The Doosan G400 is a high‑capacity 400 kVA (320 kW) mobile generator engineered for large construction sites, industrial operations, emergency backup, and event power across Hawaiʻi. Powered by the Cummins QSB7 Tier 4 Final diesel engine, the G400 delivers exceptional fuel efficiency, low emissions, and rock‑solid voltage stability.

Designed for demanding applications, the G400 features a Marelli alternator, dual‑frequency capability (50/60 Hz), multi‑voltage output, and a sound‑attenuated enclosure that keeps noise levels low despite its massive output. With a large fuel tank and optimized load management, the G400 provides extended runtime suitable for 24/7 operations.

This unit is trailer‑mounted for easy transport and is ideal for powering tower cranes, large pumps, industrial equipment, temporary facilities, and emergency response operations across Oʻahu, Maui, Big Island, and Kauaʻi.

KEY FEATURES

• 400 kVA / 320 kW prime output
• Cummins QSB7 Tier 4 Final diesel engine
• Marelli alternator for stable voltage
• Quiet operation with sound‑attenuated enclosure
• Multi‑voltage output: 120/208V 3Ø, 120/240V 1Ø, 277/480V 3Ø
• 50/60 Hz switchable frequency
• Extended runtime for 24/7 operations
• Rugged trailer‑mounted configuration
• Ideal for industrial, construction, and emergency backup