It makes electricity during the day, but isn’t most electricity used at night?
Of course we use lighting at night, but that’s actually a fairly small part of an electricity bill. Some appliances are on continuously such as fridges and freezers. People with Solar PV learn how to use their electricity at the best time. You can run dishwashers, washing machines and tumble-dryers in the daytime in the week and at weekends; if you run the energy hungry appliances during the day on free electricity you’ll really cut your electricity bill.