A solar battery is a power storing device that can be charged by the energy your solar panels generate. This energy is saved for later use during times your solar system is not producing enough energy to power your needs. This is common during low sunlight times such as early mornings and evenings. A solar battery can also power your home in times of power outages if it is set up with backup functionality.
Depending on your individual circumstances and power usage, more often than not you will find your solar system will produce more power than you are using. Without a battery storage device, this excess power will get fed or sold back to the grid. You might think this is a great idea but remember that your electricity provider will almost always sell the power back to you at a much higher rate than what you sold it for.
