Power cuts, voltage changes and brief interruptions can damage unsaved work and make a desktop computer unreliable. Choosing a UPS in Bangladesh is not simply a matter of buying the largest VA number on the box. You need to match real wattage, expected backup time, battery type and after-sales support to your PC.
Quick answer: what UPS capacity do you need?
| Typical setup | Sensible starting range |
|---|---|
| Office PC, one monitor and router | 650–850 VA |
| Mid-range gaming PC and monitor | 1000–1500 VA |
| High-power workstation | 1500 VA or an online UPS sized from measured watts |
These are starting points, not guarantees. Read the UPS watt rating as well as its VA rating and measure your actual load where possible.
VA and watts are not the same
VA describes apparent power, while watts describe the real power your equipment consumes. A 1000 VA UPS might support considerably less than 1000 watts. Check the manufacturer’s watt limit and keep headroom instead of running near the maximum.
Estimate the load correctly
- Add the PC’s realistic consumption, not merely the power-supply label.
- Add the monitor, router and any essential network device.
- Do not connect laser printers, heaters or other high-surge appliances.
- Aim for roughly 20–30% capacity headroom.
Line-interactive or online UPS?
A line-interactive UPS is usually the practical choice for homes and offices. Automatic voltage regulation can correct moderate fluctuations without switching to battery. An online double-conversion UPS costs more but provides cleaner, continuously regenerated power for sensitive workstations and servers.
Backup time: set a realistic goal
For a desktop, the primary job of a UPS is often to let you save work and shut down safely. Five to fifteen minutes may be enough. Longer runtime requires a larger battery system and proper ventilation. Battery runtime falls as load increases and also declines as the battery ages.
What to check before buying in Bangladesh
- Written watt rating and load chart
- Local warranty and replacement-battery availability
- Battery chemistry, capacity and expected replacement cost
- Automatic voltage regulation and cold-start support
- USB monitoring and automatic shutdown support
- Enough correctly spaced outlets
Safety checklist
Place the UPS in a dry, ventilated area. Do not cover its vents or overload a multiplug. Earthing and building wiring matter; a UPS is not a substitute for proper electrical protection. The BSTI publishes electrical-safety standards, including protection against electric shock.
Frequently asked questions
Can I connect a router to the same UPS?
Yes, if its wattage is included in the load calculation. A router consumes little power and can often remain online longer than the PC.
Does a UPS protect against every surge?
No. It adds protection, but severe lightning and wiring faults require properly designed building protection and earthing.
How often should the battery be replaced?
It depends on heat, cycling and battery quality. Replace it when runtime drops sharply, the unit reports a fault or the battery swells.
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