1. What is the APC UPS Runtime Formula?

The APC UPS Runtime Formula calculates how long a UPS (Uninterruptible Power Supply) can power connected equipment based on its battery capacity and the power draw of the connected load.

2. How Does the Calculator Work?

The calculator uses the APC UPS runtime formula:

Where:

• \( Capacity \) — Battery capacity in Watt-hours (Wh)
• \( Load \) — Power consumption of connected equipment in Watts (W)
• 60 — Conversion factor from hours to minutes

Explanation: The formula converts the battery capacity from Watt-hours to Watt-minutes and divides by the load to determine runtime.

3. Importance of Runtime Calculation

Details: Knowing your UPS runtime is crucial for ensuring critical equipment remains powered during outages and for proper UPS sizing.

4. Using the Calculator

Tips: Enter the UPS battery capacity in Watt-hours and the total load in Watts. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my UPS capacity?
A: Capacity is typically listed in the UPS specifications or on the battery label, often in VA or Ah which may need conversion to Wh.

Q2: How do I determine my total load?
A: Sum the power consumption of all connected devices, usually found on their power labels or specifications.

Q3: Is this calculation accurate for all UPS models?
A: This provides an estimate. Actual runtime may vary based on battery age, temperature, and UPS efficiency.

Q4: What factors affect UPS runtime?
A: Battery age, ambient temperature, load percentage, and battery maintenance all impact actual runtime.

Q5: How often should I test my UPS?
A: Regular testing (at least annually) is recommended to ensure proper operation and battery health.