How to Calculate IPS Load for Your Home in Bangladesh — Complete Wattage Guide 2026
Why Load Calculation Matters for Your IPS
Choosing the right IPS capacity is one of the most important decisions for your home. Get it wrong, and you either waste money on unnecessary capacity or find yourself with insufficient backup during load shedding. In Bangladesh, where power outages are a daily reality, calculating your IPS load correctly ensures you get exactly what you need.
The good news? You don’t need an electrical degree to do this. This guide walks you through the simple process of calculating your home’s power requirements and matching them to the right IPS system.
Step 1: List All Appliances You Need to Run
Start by making a list of every appliance you want backup power for. Don’t guess—check the actual wattage rating on each device. This information is usually found on a label near the power cord or on the product specification sheet.
Common Household Appliance Wattages in Bangladesh
| Appliance | Average Wattage | Typical Usage Hours/Day |
|---|---|---|
| Ceiling Fan | 60-80W | 12-16 hours |
| LED Light (18W) | 18-20W | 6-10 hours |
| LED TV (32-inch) | 40-50W | 4-6 hours |
| Cell Phone Charger | 5-10W | 2-3 hours |
| Laptop | 45-65W | 4-8 hours |
| Refrigerator (120-150L) | 100-150W | 24 hours (cycling) |
| Water Pump (1/2 HP) | 500-750W | 2-4 hours |
| Computer Desktop | 200-400W | 4-6 hours |
| Rice Cooker | 600-1000W | 1 hour |
| Microwave | 800-1200W | 0.5 hour |
Note: These are average values. Always check your specific appliance’s rating plate for accurate numbers.
Step 2: Calculate Your Total Daily Consumption
Multiply each appliance’s wattage by its daily usage hours to get watt-hours (Wh). Add them all up for your total daily consumption.
Sample Calculation: Small Bangladeshi Home
- 4 Ceiling Fans × 70W × 14 hours = 3,920 Wh
- 6 LED Lights × 18W × 8 hours = 864 Wh
- 1 LED TV × 50W × 5 hours = 250 Wh
- 1 Refrigerator × 120W × 24 hours = 2,880 Wh (adjusted for compressor cycling: ~1,440 Wh)
- 1 Laptop × 60W × 6 hours = 360 Wh
- Phone Charging × 10W × 3 hours = 30 Wh
Total: Approximately 6,700 Wh per day (6.7 kWh)
This is a typical load for a small family home running essential appliances during load shedding periods.
Step 3: Determine Your IPS Capacity Need
Your IPS capacity needs to handle two things:
1. Simultaneous Peak Load
Calculate the maximum power draw at any single moment. For example, if you run 2 fans (140W) + 4 lights (72W) + TV (50W) + laptop (60W) simultaneously, your peak load is approximately 322W.
Important: Motors in fans, refrigerators, and pumps require 2-3x their rated power to start. This “surge wattage” matters for IPS sizing.
2. Battery Backup Duration
Your battery capacity (measured in watt-hours or Ah) determines how long your IPS can run during outages. Use this formula:
Battery Capacity Required = Daily Consumption ÷ IPS Efficiency
Assuming 85% IPS efficiency and 6.7 kWh daily consumption: 6,700 Wh ÷ 0.85 = 7,882 Wh minimum
Step 4: Match Your Calculation to the Right HiTHIUM Product
Based on your load calculation, here are the recommended HiTHIUM solutions:
For Small Homes (500-1000W Peak Load)
If your calculation shows a peak load under 500W and you primarily need backup for fans, lights, TV, and phone charging:
- HiTHIUM HeroEE 1 — 1kWh capacity, 200W output, BDT 42,800. Perfect for essential backup.
- HiTHIUM HeroEE Light 1 — 1004.8Wh capacity, 500W output, BDT 48,000-57,800. Ideal for study rooms and small apartments.
For Medium Homes (1000-2000W Peak Load)
If you need to run a refrigerator, multiple fans, lights, TV, and possibly a water pump:
- HiTHIUM HeroEE 2 — 2kWh capacity, 1000W output, BDT 88,600. Great for entire home backup.
- HiTHIUM L12314ES — 4019Wh capacity, expandable, BDT 84,600. Best value for growing families.
For Large Homes & Offices (2000W+ Peak Load)
If you need to run air conditioners, multiple refrigerators, or office equipment:
- HiTHIUM MaxPower 8 AIO — 8kWh capacity, all-in-one solution, BDT 322,150. Complete home energy storage.
- HiTHIUM HeroEE 16 — 16kWh capacity, BDT 380,300. Commercial-grade backup for large spaces.
Step 5: Account for Solar Charging
In Bangladesh, pairing your IPS with solar panels maximizes your backup time and minimizes electricity bills. Here’s what to consider:
- Basic Setup: A 200W solar panel like the HiTHIUM HC200 (BDT 24,500) can charge most portable IPS units in 4-6 hours of good sunlight.
- Extended Backup: For larger systems like the HeroEE 2 or L12314ES, consider 400-800W solar arrays for full-day charging.
- Off-Grid Ready: The MaxPower 8 AIO is designed specifically for solar integration, making it ideal for off-grid homes.
Quick Reference: IPS Sizing by Room Type
| Room/Use Case | Peak Load | Recommended IPS |
|---|---|---|
| Single study room (fan + light + laptop) | 200-300W | HeroEE 1 or HeroEE Light 1 |
| Small bedroom (2 fans + lights + TV) | 400-600W | HeroEE Light 1 |
| Full living room (multiple appliances) | 800-1200W | HeroEE 2 |
| Entire small home (essentials) | 1000-1500W | HeroEE 2 or L12314ES |
| Large home with fridge + AC | 2000W+ | MaxPower 8 AIO |
Frequently Asked Questions
How do I know if my IPS is oversized or undersized?
If your IPS runs at 100% capacity immediately after switching to backup, it’s likely undersized. If it rarely exceeds 30% load, you may have overscaled. Aim for 60-70% typical load during backup for optimal efficiency.
Can I add more batteries later?
Yes! Products like the L12314ES support parallel expansion. You can start with one 4kWh unit and add up to 4 more later as your needs grow.
What’s the difference between VA and Wh?
VA (Volt-Ampere) measures apparent power, while Wh (Watt-hour) measures actual energy storage. For IPS purchasing, focus on Wh for backup duration and watts for simultaneous load capacity.
Do I need a larger IPS for starting motors?
Yes. Refrigerators, water pumps, and fans have startup surges 2-3x their running wattage. Your IPS should handle these surges without shutting down. The HeroEE series includes soft-start technology to manage this.
How accurate are online IPS calculators?
Online calculators give rough estimates. For accurate sizing, manually calculate based on your actual appliances and usage patterns. Our step-by-step guide above gives you precise control over the calculation.
Get Expert Help with Your IPS Calculation
Still unsure about your IPS load requirements? Visit our showroom in Dhaka or contact our team for a free consultation. We’ll help you calculate your exact needs and recommend the perfect HiTHIUM solution for your home or business.
Contact us: Call +8801788-686788 for immediate assistance or visit our Banani showroom for hands-on product demonstrations.
