| Emergency discharge capability |
Shall provide continuous discharge during a power failure condition. The emergency duration is selected as 1 hour. |
| Remaining capacity before discharge end |
The remaining capacity at the end of discharge, just before closing, shall not be less than 25% of the rated capacity. |
| DC bus voltage dip |
Shall ensure that the DC bus voltage drop does not exceed 10% when a surge load occurs. |
| Closing current for maintenance-free batteries |
Generally shall not exceed 4C. |
| Reserve factor (aging allowance) |
A reserve factor of 1.2 is adopted to account for capacity degradation of the battery bank at the end of its service life. |
| Capacity design reference |
Specific capacity design shall refer to applicable national standards and technical documentation provided by the battery manufacturer. |
