Load shedding in Bangladesh isn’t just an inconvenience; it’s a business killer. When the power cuts in the middle of a shift, machines stop, workers sit idle, and production targets are missed. In Dhaka or Chittagong, a single hour of downtime can cost thousands of Taka. While a small petrol generator might keep a few fans spinning, it cannot support an elevator, a water pump, or a factory floor. For that, you need the heavy lifting power of a diesel generator.
I have spent years consulting on industrial machinery across Bangladesh. I have seen factory owners in Nawabpur get talked into buying “cheap” generators that fail within months. The market is flooded with fake stickers and smooth-talking sellers. To protect your investment, you need facts, not just sales pitches.
This guide breaks down the 10 key factors you must consider before buying a diesel generator in Bangladesh, designed to help you make a smart, profitable decision for your business in 2025.
Buying a diesel generator is a major financial commitment. Unlike a portable petrol unit, this is long-term infrastructure. Here is exactly what you need to check to ensure you get a machine that lasts.
1. Know Your Power Needs (KVA vs. KW)
The most common mistake buyers make is guessing their load. You cannot just say, “I have a 5-story building.” You need precise numbers.
How to Calculate:
List every piece of equipment you plan to run during a power cut. Note their wattage.
- Lights & Fans: Low load.
- ACs & Lifts: High load (and high starting current).
- Pumps & Motors: Very high load.
The KVA Trap:
Generators are sold in KVA (Kilovolt-Amperes), but your bill is in KW (Kilowatts). They are not the same.
- Formula: Real Power (KW) = KVA × 0.8 (Power Factor).
- Example: A 100 KVA generator actually provides 80 KW of usable power.
Pro Tip: Always buy 20% extra capacity. If your total load is 80 KW, do not buy a 100 KVA machine. Buy 110 KVA or 125 KVA. Running a diesel engine at 100% capacity constantly will shorten its life.
2. Engine Brand Matters
The engine is the heart of the system. In Bangladesh, three categories of brands dominate the market. Your choice depends on your budget and usage intensity.
| Brand Tier | Common Names | Best For | Estimated Price (30 KVA) |
| Premium | Perkins (UK/USA), Cummins (USA) | 24/7 Running, Factories, Hospitals | 12 – 15 Lakh BDT |
| Mid-Range | Ricardo (China), Lovol | Standby Power, Offices, Residential | 3.5 – 4.5 Lakh BDT |
| Budget | Generic Chinese Brands | Occasional use, Low budget | 2.5 – 3 Lakh BDT |
My Advice: If your factory runs 12 hours a day on a generator, buy Perkins or Cummins. If you only need it for 1-2 hours of load shedding, Ricardo is a solid, cost-effective choice.
3. Silent vs. Open Type
Diesel engines are loud. An open-type generator sounds like a tractor revving in your living room.
- Open Type: These have no cover. They are cheaper and easier to repair because the engine is accessible. However, the noise is deafening (over 100 dB). Use these only for industrial zones away from houses.
- Silent Type (Canopy): These come in a soundproof metal box (canopy). It reduces noise to about 75 dB—similar to a busy street.
- Cost Factor: A canopy adds 50,000 to 1,00,000 BDT to the price.
- Recommendation: For residential areas like Dhanmondi, Gulshan, or Uttara, a silent canopy is mandatory to avoid complaints from neighbors.
4. Fuel Consumption
Diesel is expensive. An inefficient generator is a hole in your pocket.
Ask the seller for the specific Fuel Consumption Chart for that model. Do not accept vague answers like “It uses very little oil.”
- Standard Efficiency: A good diesel engine uses approximately 0.2 liters per KVA per hour at full load.
- Real World Math: A 100 KVA generator will consume about 18-20 liters of diesel per hour.
If a seller claims their 100 KVA machine uses only 10 liters, they are likely lying, or the machine is underpowered.
5. Cooling System: Air vs. Water
Bangladesh is hot. During April and May, temperatures soar. A generator creates massive internal heat.
- Air-Cooled: Fine for small units (under 15 KVA). They use fans.
- Water-Cooled: Essential for anything above 20 KVA. These use a radiator and coolant, just like a car.
- Why it matters: A water-cooled engine can run for 8-10 hours straight without overheating. An air-cooled one might overheat after 4 hours in our summer weather.
6. Original vs. Copy (The “China” Factor)
This is the darkest part of the market. Walk through Nawabpur, and you will see “UK Design” stickers everywhere.
The Reality: “UK Design” usually means “Made in China.”
- Fake Stickers: Unscrupulous sellers put “Perkins” stickers on generic Chinese engines.
- How to Verify:
- Look for the serial number stamped into the metal of the engine block.
- Ask for the Certificate of Origin.
- Check the casting quality. Original engines have smooth metal finishes; copies often have rough, uneven surfaces.
7. Spare Parts Availability
A generator is a machine; it will eventually need repairs.
- The “Orphan” Risk: If you buy a rare brand because it was 50,000 Taka cheaper, you might find that no shop sells its air filter or piston rings.
- Safe Bet: Stick to Perkins, Cummins, or Ricardo. Every mechanic in Dhaka knows how to fix these, and parts are available in every hardware market.
8. Warranty and After-Sales Service
A warranty on paper is useless if the seller has no technicians.
Questions to Ask:
- “Do you have your own service team, or do you hire freelancers?”
- “What is the response time if my machine fails?”
- “Does the warranty cover parts, or just service?”
Standard Warranty: Look for 1 year or 1000 running hours, whichever comes first. Avoid sellers who offer less than this.
9. The Automatic Transfer Switch (ATS)
Do you want to run downstairs with a torch to pull a lever every time the power goes out?
An ATS (Automatic Transfer Switch) automates this.
- Senses Power Failure: When the grid goes down, the ATS signals the generator.
- Auto Start: The generator starts automatically within 10-15 seconds.
- Auto Stop: When grid power returns, it shuts down the generator.
Verdict: For offices and luxury apartments, an ATS is worth the extra cost (approx. 20,000 – 50,000 BDT depending on size).
10. Installation and Hidden Costs
The price you negotiate is rarely the final price. Budget for the “hidden” extras.
- Transport: Moving a 1.5-ton machine requires a crane and a truck.
- Civil Work: You need a concrete foundation (pad) to absorb vibration.
- Cabling: You need thick, expensive copper cables to connect the generator to your main distribution board (MDB).
- Earthing: Proper grounding is critical for safety.
Budget Tip: Keep an extra 10-15% of the generator’s price aside for installation costs.
How long can a diesel generator run continuously?
A “Prime Rated” diesel generator is designed to run 24/7. However, you must shut it down occasionally to check oil levels. For standby units (like Ricardo), it is best to rest them for 1 hour after every 8-10 hours of continuous running.
Is a diesel generator better than a petrol one?
Yes, for industrial use. Diesel engines produce higher torque and are built with heavier components. They last significantly longer (20,000+ hours) compared to petrol engines (2,000-3,000 hours). Diesel is also safer to store than highly flammable petrol.
What is the price of a 30 KVA generator in Bangladesh?
- Ricardo (China): Approx. 3.8 to 4.5 Lakh BDT.
- Perkins (UK): Approx. 12 to 14 Lakh BDT.
- Cummins (USA): Approx. 9 to 11 Lakh BDT.
(Prices vary based on canopy, ATS, and market conditions).
Final Thoughts
Buying a diesel generator is not just about spending money; it is about buying reliability. A cheap generator that fails when you have a shipment deadline is more expensive than a premium one that works every time.
My Final Recommendation:
- Calculate your load accurately (KW vs KVA).
- Choose a brand that matches your usage (Perkins for heavy use, Ricardo for backup).
- Inspect the unit personally for genuine parts.
- Ensure local service support is available.
Don’t let load shedding dictate your success. Invest wisely, and keep your business running smoothly.