Adding Battery Backup to an Existing Grid-Tied Solar System
The steps for adding battery backup to make your grid-tied solar system resilient against power outages.
Grid-tied solar systems feed the electricity they generate directly into the grid. However, these systems cannot supply energy when there is no sunlight or during power outages. Adding battery backup makes your solar system resilient against interruptions. You can add battery backup to an existing grid-tied solar system by following the steps below.
Choose a battery backup system: Batteries come in different types, such as lithium-ion or nickel-cadmium (NiCd). Lithium-ion batteries are preferred for their higher energy density, longer life and lower cost.
Size your system: Your battery backup system must be sized to cover the energy needs of your home. This means the battery system should cover a defined share of your daily energy consumption.
Make the connections: The battery backup system requires wiring between the inverter, the charge controller and the batteries. This should be done by a professional electrician.
Test the system: After installing the battery backup system, test that it works correctly. This ensures the system takes over properly during a power outage.
By following these steps, battery backup can be added to an existing grid-tied solar system. Remember, though, that professional electrical support is recommended for this project.