Combining grid connection with storage delivers savings plus backup during outages.
Hybrid systems suit sites where the grid exists but is unreliable, or where bill reduction must coexist with backup for essential loads.
Energy is managed between the array, grid and battery according to priority. Design defines when storage charges and when reserve power is used.
Clarity of goals is key: maximum savings, maximum continuity, or a balance of both. That answer shapes specifications from day one.