Day 1 - The house is powered by solar generation during the day any excess is used to fill the battery first. Any remaining energy is then exported to the grid. The house then runs off the battery in the evening. On this particular day, it used its own electricity until 3am, when it switched to the grid.
Day 2 - The battery is topped up with one hour of cheap overnight grid electricity, which is then used to power the house in the morning instead of using peak rate electricity from the grid. During the day the house runs off the solar, putting any excess into the battery, which is then used in the evening.