50Hz 24kW 30kVA SDEC Engine 4Z3.2-G21 Diesel Generator set

50Hz 24kW 30kVA SDEC Engine 4Z3.2-G21 Diesel Generator set

1. Product Overview

The 50Hz 24kW 30kVA SDEC Engine 4Z3.2-G21 Diesel Generator set is a reliable and cost-effective medium-small power generation unit widely deployed for prime continuous power supply and emergency standby power solutions across residential, commercial, light industrial and outdoor engineering sectors. Powered by genuine industrial-grade SDEC 4Z3.2-G21 diesel engine, this 30kVA diesel generator delivers a steady prime power output of 24kW and a maximum standby emergency power of 26.4kW/33kVA, perfectly matching conventional small and medium load power demands. With an optimized full-load fuel consumption of only 7.9L per hour, this SDEC diesel generator achieves a perfect balance of low fuel consumption, stable operation and long-term durability, standing out among mainstream 30kVA-class diesel generator sets.

Equipped with a high-performance brushless self-excited alternator, the unit adopts premium H-grade insulation material and standard IP23 dustproof and splash-proof protection grade, enabling stable operation in outdoor open-air, semi-outdoor, dusty and humid working environments. Designed with standard 50Hz industrial frequency and 400V three-phase four-wire output, this 24kW prime power diesel generator fully complies with global civil and industrial power supply standards. Upgraded with SDEC mature 4Z3.2-G21 four-stroke water-cooled direct injection combustion technology, it effectively overcomes common drawbacks of traditional small gensets such as high fuel waste, unstable voltage frequency and frequent maintenance failures. It serves as an ideal long-term power guarantee solution for off-grid power generation, municipal power failure backup and industrial peak load compensation projects.

Every finished 4Z3.2-G21 SDEC generator set undergoes strict factory full-load aging testing, voltage and frequency stability calibration, insulation performance detection and fuel consumption verification before delivery. With standardized industrial assembly process, robust mechanical structure and ultra-low operational failure rate, this energy-saving diesel genset has become a hot-selling model for construction sites, public infrastructure, small manufacturing workshops and residential community standby power projects worldwide.

2.  Technical Parameter

3. Core Product Features

This 50Hz 24kW 30kVA SDEC 4Z3.2-G21 Diesel Generator set adopts upgraded G21-series optimized engine technology and high-efficiency brushless alternator matching design, effectively improving the energy-saving performance and operational stability of traditional medium-small power gensets. With low fuel consumption, low maintenance cost, stable power output and strong environmental adaptability, it has become a highly cost-effective power generation solution for various civil and industrial medium-load scenarios:

3.1 Optimized G21 Engine & Ultra-low Fuel Consumption

Powered by the upgraded dedicated SDEC 4Z3.2-G21 generator diesel engine, the unit adopts precision direct injection fuel supply system and optimized combustion chamber structure. It greatly improves fuel atomization efficiency and combustion utilization rate, reducing invalid fuel loss during full-load operation. The measured full-load fuel consumption is only 7.9L/h, which is significantly more energy-saving than most conventional 30kVA diesel generator sets on the market. Whether for long-term continuous prime power operation or frequent standby startup, this energy-saving SDEC diesel generator can effectively reduce daily operational fuel costs and create long-term economic benefits for users.

3.2 Brushless Self-excited Design & Maintenance-free Operation

Different from traditional brushed alternators that require regular carbon brush replacement and routine mechanical maintenance, this 30kVA diesel generator is equipped with a mature brushless self-excited alternator structure. It completely eliminates carbon brush wear, electric spark interference and mechanical failure risks caused by friction operation. The integrated pure copper winding features low resistance and low heat generation, ensuring stable power transmission and long service life. The maintenance-free alternator design greatly reduces daily maintenance workload and after-sales failure rate, perfectly adapting to long-term unattended standby power operation requirements.

3.3 H-grade High-temperature Insulation & IP23 Harsh Environment Resistance

The alternator applies high-standard H-grade high-temperature resistant insulation materials, which has excellent anti-aging, heat-resistance and electrical breakdown resistance capabilities. It can maintain stable insulation performance under long-term high-load and high-temperature working conditions, avoiding insulation failure and equipment burnout. With standard IP23 professional protection grade, the whole machine can effectively block splashing rainwater, floating dust and external sundries, preventing internal circuit short circuit and component damage. This reliable protection structure enables the genset to operate stably in open-air construction sites, suburban outdoor stations, humid and dusty field environments.

3.4 Dual Power Mode & High-precision Stable Power Quality

The genset supports dual power output modes to meet diverse load demands. The 24kW rated prime power supports 24-hour uninterrupted continuous power supply for conventional stable loads, while the 26.4kW/33kVA emergency standby power can cope with instantaneous peak load surge and sudden municipal power outage emergencies. Built-in high-precision AVR automatic voltage regulation system precisely controls voltage fluctuation within ±1% and frequency deviation within ±0.5%, providing clean and stable power for precision electronic equipment, building lighting systems and small mechanical devices without voltage surge or power jitter damage.

3.5 Robust Structure & Strong Continuous Operation Stability

The SDEC 4Z3.2-G21 engine adopts wet liner cylinder structure and four-stroke water-cooled circulating heat dissipation design, with uniform heat dissipation efficiency and strong continuous overload resistance. The optimized engine shock absorption and integral silencer system effectively reduce operating vibration and running noise, complying with civil and industrial environmental protection noise standards. The whole machine adopts compact integrated layout, with small footprint and convenient installation and mobile transfer, adapting to fixed indoor placement and temporary mobile outdoor engineering operation.

4. Core Product Uses

As a high-performance medium-small power diesel generation equipment, the 50Hz 24kW 30kVA SDEC 4Z3.2-G21 Diesel Generator set mainly undertakes continuous prime power supply, emergency standby power backup and grid peak load regulation tasks, solving power shortage and sudden power outage risks in various medium-load scenarios:

Long-term Continuous Prime Power Supply: This 24kW prime power diesel generator provides stable independent off-grid power generation for remote rural areas, field working stations and suburban facilities without municipal grid coverage, ensuring normal operation of daily living electrical equipment and small production machinery.

Sudden Power Outage Emergency Backup Power: The 33kVA high standby power can start quickly in response to municipal power failure, providing uninterrupted emergency power support for building monitoring systems, fire-fighting linkage equipment, emergency lighting circuits and weak current systems, avoiding production suspension and facility shutdown losses caused by sudden power cuts.

Grid Peak Load Compensation: For small factories, commercial venues and public facilities with insufficient grid peak power capacity and unstable voltage, this SDEC diesel generator set can assist in power supplementation during peak power consumption periods, balancing grid load pressure and improving regional power supply stability.

Fixed Hot Standby Power Reserve: It serves as standard standby power configuration for residential communities, institutional buildings and small commercial centers, maintaining long-term hot standby state to realize rapid response power supply in unexpected power failure emergencies.

Temporary Off-grid Engineering Power Guarantee: Provides reliable temporary power support for outdoor infrastructure construction, field maintenance and rural engineering renovation projects, meeting the power consumption demands of construction tools and on-site living facilities.

5. Wide Application Scenarios

With low fuel consumption, low maintenance cost, stable power output and strong environmental adaptability, the 50Hz 24kW 30kVA SDEC 4Z3.2-G21 Diesel Generator set covers multiple civil, commercial, light industrial and engineering scenarios, being a mainstream cost-effective power generation solution for medium-small load power demand:

5.1 Residential & Commercial Building Standby Power

Suitable for villa communities, small office buildings, neighborhood shopping centers and community service stations. It acts as core emergency backup power to ensure the normal operation of elevators, real-time monitoring systems, emergency lighting and fire linkage equipment during municipal power outages, effectively improving building power supply safety and resident living stability.

5.2 Small Factory & Light Industrial Power Supply

Widely used in small processing workshops, packaging factories, handicraft production workshops and rural micro manufacturing factories. The stable 24kW continuous power output fully meets daily production power demand, and the emergency standby power effectively copes with grid voltage fluctuation and sudden power failure, ensuring continuous and stable industrial production operation.

5.3 Outdoor Construction & Temporary Engineering Projects

Ideal for rural road reconstruction, water conservancy facility maintenance, field exploration and temporary construction sites. The IP23 outdoor protection performance adapts to open-air harsh environments such as dust, wind and splash rain, and the compact movable structure facilitates rapid on-site deployment, providing stable off-grid power guarantee for temporary engineering operations.

5.4 Public Facility & Institutional Power Guarantee

Applicable for township health centers, rural primary and secondary schools, scenic area supporting facilities and rural street lighting systems. The low-noise and energy-saving operation will not interfere with public working and living environments, and the low-maintenance design perfectly adapts to long-term unattended standby operation of public infrastructure.

5.5 Monitoring & Communication Equipment Backup

Perfect for small communication base stations, field environmental monitoring stations and remote detection equipment. The high-precision stable power output effectively protects precision electronic devices from damage caused by voltage surge and current fluctuation, ensuring 24-hour uninterrupted operation of monitoring and communication systems.

6. Frequently Asked Questions (FAQ)

Q1: What is the actual usage difference between prime power and standby power of the SDEC 4Z3.2-G21 diesel generator set?

Prime power (24kW/30kVA) refers to the rated continuous power that the genset can stably output for 24-hour long-term uninterrupted operation, which is designed for daily continuous off-grid power supply and conventional stable load operation. Standby power (26.4kW/33kVA) is emergency peak power, only used for short-time power compensation during sudden municipal power outages or instantaneous load surges, and cannot support long-term full-load continuous operation. In actual on-site use, it is recommended to control the daily operating load within 80% of the prime power to avoid long-term overload operation, which can effectively extend the overall service life of the 4Z3.2-G21 generator set.

Q2: What makes the 4Z3.2-G21 engine different and better for this 30kVA diesel generator?

The SDEC 4Z3.2-G21 is an upgraded generator-dedicated G21 series diesel engine developed by Shanghai Diesel Engine, specially optimized for medium-small power generation working conditions. Compared with ordinary general-purpose engines, it adopts an upgraded precise direct injection combustion system and optimized matching structure, achieving a lower full-load fuel consumption of 7.9L/h with higher power generation efficiency. Matched with a brushless pure copper alternator, the whole unit has lower operational loss, stronger continuous heat resistance and more stable power output. Its mature industrial-grade durability and low failure rate make it more suitable for long-term standby and frequent startup power generation scenarios than ordinary engine models.

Q3: What routine maintenance does the 50Hz 24kW 30kVA SDEC diesel generator set need?

Benefiting from the advanced brushless self-excited alternator design and mature SDEC 4Z3.2-G21 engine structure, this genset has extremely low daily maintenance pressure. Daily routine inspection only needs to check diesel fuel level, cooling water capacity and battery starting voltage to ensure normal standby state. Users need to regularly clean radiator dust and ventilation gaps to keep unobstructed heat dissipation. Replace engine oil, fuel filter and oil filter regularly according to cumulative operating hours. Different from traditional brushed generators, it requires no frequent carbon brush replacement and mechanical debugging, greatly saving daily operation and maintenance time and cost.