Home energy storage systems store electricity so you can use it later, whether at night, during peak rates, or when the grid goes down. They help homeowners use more of their solar energy, reduce reliance on the grid, and improve energy independence. This guide breaks down the architecture of these systems using plain lang. The solar inverter, which converts DC from the array (and often battery) into usable AC power — and may also manage the flow of energy between generation, storage, loads and the grid. Unlike relying solely on the grid, these systems let you: Reduce energy bills: Use stored solar energy during peak hours when grid electricity rates. What Is Home Energy Storage? A home energy storage system is an innovative system consisting of a battery that stores surplus electricity for later consumption. Batteries can also provide backup power during.