If you believe that your Solar PV is working, but it is on reduced power or it is producing less power than it used to. There could be a fault with the panels, you should check for shading of the panels or the panels being dirty. If there are no other issues with the Solar Panels there could be an issue with the inverter or the DC wiring.
When you don't use all the energy generated by your solar panels during the day, a solar battery can store the excess so you can use it at another time. For example, at night or on particularly cloudy days when your panels aren't generating as much energy.
Solar PV is largely maintenance-free. But minor issues can impede power production for weeks without you noticing. In a study of 255 PV powered homes in the U.S, 54 had issues with their PV system. Most homeowners had no idea their PV system had a fault. Your electricity bill should tell you if your system's producing expected generation.
Almost every solar light has an on/off switch, typically located at the back. During the day, the solar panel charges the battery, but if the switch is off, the lights won’t turn on when night falls. So, if your solar lights aren’t lighting up, the first thing to check is this switch.
You can use solar panels during a power outage in the UK if your system was installed with a specific relay. This relay is a switch that enables you to flawlessly switch between grid power and your supply of solar electricity.
With a battery, solar panels can run your household’s electricity for hours or even days during a power cut. The average battery can hold a maximum of 8 kWh and the typical household goes through 7.4 kWh per day, so if you have a full battery and don’t try to save energy, you should have power for more than a day.