The bill had jumped eighty dollars in one billing cycle.

I clicked on the daily smart meter data.

The site showed a detailed line graph of our hourly power use.

During the day the line stayed low and flat.

The kids were at school and Kendra was at work.

In the evening it climbed a little as lights and appliances came on.

Then I looked at the middle of the night.

Huge spikes in power use showed up between two and five in the morning.