Augmentation
Also known as: Battery Augmentation
Adding new battery capacity to an aging plant to offset degradation and restore contracted performance. Typically triggered when State of Health drops below a threshold defined in the degradation curve. May involve swapping battery modules or adding new DC blocks.
In energy storage
Augmentation is typically planned for year 7–10 of a project, when cumulative degradation approaches the warranty SoH floor (often 60–70% of original nameplate). Integrating new cells with aged ones introduces voltage and impedance mismatches, so augmentation often involves adding complete DC blocks rather than mixing new modules into existing racks. The augmentation schedule and cost assumptions are factored into the financial model at the time of investment.