How do I size a diesel generator correctly?
Calculate the total running load in kW or kVA, then add a 20–25% safety margin for motor startup surges. A professional load assessment from MHS ensures right-sizing—avoiding both costly undersizing and wasteful oversizing.
What is the difference between kVA and kW?
kVA represents apparent power, while kW represents usable power after accounting for the power factor, typically 0.8. As a general guide, multiply the kVA rating by 0.8 to estimate the available kW output.
How long can an industrial diesel generator run?
Industrial units run continuously with regular servicing and refueling. Prime-rated units handle unlimited hours; standby units suit emergency backup only. Mismatching usage togenerator class shortens engine life significantly.
What is the difference between standby, prime, and continuous ratings?
Standby generators provide emergency backup forshort outages. Prime-rated units deliver unlimited hours at variable load.Continuous-rated units handle steady, unchanging loads around the clock.
How often should a diesel generator be serviced?
Daily visual checks are essential. Oil and filter changes occur every 250–500 hours, with annual full servicing (or per manufacturer schedule, whichever comes first). MHS handles all scheduled maintenance on rental units—maintenance is included in your rentalrate.
Can diesel generators run on biodiesel?
Many modern generators can operate on biodiesel blends such as B5 and, in some cases, up to B20. However, always verify compatibility with the engine manufacturer, as fuel requirements and warranty conditions may vary by model.
How loud are diesel generators?
Open-frame units: 85–100+ dB(A) at 1 meter. Acoustic or silent enclosures reduce this to 65–75 dB(A). Critical for hospitals, events, or residential areas. MHS supplies enclosed units for noise-sensitive sites.
What is typical fuel consumption?
A 100 kVA generator operating at 75% load typically consumes around 15–20 litres of fuel per hour, though actual consumption may vary by generator model, engine efficiency, and load conditions. Always refer to the manufacturer’s datasheet for accurate fuel consumption figures.
Do I need an Automatic Transfer Switch?
For backup power applications, yes. An ATS automatically switches load from mains to generator during outages and back when power restores—no manual intervention needed. Essential for continuous operations.
What emission standards apply?
Standby generators provide emergency backup forshort outages. Prime-rated units deliver unlimited hours at variable load.Continuous-rated units handle steady, unchanging loads around the clock.
Can generators be paralleled for larger loads?
Yes. Multiple generators can be synchronized through control panels to meet higher power demands or provide redundancy. MHS can deploy multi-generator setups for large-scale projects requiring reliable and continuous power.
Where should a diesel generator be installed?
Level, well-ventilated ground away from combustibles, with adequate clearance for maintenance and airflow. Poor clearance causes overheating and reduces equipment life.
How long does a diesel generator last?
With regular maintenance, generators can typically achieve 20,000–30,000+ running hours before a major overhaul, depending on usage patterns, load consistency, operating conditions, and maintenance quality.
Should I rent or buy a generator?
A rental option is always better; it avoids capital outlay, maintenance costs, storage, and operator training. MHS handles maintenance, servicing, spare parts, and emergency replacement—included in your rental rate.
What are the critical safety precautions?
Proper grounding, adequate ventilation, regular fuel and coolant checks, and keeping the generator away from flammable materials are essential for safe operation. Never refuel a running generator.









