No, solar panels do not work at night, as they rely on sunlight to generate electricity. When the sun goes down, your solar system stops generating power, as there is no sunlight available. Once your solar system stops generating for the night, you switch back to the grid, where you are charged at standard rates. However, a solar battery can store excess energy generated during the day, allowing you to use this solar energy at night. If you don’t have a battery, excess energy will get pumped back into the grid, for which you will receive feed-in tariffs.
Why Solar Panels Stop Working at Night
Solar panels work by converting sunlight particles (photons) into electricity. This process is called the photovoltaic (PV) effect, which is why solar panels are sometimes called PV modules. When sunlight hits a panel, photons strike electrons in the silicon cells of the panel, which create direct current electricity (DC). The inverter then converts that DC electricity into usable alternating current (AC), which is used to power your home.
What About Other Sources of Light?
A solar energy system can only produce electricity if photons are present. No sunlight means no photons to generate an electrical flow. Solar panels can only respond to solar radiation, not artificial light. The energy intensity of the sun is thousands of times stronger than indoor or street lighting. Without that intensity, the system cannot produce meaningful output.
Moonlight is just sunlight reflecting off the moon. Its intensity is extremely low compared to direct solar radiation. A PV panel may generate some energy from other light sources, but it is so minimal that it cannot power home appliances.
What Powers Your Home at Night If You Have Solar?
Your house will draw electricity from the grid at night if you have a standard solar PV system. Any unused energy generated during the day will also be exported to the grid. The government reimburses a few cents per kilowatt-hour exported by households, but it’s not enough to cover your electricity usage at night.
However, adding a solar battery to a system allows surplus solar energy to be stored. Excess energy generated by solar panels is directed to charging the battery during the day. This stored energy can then be used at night or when there’s more energy demand than the panels can produce. The grid then becomes the backup source if a battery’s stored energy is exhausted. Households consume most of their daily electricity after sunset, so it’s definitely worth installing a battery to maximise the use of electricity generated by your solar panels.
If you’re considering installing solar panels and/or a battery, contact South West Solar Force. Our team will assess your property and find the best solar solution for you.
