| Units: | cycles |
| Mode: | Output Only |
| Multi-band: | False |
| Default Value: | |
| Validation Rule: | |
| Key Property: | No |
| Description: | Number of cycles completed |
Battery Age is the average age of the Units in cycles.
A complete battery charge and discharge, between the specified Min SoC and Max SoC values, is considered to be a full cycle, with the Age based on 'shallow discharging', where the battery can partially discharge and then recharge.
Age = (Generation / Discharge Efficiency + Load × Charge Efficiency ) × time / ( 2 × ( Max SoC - Min SoC ) × Units × Capacity )
The summary value of this property is simply the sum of the interval values.
| Battery | Property | Value | Units |
|---|---|---|---|
| Batt1 | Units | 1 | - |
| Batt1 | Capacity | 10 | MWh |
| Batt1 | Max Power | 1 | MW |
| Batt1 | Max SoC | 90 | % |
| Batt1 | Min SoC | 10 | % |
Assuming a battery has been defined as above, and it discharges for
one hour at a constant 1 MW level with 100% discharge efficiency, then
the Age would be:
Age = (1/100%)* 1 / ( 2 * ( 90% - 10% ) * 1 * 10) = 0.0625 cycles
Note that the Capacity used in the age formula is the commissioned unit capacity, i.e. before the effects of any Capacity Degradation .