Generator Sets · 4BT3.9

Cummins 4BT3.9-G2 36KW 45KVA Generator

Name: Cummins 4BT3.9-G2 36KW 45KVA Generator
Brand: Cummins
SKU: 4BT3.9-G1
Availability: InStock

Cummins 4BT3.9-G1 diesel generator set rated 45 kVA at 1500 rpm with 3.9L displacement for prime and standby power on site.

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Cummins 4BT3.9-G2 36KW 45KVA Generator

Cummins 4BT3.9-G2 36KW 45KVA Generator packaged generator set

Cummins 4BT3.9-G2 36KW 45KVA Generator shown from another angle

Overview

What This Engine Is Built For

The Cummins 4BT3.9-G1 is a 4-cylinder diesel generator set of 3.9L with a 102×120 mm bore and stroke supplied by MEP Power as a complete assembly. It is rated at 45 kVA at 1500 rpm. The engine is turbocharged and water cooled. Typical duty is prime and standby power on site.

ModelHY-G30

Rated power36kw/45kva

Displacement3.9L

AspirationTurbocharged

Key Benefits

Delivers 45 kVA at 1500 rpm from 3.9L as a factory-rated assembly.
Turbocharged induction with water cooling keeps charge temperature under control in continuous duty.
Published fuel consumption of 210 L/hr makes running cost predictable.
Output 400/230V at 50HZ as supplied, matched at the factory.
Backed by a written warranty of one year or 1000 hours, whichever comes first
Genuine and OEM options quoted side by side so the budget decides, not the catalogue

Application Scenarios

Factory standby power
Data centre and hospital backup
Off-grid site and mine power
Rental power package

Who It Is For

Factories and processing plants needing standby power for the whole site
Hospitals, data centres and office buildings with critical loads
Construction sites and mines working off-grid
Contractors supplying rental power packages

Problems It Solves

An outage costs more per hour than the set itself.
Sets assembled from mismatched parts never reach their rated output.
Remote sites cannot wait weeks for a spare part to be identified.
Identifying the right 4BT3.9-G1 variant from a serial number takes experience; MEP Power checks the configuration before quoting.

Technical data

Specification As Published

Values below are the published data for this unit. Where a figure is not listed it was not stated by the source data sheet; ask and we will confirm before you order.

Generator Set Model	HY-G30
Prime Power	36kw/45kva
Standby Power	33kw/42kva
Output Voltage	400/230V
Frequency	50HZ
Rated Current	59A
Rated Speed	1500
Power Factor	COSΦ=0.8(lagging)
Fuel Consumption	210 L/hr
Battery Rated Capacity	100AH 2PCS
Engine Model	4BT3.9-G1 Cylinder NO. 4 Cylinders in-line
Bore x Stroke	102×120
Displacement	3.9L
Exhaust Temperature	380
Lubricating Oil Capacity	10.9 L Liquid cooling capacity(L) 18.47 L
Oil Consumption	0.3 g/kW.h
Aspiration	Turbocharged
Starting System	Electrical start (24V)
Cooling System	water cooling
Governor Type	Machanical Control
Brand	HY
Model	HY-G30
Rated Capacity	30kw/38kva
Enclosure Rating	IP22
Insulation Class	H
Number of Cylinders	4 cylinders

Technical Features

Displacement: 3.9L
Bore and stroke: 102×120
Aspiration: Turbocharged
Governor: Machanical Control
Starting system: Electrical start (24V)

Quality Control

Every engine is inspected by the MEP Power inspection team before it leaves the warehouse
Engine, configuration and serial numbers are recorded and photographed for the buyer
Genuine and OEM units are quoted separately so the buyer knows exactly what is supplied
Warranty on genuine and OEM new engines and generator sets is one year or 1000 hours, whichever comes first; parts and repair labour are covered for quality faults inside that period.

Use and Installation Guide

Quote the model 4BT3.9-G1 when ordering so the correct variant is supplied.
Confirm voltage, frequency and connection type before shipment
Allow for ventilation and exhaust routing in the plant room
Exercise standby sets under load at regular intervals
Keep the warranty terms in mind: one year or 1000 hours, whichever comes first.

Customisation Options

OEM and ODM builds, including your logo and company name on the unit
Cummins engine customisation and modification to your requirement
Mining and special explosion-proof builds
Genuine or OEM parts specified on the quotation

How It Compares

Compared with	What to consider
A rebuilt or used engine of the same rating	A rebuilt unit may show the same 45 kVA on paper, but its running history is unknown and the warranty rarely covers the whole engine.
A larger engine in the same 4BT3.9 range	Moving up a frame size adds weight, envelope and fuel burn; specify the next size up only if the duty cycle really needs the headroom.
A non-Cummins engine of similar output	Parts and service for Cummins families are available in most markets, which matters more over ten years than the purchase price on day one.

Questions

4BT3.9-G1 Questions

Is this 4BT3.9-G1 a genuine Cummins engine

MEP Power supplies 100% genuine Cummins engines, generator sets and engine parts, plus OEM units and customised builds. Tell us which you need and the quotation will state clearly whether the unit offered is genuine, OEM or a customised build.

What power does the 4BT3.9-G1 produce

The rating supplied is 45 kVA at 1500 rpm.

Can the set be supplied for my voltage and frequency

As listed the output is 400/230V at 50HZ. Confirm the voltage, frequency and connection type with your enquiry and the set will be built and tested to match.

What warranty comes with the engine

New genuine and OEM engines and generator sets carry one year or 1000 hours, whichever comes first. Inside that period MEP Power supplies replacement parts free of charge and covers the cost of the engine repair for quality faults.

How do I confirm this is the right variant for my machine

Send the engine serial number or the nameplate photograph of the unit being replaced. MEP Power checks it against the 4BT3.9-G1 configuration before quoting.

How is the engine shipped and what payment terms apply

Shipment is by sea, air or express depending on size and urgency, arranged by MEP Power or by your own forwarder. Payment terms are Alipay, WeChat, T/T or L/C.