Why Sizing Matters

Choosing the wrong UPS capacity is one of the most common and costly mistakes Nigerian homeowners and business owners make. An undersized UPS will overload and shut down under normal operation. An oversized one wastes money and runs inefficiently. Getting it right means reliable backup for the loads that matter most to you.

The UNICRON Home UPS range — available from RA2 International — offers five capacities from 1100VA to 8000VA, covering everything from small household essentials to industrial-grade loads. Here's exactly how to pick yours.

Step 1: List Your Critical Loads

Start by identifying what you need to keep running during a power outage. Be realistic — you don't need to power everything. Focus on essentials:

  • Lights (LED lights typically use 5–15W each)
  • Ceiling fans (50–75W each)
  • Television (80–200W depending on size)
  • Refrigerator (150–400W, surges higher at start)
  • Internet router / modem (10–30W)
  • Computers / laptops (50–200W)
  • CCTV / security system (30–60W)
Pro Tip: Check the wattage label on the back or bottom of each appliance. If you see VA (volt-amperes), use a power factor of 0.8 to convert: Watts = VA × 0.8.

Step 2: Calculate Your Total Load

Add up the wattage of everything you want to power simultaneously. Then apply a 20–25% safety margin on top to account for startup surges and future load additions.

Example calculation:

  • 4 LED lights × 12W = 48W
  • 2 ceiling fans × 70W = 140W
  • 1 TV (55") = 120W
  • 1 router = 20W
  • 1 laptop = 80W
  • Total = 408W
  • With 25% margin = 408 × 1.25 = 510W

At a power factor of 0.8, the VA requirement is: 510W ÷ 0.8 = 638VA. So a UNICRON UN-1100 (1100VA) would handle this load comfortably with room to spare.

Step 3: Choose the Right UNICRON Model

Use this quick reference guide to match your calculated VA requirement to the ideal UNICRON model:

Model Capacity Best For
UN-1100 1100VA / ~880W Small apartments, basic home essentials, routers, lights, fans
UN-2000 2000VA / ~1600W Mid-size homes, clinics, small retail counters, mixed loads
UN-3000 3000VA / ~2400W Large homes, offices, multiple AC units (small), commercial counters
UN-5500 5500VA / ~4400W Large estates, multi-room offices, semi-industrial loads
UN-8000 8000VA / ~6400W Industrial, factories, large commercial buildings, critical uptime

Step 4: Factor in Battery Runtime

The UPS capacity tells you the maximum load it can handle. How long it runs depends on the battery bank connected to it — not just the UPS itself. A larger battery bank gives longer runtime for the same load.

Runtime Formula: Runtime (hours) = Battery Capacity (Ah) × Battery Voltage (V) × Efficiency ÷ Load (W). At RA2 International, our technical team can help you design the right battery bank for your runtime requirements.

Step 5: Consider Pure Sine Wave Output

All UNICRON Home UPS models output pure sine wave power — identical to grid power quality. This is important for:

  • Sensitive electronics (computers, medical equipment)
  • Variable-speed equipment and inverter air conditioners
  • Any inductive load (motors, compressors)

Modified sine wave inverters — common in cheap alternatives — can damage sensitive equipment over time. UNICRON's pure sine wave output eliminates this risk entirely.

Ready to Order?

RA2 International stocks all five UNICRON Home UPS models with immediate availability. Our technical team can review your specific load list and recommend the exact model and battery configuration for your application — at no extra charge.

Contact us through the form below or call/WhatsApp us directly and get a quote within 24 hours.

Home UPS UNICRON Power Backup Solar Nigeria Load Sizing