1. What is the UPS Size Calculation?

The UPS (Uninterruptible Power Supply) size calculation determines the appropriate capacity of UPS needed to support your computer equipment for a desired runtime during power outages.

2. How Does the Calculator Work?

The calculator uses the basic UPS sizing formula:

Where:

• \( PC\ Power \) — The power consumption of your computer in watts
• \( Runtime\ Factor \) — A multiplier based on desired backup time (typically 1.5-3 for home/office use)

Explanation: The formula calculates the Volt-Ampere (VA) rating needed for your UPS based on your computer's power draw and desired runtime.

3. Importance of Proper UPS Sizing

Details: Proper UPS sizing ensures your equipment has enough backup power to safely shut down during outages and protects against power fluctuations. Undersized UPS may not provide enough runtime, while oversized UPS is unnecessarily expensive.

4. Using the Calculator

Tips:

• Find your PC's power consumption (usually listed on power supply or measured with a watt meter)
• Typical runtime factors: 1.5 for basic shutdown, 2-3 for extended runtime
• Add 20-30% for future expansion

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts and VA?
A: Watts represent real power, VA represents apparent power. For PCs, VA is typically 1.4× watts (power factor ~0.7).

Q2: How do I find my PC's power consumption?
A: Check your power supply rating (maximum draw), use a watt meter, or estimate based on components (CPU+GPU+TDP+20%).

Q3: What runtime factor should I use?
A: 1.5 for basic shutdown (5-10 minutes), 2 for 15-20 minutes, 3 for 30+ minutes runtime.

Q4: Should I include peripherals?
A: Yes, add monitor and essential peripherals to your total power calculation.

Q5: What about battery aging?
A: UPS batteries degrade over time - consider 20% extra capacity for 3+ year lifespan.