Home > Products > Engine Driven Welders > 20kW 25kVA 400A Diesel Welding Generator

20kW 25kVA 400A Diesel Welding Generator

DB-400A 20kW 25kVA diesel welding generator is a dual‑purpose industrial unit that provides stable welding performance and reliable auxiliary power. It offers 40–400A adjustable welding current, supports manual/ARC welding, and comes with 20KW 380V auxiliary power output. Powered by a 4‑cylinder water‑cooled diesel engine, it features electric start, 70L large fuel tank, low noise, and compact structure, making it widely used for construction sites, engineering, pipeline welding, and on‑site emergency power supply.

Welding type: msnual/ARC welding

No. load voltage(V): 60-70

Welding voltage(V): 22-28

Welding current(A): 40-400

Load continuous rate: 60%

Engine type: 4 cylinder, water-cooled, direct injection

displacement(L): 2.3

For more types, please contact us.

Inquire Now Download Datasheet

Introduction Advantage Technical Parameters 500A 600A

The DB-400A 20kW diesel welding generator is a rugged, all-in-one power solution built for demanding field work. It delivers a 40–400A adjustable welding current, supporting stable ARC welding for various materials, while also providing a 20kW auxiliary power output to run tools and equipment on site. Powered by a reliable 4-cylinder water-cooled diesel engine, the unit ensures consistent performance, low fuel consumption, and long continuous operation, with a large fuel tank for extended work hours. Designed with a compact frame, low noise operation, and built-in safety protections, it is easy to transport and use in construction sites, pipeline projects, remote engineering works, and emergency maintenance scenarios.

Why Choose Us

Dingbo is original manufacturer of diesel generator set. Factory direct sale, guaranteed quality and affordable price.

Our diesel generator sets are widely used in telecommunications, energy, transportation, real estate, hospital, residential building, data center and other fields, having long-term strategic cooperation with a lot of well-known enterprises. From research and development to production, from raw material procurement, assembly and processing to finished product debugging and testing, each process is strictly implemented, in all aspects meet the national, industry standards and contract provisions of the quality, specifications and performance requirements.

We have a professional and technical team, with an average working experience of more than 10 years in the generator industry. In the spirit of "keep improving", they actively collect and attract advanced technology and products at home and abroad, and constantly update the products, so that our diesel generators have been recognized by the majority of users.

If a customer can not find his supplier to support them when equipment has problem, after sales service is not guaranteed, which is a very helpless thing. While we have perfect after-sales service to support you to solve problem, it's not that you can't find us after you have a problem on your equipment. We will be with you and solve your problems with heart.

Export Case

So far, our diesel genset sold to Ethiopia, Venezuela, Singapore, Nigeria, Thailand, U.S.A etc. all over the world, both having good feedback from customers.

Diesel generators

Specific Project Cases:

https://www.dbdieselgenerator.com/project-case/

FAQ

1. Do you have your own factory?

Yes, we have. Welcome to visit our factory.

2. What is the delivery time and do you have product in stock?

Delivery time depends on order quantity. Generally, within 10 days for open genset, 20 days for silent genset. We have some power capacities in stock, if need details, please contact us.

3. What is your warranty period?

Our warranty is 1 year or 1000running hours whichever comes first. But based on some special project, we can extended our warranty period.

4. Does your generator have global warranty?

Yes, We supply the warranty. Also most of our products like Cummins, Volvo, Perkins, Deutz, Doosan, Yuchai, Weichai etc. power generator enjoy the global warranty service. And the alternator we use like Stamford and marathon also enjoy the global warranty service, so you do not need to worry about the after-sales service.

5. What is your payment terms?

We can accept T/T 30% in advance, and the balance 70% shall be paid before shipment or L/C at sight. But based on some special project and special order, we can do something on payment item.

6. Do you provide OEM service?

Yes, we can put your company logo on our diesel genset, just tell us your requirements, then we will do it for you.

Our Service

Before service

Our professional engineer will give you some consultation of technology and related planning before sale, such as selection of equipment, supporting facilities, the design of equipment room. We can also answer and solve the using problem you faced.

After sale service

1. Free guide to install and debugging

2. Free training and consult

3. Guiding how to protect your equipment

4. We will set up clients' document, tracking service, regular inspection, maintenance for life

5. We offers pure perennial spare parts and maintenance engineers will be ready to provide.

Dingbo Cloud on line service will help you to manage your equipment, save cost and improve efficiency.

The advantages of DB-400A 25kVA diesel welding generator:

Dual-function Design:
Combines 40-400A adjustable welding output with 20kW auxiliary power supply, enabling both welding and power generation in one unit for maximum site efficiency.
Reliable Diesel Power:
Equipped with a 4-cylinder water-cooled diesel engine, delivering strong power, low fuel consumption, and long continuous operation for demanding field conditions.
Versatile Welding Performance:
Supports stable ARC welding across a wide current range, suitable for various welding tasks and materials in construction, pipeline, and engineering projects.
Field-ready Durability:
Built with a rugged, compact frame, low-noise operation, and safety protections, ensuring reliable performance even in harsh outdoor environments.
Low Maintenance & Cost-effective:
High-quality components and a simple, durable design minimize upkeep requirements, reducing long-term operational costs and downtime.

Welder	Welding Type	Manual/ARC welding
	No Load Voltage (V)	60-70
	Welding Voltage (V)	22-28
	Welding Current (A)	40-400
	Load Continuous Rate	60%
	Auxiliary Power	AC380V/20KW
Engine	Engine Model	WP2.3D25E200
	Engine Type	4Cylinder, Water-cooled, Direct Injection
	Bore*Stroke (MM)	89*92
	Displacement（L)	2.3
	Start Type	Electric 电启动
	Oil Capacity (L)	8
Generator	Fuel Tank Capacity (L)	70
	Noise Level (dBA/7m)	75
	Size 尺寸	16808201010
	Weight (KG)	680

500A Diesel Welding Generator
Model No.		DB-500A
Welder	Welding Type	Manual/ARC welding
	No Load Voltage (V)	60-70
	Welding Voltage (V)	22-28
	Welding Current (A)	40-500
	Load Continuous Rate	60%
	Auxiliary Power	AC380V/30KW
Engine	Engine Model	WP2.3D33E200
	Engine Type	4Cylinder, Water-cooled, Direct Injection
	Bore*Stroke (MM)	89*92
	Displacement （L)	2.3
	Start Type	Electric 电启动
	Oil Capacity (L)	8
Generator	Fuel Tank Capacity (L)	70
	Noise Level (dBA/7m)	75
	Size 尺寸	16808201010
	Weight (KG) 重量	700

Model No.		DB-600A
Welder	Welding Type	Manual/ARC welding
	No Load Voltage (V)	60-70
	Welding Voltage (V)	22-28
	Welding Current (A)	40-600
	Load Continuous Rate	60%
	Auxiliary Power	AC380V/50KW
Engine	Engine Model	WP4.1D66E200
	Engine Type	4Cylinder, Water-cooled, Direct Injection
	Bore*Stroke (MM)	105*118
	Displacement （L)	4.1
	Start Type	Electric
	Oil Capacity (L)	13
Generator	Fuel Tank Capacity (L)	100
	Noise Level (dBA/7m)	75
	Size 尺寸	18009001300
	Weight (KG)	850