The realm of home energy storage encompasses diverse operational modalities—grid-tied, off-grid, hybrid, and demand response systems—each serving distinct needs and preferences. . As homeowners worldwide turn to solar + battery storage systems for energy independence, the choice of operating mode for your home energy storage inverter becomes increasingly important. This is an important task as it directly affects your ROI and payback period. Grid-tied operation, where the system interacts with the utility grid, enables homeowners to store excess. . Backup Reserve determines how much of Powerwall's stored energy will automatically be saved for backup power. The default Backup Reserve is 20%.