How many VA you need and how long the backup lasts — the maths made simple.
A sudden power cut costs more than unsaved work — drives and motherboards can be damaged when they lose power mid-write. A correctly sized UPS prevents both.
How many VA do you need?
A simple rule: add up the wattage of your PC and monitor, then divide by 0.6 to get the minimum VA rating.
- Office PC + 24" monitor (~150W) → 650VA is enough, giving 15–20 minutes.
- Gaming PC with a graphics card (~350W) → go for 1200VA or higher.
Things to remember
Never plug a printer or fridge into a UPS — a laser printer draws a huge surge as it warms up and will trip the unit. Batteries typically last two to three years; if backup time drops off sharply, it is time for a replacement.
Bring your configuration to our showroom and we will tell you the right VA rating before you buy.