It’s a government mandated offer giving eligible customers at least three hours of free daytime electricity, capped at 24 kWh a day.

The trade-off is that you shift usage away from the evening peak in exchange. The free window sits during peak solar generation, typically around midday. Your retailer confirms the exact hours when you sign up.

You need a smart meter and you opt in through your retailer. You don’t need solar panels, and you don’t need to own the property.