Types of Systems
Grid-tie systems generate electricity, sending this energy back to your utility company’s power grid, which the power companies buy from you. You then purchase only what you need and the excess remains in the power grid for other users. In effect, this means the utility company will be paying you to produce energy for them, since the energy you produce counts against the energy your home or business uses.
Grid Tie with battery backup
If you add battery-backup to a grid-tie system, you will be able to store any solar power you create but do not immediately use and then use that power later when you do need it. There are a couple of disadvantages to the batter backup system: You will have an additional cost of batteries, housing the batteries, and a charge controller along with routine maintenance of the batteries. The grid-tie systems without battery-backup are relatively maintenance-free. Additionally, most batteries contain heavy metals which pose environmental consequences.
Types of Mounts
The most common way of mounting solar. A roof mount system means the solar panels are racked to your roof. A benefit to a roof mount system is it minimizing the space your solar system takes.
If you do not have a roof that supports solar or do not want to install on the roof, a pole mount system is a good choice. The racking equipment is anchored from the ground and can be placed around your property. A benefit of a pole mount system is the system can be placed in the most advantageous location for solar, unlike a roof mount, optimizing your solar production.