This is a large, industrial generator housed in a white, boxy enclosure. The entire unit is mounted on a black, triple-axle trailer, indicating that it is designed to be mobile for use at construction sites or for temporary power needs. Various access panels, vents, and branding like "AIRMAN" and "SDG400" are visible on its side.
Airman SDG125S diesel generator. You can see the "SDG125S" model number clearly labeled on the side. It's a substantial, enclosed generator mounted on a tandem-axle trailer, making it highly portable for various job sites around Tomball. The specifications indicate it offers 137.5 kVA of standby power and 125 kVA of prime power, with a runtime of 23.3 hours. It also features an "Airman Generators Tier 4 Final" emission standard. This type of generator is often used for construction, events, or as a reliabl
This is a large, industrial generator housed in a white, boxy enclosure. The entire unit is mounted on a black, triple-axle trailer, indicating that it is designed to be mobile for use at construction sites or for temporary power needs. Various access panels, vents, and branding like "AIRMAN" and "SDG400" are visible on its side.
Airman SDG125S diesel generator. You can see the "SDG125S" model number clearly labeled on the side. It's a substantial, enclosed generator mounted on a tandem-axle trailer, making it highly portable for various job sites around Tomball. The specifications indicate it offers 137.5 kVA of standby power and 125 kVA of prime power, with a runtime of 23.3 hours. It also features an "Airman Generators Tier 4 Final" emission standard. This type of generator is often used for construction, events, or as a reliabl
Airman

Airman 400kVA Mobile Diesel Generator SDG400S-8E1 Three-Phase Prime Power Trailer-Mounted Isuzu 6WG Engine Tier 4 Final 21.3-Hour Runtime Digital Control Panel

Only 1 left
SKU: SDG400S-8E1
$182,500.00
Description

Massive Power. Minimal Downtime. Built for Demanding Sites and Continuous Operation

Call for Availability and Shipping 281-351-2211

When your job site demands uninterrupted, high-capacity power, the Airman SDG400S-8E1 400kVA Mobile Generator delivers. Designed for industrial operations, disaster response, and large-scale construction, this generator offers three-phase and single-phase switchable output, a Tier 4 Final Isuzu 6WG diesel engine, and a 21.3-hour runtime at full load.

With Delta Demand Excitation for best-in-class motor starting capability, the SDG400S-8E1 automatically adjusts to varying loads for consistent performance. The DSEGenset® digital control panel provides real-time diagnostics, while external fuel tank connections and curbside access simplify maintenance. Whether you're powering critical infrastructure or remote operations, this generator is engineered for reliability, mobility, and efficiency.

What's Included

  • (1) Airman SDG400S-8E1 Mobile Generator – 400kVA Prime / 420kVA Standby
  • (1) Isuzu 6WG1X Tier 4 Final Diesel Engine
  • (1) Integrated Trailer – 19,602 lb GVWR with 2,650 lb trailer weight
  • (1) DSEGenset® Digital Control Panel
  • (1) External Fuel Tank Connection Kit

Available for pickup at our location:

30702 State Highway 249
Tomball, Texas 77375 

Monday-Friday 7am-5pm CST 
Saturday 7am-1pm CST

Specifications

Model Number SDG400S-8E1
Prime Power 400 kVA / 320 kW
Standby Power 420 kVA / 336 kW
Engine Isuzu 6WG1X – 457.7 HP @ 1,800 RPM
Voltage – Single Phase 120V / 127V / 139V / 240V / 254V / 277V
Voltage – Three Phase 208V / 220V / 240V / 416V / 440V / 480V
Amperage – 3 Phase 208V 1,048 A
Amperage – 3 Phase 240V 962 A
Amperage – 1 Phase 240V 50 A x 3
Runtime @ Full Load 21.3 hours
Fuel Tank Capacity 491 gal
EPA Emission Level Tier 4 Final
Operating Weight 17,042 lbs
Dry Weight 13,206 lbs
GVWR 19,602 lbs
Trailer Weight 2,650 lbs
Dimensions (W/O Trailer) 177″ L x 59″ W x 107.5″ H
Dimensions (With Trailer) 270″ L x 92″ W x 127″ H
Warranty Manufacturer Warranty
Prop 65 WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Key Features

  • Delta Demand Excitation for superior motor starting
  • Digital control panel with advanced diagnostics
  • Lockable voltage selector switch for secure operation
  • External fuel tank connections and curbside access
  • Trailer-mounted for fast deployment and transport

Power your next large-scale project with the Airman SDG400S-8E1—engineered for performance, built for mobility, and trusted in the most demanding environments.


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