What is the difference between solar power on-grid and off-grid?
means that your solar system is connected to the GRID of
your local utility. This is what most residential homes will use because if your solar system is under or over-produced with respect to your varying energy needs, you will be covered. For you, all this means your utility system is acting as your battery space.
If you use your solar panels or device to produce more energy than you use, the excess energy is sent to the power company of your grid, enabling you to build credit that you can cash out at the end of the year, in a process called net metering. It’s beneficial to be grid-tied because you don’t need to buy a costly battery backup system to store any excess energy.
means that you are not connected to the power system or utility company of your grid in any way. This is appealing because your energy use is 100% self-supporting. There are drawbacks, however, as off-grid systems allow you to buy back-up batteries that can be costly, voluminous, and not very environmentally friendly.