We use cookies in order to personalize your site experience.
Ohm Sweet Ohm
Calculate voltage, current, resistance, and power with ease!
Enter any two values to calculate the remaining ones
UPS Battery Backup Calculator
How to Calculate UPS Battery Backup Time
To calculate the backup time of a UPS battery, use the following formula:
Backup Time (hours) = (Battery Capacity (Ah) × Battery Voltage (V) × Efficiency) / Load Power (W)
Where:
- Battery Capacity (Ah): The ampere-hour rating of the battery.
- Battery Voltage (V): The voltage of the battery (e.g., 12V, 24V).
- Efficiency: The efficiency of the UPS system (typically 0.8 to 0.9).
- Load Power (W): The power consumption of the connected devices.
Example Calculation
If you have a 12V battery with a capacity of 100Ah, an efficiency of 0.85, and your load is 300W, the backup time is calculated as follows:
Backup Time = (100Ah × 12V × 0.85) / 300W = 3.4 hours
Conclusion
Using this method, you can estimate the battery backup time for your UPS system to ensure uninterrupted power during outages.
