— green button
Yes, for most of what people actually want to know: your utility's 15-minute (or hourly) Green Button data is enough to see which days and hours drove your bill, spot heat-wave load, confirm overnight EV charging, and gauge whether a time-of-use rate is worth switching to. It is not enough to name individual appliances, show live watts on your phone, or debug a solar problem at the breaker — those need hardware.
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