For office trailers with breakroom appliances or dual-trailer setups. Multiquip WhisperWatt DCA36/DCA45 — 30-36 kW prime rating, ~66 dBA, integrated 24-hour fuel tank with containment. The most popular tier for construction sites.
| Specification | Details |
|---|---|
| Reference Models | Multiquip WhisperWatt DCA36SPXU4F / DCA45SSIU4F |
| Prime Rating | 30-36 kW / 36-45 kVA |
| Standby Rating | 40 kW / 50 kVA |
| Voltage | 120/240V single-phase; 208-480V 3-phase (switchable) |
| Fuel | Diesel |
| Noise Level | ~66 dBA at full load |
| Fuel Tank | Integrated 24-hour tank with containment |
| Configuration | Tandem axle trailer, electric or hydraulic brakes |
| Best For | Office trailer + breakroom appliances, or 2 smaller trailers |
Need a generator for your site?
The 30-40 kW tier handles the full range of office trailer electrical loads including breakroom appliances that push smaller generators past their capacity.
Single office trailer running HVAC, computers, printers, and a breakroom with microwave, coffee maker, and full-size refrigerator. The 30-40 kW tier handles all of this at 60-70% capacity — well within the efficiency sweet spot.
Two smaller office trailers sharing a single generator. One trailer for the GC team, one for the owner's rep or subcontractor. Combined HVAC and office loads fit comfortably within the 30-40 kW range without overloading.
Oversized office trailer (60-foot) with multiple HVAC zones, server room or IT closet, large-format printers, and high outlet density. Electrical loads that exceed the 20-25 kW tier but do not require 50+ kW.
This is the most popular generator tier for construction sites with a single fully-equipped office trailer. It handles HVAC + microwave + coffee maker + fridge + multiple computers without capacity concerns. If you are not sure whether you need 20-25 kW or 30-40 kW, the 30-40 kW tier gives you headroom for breakroom appliances and future expansion without overpaying for a 50+ kW unit.