Start With What You Need – Not What They Sell
Most people in Bangladesh either overspend on diesel generators or buy too small a unit to meet their needs. That’s like buying a truck to carry eggs—or a bicycle to tow a trailer. Neither ends well.
The most important step in choosing the right generator is knowing your power demand. Not guesses. Not what your neighbor says. Real numbers. And those numbers depend heavily on how you plan to use the generator—household, commercial, or industrial.
Let’s break it down.
1: Understanding Generator Capacity – In Simple Terms
Generator capacity is measured in kVA (kilovolt-amps). It’s the power the generator can supply. But here’s the twist—your devices use kW (kilowatts). To bridge that gap, remember this:
kW = kVA × power factor (usually around 0.8)
So a 10kVA generator gives about 8kW of usable power.
Why does this matter? Because a miscalculation can either:
- Burn your machines, or
- Leave you in the dark during peak load.
2: For Homes in Bangladesh – Quiet Strength Wins
🏠 Household Use (2kVA – 15kVA)
Most Bangladeshi homes use a diesel generator during load shedding, which—let’s be honest—is still very real in many areas.
What to power? Fans, lights, refrigerator, TV, router, and maybe a water pump.
Total Load: Usually between 1.5 kW to 6 kW depending on appliances.
👉 Recommended capacity: 5kVA – 10kVA (preferably with soundproof canopy)
Tip: Don’t just count devices. Add their wattage, then multiply by 1.3 to cover start-up surges (especially for fridges and pumps).
Best options:
- Perkins 7.5kVA (super quiet, durable)
- Ricardo 10kVA (budget-friendly with AVR support)
Remember: Overkill = fuel waste. Undersize = power failure.
3: For Small Businesses & Commercial Outlets – Think Load + Hours
🏪 Commercial Use (10kVA – 75kVA)
Shops, clinics, restaurants, office buildings—all need uninterrupted power. But the use varies.
Typical equipment:
- AC units
- Computers & servers
- POS systems
- Freezers or ovens (in restaurants)
Load range: 5kW to 50kW
👉 Recommended capacity: 15kVA – 63kVA, depending on floor size, load type, and operation hours.
Tip: Consider fuel efficiency, low noise, and load handling ability during surge.
Smart Picks:
- Cummins 33kVA (great for offices and clinics)
- Perkins 50kVA (silent, powerful, long-life)
- Lovol 20kVA (mid-tier, low maintenance)
Bonus Advice:
Always choose 3-phase output if your business runs industrial-grade or multiple AC units.
4: For Industries – Power Meets Strategy
🏭 Industrial Use (100kVA – 1000kVA and beyond)
This is serious territory. Industrial zones like Gazipur, Narayanganj, or Savar need constant, reliable, high-capacity diesel generators.
Common users:
- Textile and spinning mills
- Packaging plants
- Printing presses
- Agro-industries
Typical Load: Starts at 70kW and goes over 800kW
👉 Recommended capacity: 125kVA to 1000kVA, based on machine load, peak demand, and runtime.
You must consider:
- Fuel tank size (minimum 8-10 hrs runtime)
- AMF panel (Auto Start/Stop during grid failure)
- Synchronization panel if you’re running multiple generators
- Backup generator in mission-critical applications
Top Brands for Industrial Use:
- Cummins 500kVA (top-tier performance)
- Perkins 250kVA (dependable with global support)
- Ricardo 200kVA (cost-effective, easy to maintain)
Caution: Don’t rely on “factory recommendation” alone. Do a load audit with a professional before investing.
5: Bonus – When Portability or Rental Makes Sense
There’s a rising demand for portable generators in farms, construction sites, or temporary events in Bangladesh.
Capacity range: 2.5kVA to 15kVA
Features to look for:
- Trolley wheels
- Diesel efficiency
- Easy start
- Weather protection
For rental needs?
Choose a generator 20% higher than your peak load. Most rental companies in Dhaka and Chattogram offer generators between 15kVA – 250kVA with delivery.
6: Diesel Generator Selection Checklist
Before you spend a single taka, ask these 7 questions:
- What’s my total connected load in kW?
- What’s the peak load at any time?
- Do I need single-phase or three-phase output?
- How many hours/day will it run?
- Is fuel efficiency or noise more important to me?
- Do I have space for installation and ventilation?
- What brand has local service support in my area?
If you can answer these, your choice becomes simple. If you can’t—talk to someone who can.
7: Conclusion – Match Capacity with Reality, Not Assumptions
Choosing the right diesel generator capacity in Bangladesh is not about going big or cheap—it’s about going right.
Most important, this decision impacts your daily life or business. A wrong-size generator can choke your operations or drain your budget. So take your time. Understand your load. Buy for your actual demand, not for some flashy brand name.
The market is wide—from Perkins to Cummins to Ricardo, from 5kVA to 1000kVA—but your needs are unique. Respect them, and your generator will return the favor for years to come.
