A battery backup system stores electricity for later use. When power from the utility grid becomes unavailable or when stored energy is needed, the system can provide electricity to selected circuits or portions of your home depending on the system design.

Yes. Many homeowners pair battery storage systems with solar installations. This allows excess solar energy to be stored and used later, helping maximize the benefits of a solar energy system.

The answer depends on the battery size and system design. Some systems support essential circuits such as lighting, refrigeration, internet equipment, and outlets, while larger systems may provide more extensive backup capabilities.