Trade depth of discharge against cycle life and usable energy.
Shallower cycling extends cycle life more than proportionally, so lifetime throughput often peaks at a moderate depth of discharge rather than at either extreme. Lifetime energy throughput rather than nominal capacity is what determines the cost per kWh cycled, and therefore the economics of storage.
Battery Depth of Discharge
Cycle life rises as depth of discharge falls, roughly as (100 ÷ DoD)^0.8
Cycle life rises as depth of discharge falls, roughly as (100 ÷ DoD)^0.8 Shallower cycling extends cycle life more than proportionally, so lifetime throughput often peaks at a moderate depth of discharge rather than at either extreme.
Lifetime energy throughput rather than nominal capacity is what determines the cost per kWh cycled, and therefore the economics of storage.
This calculator takes 4 inputs: Nominal capacity, Depth of discharge, Cycle life at full discharge, Cycles per year. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.