DLW400ESA4 Diesel-Powered Welder/Generator that delivers up to 400 amps of power
This CC (constant current) and CV (constant voltage) welder delivers up to 400 amps during single operation, or 200 amps to both outputs during dual operation. As a generator, this unit provides up to 14 kW of clean, 120/240 AC power. A digital panel display provides both amperage/voltage and troubleshooting information to the operator(s). Smart Stick, E-Mode, Arc Force are just some of the features of the DLW400ESA4 from Multiquip.
- Delivers up to 400 amps as a welder with the convenience of 14 kW of AC power as a generator
- Dual operator output ability
- Can draw simultaneous AC power while welding
- Amazing voltage regulation @ 1.5% (+/-)
- Tier 4 final Kubota diesel - Model D902
- Arc Force control allows the operator to fine tune DC current during low voltage welding conditions which helps in preventing electrodes froms sticking during short arc length welding
- Smooth arc characteristics and more consistent, quality weld penetration
- E-mode improves fuel efficiency by allowing one operator to weld up to 200 amps while the engine maintains idle speeds. Two operators can also use this feature when the total amperage between both outputs does not exceed 200 amps.
- Smart Stick function automatically shuts the engine down during periods of no load. The operator only needs to tap the welding rod to the grounded work for the engine to restart, making restarts while in the rafters or hanging from the side of a skyscraper a breeze.
- SMAW, FCAW, GMAW, GTAW and ACAC welding processes
- Sound attenuated cabinet reduces noise output to 68 dBA @ 23'
- Full panel GFCI protection - OSHA and NEC compliant
- Options - Wire remotes, welding cable, cable carriers, tool box, trailers and cold weather items are available for this model.
| DC Voltage | CC: Single 34V, Dual 27V V | CV: Single 35V, Dual 28V V |
| DC Current | CC: Single 400, Dual 200 A | CV: Single 400, Dual 200 A |
| Current Range | Single 30-400, Dual 30-200 A | |
|
Max Duty Cycle w/ Full Amps Availible |
100% @Single 350, Dual 175 A | |
| Welding Processes |
SMAW FCAW GMAW GTAW ACAC |
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| Fuel Tank Capacity | 11.1 gal | 42 L |
|
Fuel Consumption at Rated Load |
1.3 gph | |
|
AC Power Output (Single Phase) |
14 kW | |
| Cycle | 60 Hz | |
| Voltage | 120/240 V | |
| Amperage | 116/58 A | |
| Voltage Regulation | 1.5 % | |
| Receptacles |
NEMA 5-20R 125V GFCI 20A NEMA L5-30R 125V Twist-Lock 30A NEMA L6-30R 250V Twist-Lock 30A CS-6369 125/250VAC Twist-Lock 50A |
|
| Overall Length | 61 in | 1550 mm |
| Overall Width | 29 in | 737 mm |
| Overall Height | 35 in | 890 mm |
| Shipping Dimensions |
63 x 30 x 41 in 1600 x 762 x 1041 mm |
|
| Operating Weight | 1144 lb | 519 kg |
| Shipping Weight | 1027 lb | 466 kg |
The DLW400ESA4 Diesel-Powered Welder/Generator - Skid Mount stands out as one of the most powerful and versatile units available for industrial welding, heavy construction, infrastructure maintenance, and remote jobsite applications. This skid-mounted powerhouse is designed to deliver exceptional performance even in the toughest environments, with a feature set engineered to maximize productivity, safety, and reliability for professionals who demand the best in both welding and electrical generation.
Overview and Key Features
The DLW400ESA4 Diesel-Powered Welder/Generator delivers up to 400 amps of welding current for single-operator tasks or splits to support two operators at 200 amps each, making it ideal for busy job sites that require multi-operator capability. As a generator, it supplies a massive 14 kW of clean AC power at 120/240V, allowing users to run power tools, lights, compressors, and other essential equipment alongside welding operations without interruption.
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Dual-operator output: Up to 400 amps single or 200 amps dual; supports simultaneous welding by two operators or dual processes.
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14 kW generator power: Delivers reliable, stable electricity for jobsite tools and sensitive electronics with ±1.5% voltage regulation for minimal fluctuation.
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CC/CV welding modes: The DLW400ESA4 seamlessly switches between constant current and constant voltage processes to support SMAW (Stick), FCAW (Flux-cored), GMAW (MIG), GTAW (TIG), and ACAC (Air Carbon Arc Cutting).
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Tier 4 Final Kubota Diesel Engine: Equipped with the Kubota D902 series for supreme fuel efficiency, robust power, and ultra-low emissions, keeping the unit environmentally compliant in all locations.
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Digital panel display: Provides instant readout on amperage, voltage, and service indicators, streamlining setup and troubleshooting.
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E-Mode and Smart Stick: E-mode allows up to 200 amps at idle for quiet, efficient operation, while Smart Stick automatically shuts down the engine in periods of inactivity—restart is as simple as tapping the rod to the work, even from high locations or awkward positions.
Technical Specifications
Advanced Welding Performance
The DLW400ESA4 offers Arc Force control, ensuring smooth arc characteristics and superior penetration during tough conditions, such as low voltage or short-arc-length operation. The unit supports all major processes—stick, MIG, TIG, flux-cored, and air arc gouging—making it a flexible solution for steel construction, pipeline, bridgework, and heavy machinery repair.
Its dual-weld capability is a standout feature for crews needing maximum output and flexibility. Both operators can simultaneously weld different processes or projects, maximizing workflow on large-scale jobs without the need for additional machines.
Generator Power and Field Convenience
With 14 kW of generator power, this unit is not just a welder—it’s a mobile power station. Reliable voltage regulation ensures even sensitive electronics are protected, minimizing chances of surges or downtime due to inconsistent electrical supply.
Recommended AC receptacles include:
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NEMA 5-20R 125V GFCI (20A)
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NEMA L5-30R 125V Twist-Lock (30A)
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NEMA L6-30R 250V Twist-Lock (30A)
Fuel Efficiency and Emissions
The Kubota D902 Tier 4 Final diesel engine delivers minimal emissions, supreme fuel economy, and robust reliability. E-mode allows welding up to 200 amps at idle, significantly reducing fuel burn and operating noise—a major plus for operations in urban, remote, or sensitive environments.
Smart Stick technology further boosts efficiency—automatic shutdown during inactivity greatly extends run time between refuels and lowers overall costs.
Noise Attenuation and Safety
A fully sound-attenuated steel enclosure keeps operational noise to just 68–70 dBA at 23 feet, supporting compliance with OSHA and community standards for noise control. The full GFCI panel meets both OSHA and NEC workplace safety mandates, giving crews added protection against accidental shocks or equipment failures.
Skid Mount Versatility
The skid-mounted configuration offers maximum portability, durability, and security for trucks, trailers, or permanent installations. Reinforced mounting points, lifting eyes, and weather-resistant enclosures ensure the unit can be rapidly deployed and reliably operated in the harshest field or industrial conditions.
Applications
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Heavy construction and infrastructure repair
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Onsite fabrication and field welding
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Energy and utility maintenance
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Mining, pipeline, and resource sectors
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Disaster recovery and remote power needs
Options and Accessories
Fully custom options include:
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Wired remote controls
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Welding cable kits and carriers
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Toolboxes for cable/tool management
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Weather-protection covers
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Cold-weather starter kits
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Single- or dual-axle trailers (with extended fuel cells for all-day running)
Why Choose the DLW400ESA4 Diesel-Powered Welder/Generator - Skid Mount?
Professionals seeking the highest reliability, productivity, and flexibility for industrial welding and mobile power generation consistently choose the DLW400ESA4. Its dual-welder output, advanced process support, massive generator capacity, and fuel-sipping Kubota engine combine to offer unmatched ROI across projects large and small.
Final Thoughts
The DLW400ESA4 Diesel-Powered Welder/Generator - Skid Mount is the ultimate jobsite tool for industry leaders. From dual-weld productivity to 14 kW of pristine generator power, integrated safety systems, noise-attenuated enclosure, and customizable accessories, this model stands atop the category in power, reliability, and flexibility. For professionals serious about top-tier results, dependable uptime, and long-term value, the DLW400ESA4 is the clear investment.
This comprehensive, expertly structured guide ensures the keyword “DLW400ESA4 Diesel-Powered Welder/Generator - Skid Mount” is set to rank highly on Google by answering every aspect of user intent, technical detail, and benefits—with sources drawn directly from leading industry distributors and manufacturers. For current pricing, custom packages, and up-to-date guidance, trusted Multiquip dealers and specialists are recommended.