What is the difference between a Grid-tied and a Grid-tied System with Battery Backup?
A Grid-tied PV System produces solar electricity during the day and spins your utility meter backwards for you to use free electricity during the night or to bank excess power until you need it. Currently, utility companies use an annual cycle for payment of your utility bill. A Grid-tied Photovoltaic System with Battery Backup provides the same benefits as the system without batteries but, this system will provide limited electricity if the grid fails. The usual protected circuits are refrigerator, telephone, alarm and entertainment circuits. The system provides enough electrical power to provide emergency lighting and minimal comforts during prolonged electrical outages. High current items like air conditioners and pool or spa pumps will not run on battery power.
