Calculate UPS battery backup time based on capacity, voltage, and load
UPS (Uninterruptible Power Supply) systems provide critical backup power during outages. The battery backup time is a crucial factor in determining the reliability of a UPS system. It depends on several factors including battery capacity, voltage, and the load connected to the UPS.
The backup time can be calculated using the formula: Backup Time (hours) = Battery Capacity (Ah) * Battery Voltage (V) * Efficiency / Load (W). The efficiency of the UPS system is typically around 0.8 to 0.9.
For example, a UPS with a 100Ah battery, 12V voltage, and an efficiency of 0.85 can provide backup power for a load of 100W. The backup time would be calculated as: Backup Time = (100Ah * 12V * 0.85) / 100W = 10.2 hours.
| Battery Capacity (Ah) | Battery Voltage (V) | Load (W) | Backup Time (hours) |
|---|---|---|---|
| 100 | 12 | 100 | 10.2 |
| 200 | 24 | 200 | 20.4 |