than others, so the saving depends on when you use power. This is the share of a typical weekday's use in each hour, for homes in the state you pick.
Source: NREL ResStock (2025 release 1, 2018 weather), existing homes, weekdays. Each bar is that hour's share of the day; the bars add up to 100%.