How Photovoltaic Systems Work
There are three basic types of solar energy systems available for residential and commercial use: (1) Grid-tie (2) Grid-tie with Backup and (3) Off-grid.
All use solar photovoltaic (PV) panels and are typically installed on the south facing roof of your structure. These panels power the system, producing DC (direct current) electricity when the sun is available. (If roof space is restricted or compromised, we can offer alternative solutions.)
Grid-Tie with Battery Backup Systems
Grid-tie with backup systems are a small but growing type of solar energy system for homes and businesses. They are designed to function when the electric utility grid is unreliable or when the constant operation of some devices is essential. With this type of system, you’ll be able to move one step closer to total energy independence.
Typically these systems use a bank of batteries paired with solar energy panels to supply power to the building whenever the electric utility grid is down.
For this type of system, DC power from the solar array travels to a charge controller that constantly monitors the level of charge to the batteries. When the batteries are low on charge, electricity passes to them. If they are fully charged, the electricity is diverted to an inverter and then the electrical wiring of your structure.
When utility grids fail, batteries power the system
If the sun is not available, the utility grid provides power to the house like a grid-tie system. Excess energy can be sent back to the electric utility for credit. When there is no power from the utility grid, however, power is supplied by the batteries and the solar panel array.