The solar energy from your system will enter your home electrical panel (in most cases) and be available for use by your home. If appliances and other electrical loads in your home need energy, they will use the solar energy before pulling additional energy from the utility grid. On days when you make more from your solar system than you need, it will go back to the grid and you will get a credit. On days (and nights) when you use more than you make, you will pull energy from the utility grid. Based on the monthly energy bill estimate you give us, we’ll tell you what percentage of your total electricity usage will come from solar power over the course of a year.