1. What is Battery Run Time?

The battery run time is the estimated duration a UPS (Uninterruptible Power Supply) can power connected devices during a power outage. It depends on the battery capacity (Ah), voltage (V), and the power consumption (W) of the connected load.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( \text{Battery Ah} \) — Battery capacity in amp-hours
• \( \text{V} \) — Battery voltage in volts
• \( \text{UPS Inverter W} \) — Power consumption of connected load in watts

Explanation: The formula calculates how long a battery can supply power by dividing the total energy capacity (Ah × V) by the power consumption rate (W).

3. Importance of Run Time Calculation

Details: Accurate run time estimation helps in selecting appropriate UPS systems for critical applications, ensuring sufficient backup time for safe shutdown or continued operation during power outages.

4. Using the Calculator

Tips: Enter battery capacity in Ah, voltage in V, and UPS inverter load in W. All values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all UPS systems?
A: This provides a theoretical estimate. Actual run time may vary due to battery age, temperature, inverter efficiency, and discharge rate.

Q2: How can I increase my UPS run time?
A: You can increase run time by using larger capacity batteries, connecting additional battery banks in parallel, or reducing the connected load.

Q3: What's typical run time for a home UPS?
A: Typical home UPS systems provide 10-30 minutes for computers or 1-2 hours for basic lighting, depending on battery capacity and load.

Q4: Does battery type affect run time?
A: Yes, different battery types (lead-acid, lithium-ion) have different discharge characteristics that can affect actual run time.

Q5: Should I derate the calculated run time?
A: It's often recommended to multiply the result by 0.8 to account for inefficiencies in real-world conditions.