At night I run off my battery. I can’t go completely off-grid, the days are simply too short in winter, but for like 70% of the year I get free electricity.

In the winter months it still gives me an advantage because I can buy energy at the lowest price point of the day (i.e. when demand is lowest relative to production).

It also allows me to sell the over-production of my solar panels at the most expensive part of the day. And it’s all handled automatically by the software in my solar system. It takes into account the prices over the day, the predicted energy usage during the night, the weather prediction for the next day and uses that to determine when and how much to sell back to the grid and/or when to buy electricity from the grid.