WOPUSAI 70kVA Four-Wheel Open Frame Generator for Construction Rental & Factory Standby

Product Overview

WOPUSAI 70kVA open-frame trailer diesel generator set adopts a dual-axle four-wheel general chassis matched with a standard all-steel open frame structure, positioned as a cost-effective universal model for engineering and rental scenarios. The unit integrates a standard traction assembly, modular damping base and heavy-duty all-steel open rack, featuring strong versatility and low daily operation and maintenance costs, and can be put into operation directly outdoors without additional debugging. It can be flexibly towed to small and medium-sized construction sites, power rental fleets, municipal maintenance projects and factory standby areas, delivering stable power output continuously in conventional field environments such as gravel roads and uneven construction sites. It is widely used in building engineering, equipment rental, municipal facility maintenance and medium-term backup power scenarios.

• Power: 70kVA
• Certifications: CE, ISO, MA, CNAS
• Typical Applications: Small and medium construction, power rental fleets, municipal maintenance, factory standby, small infrastructure projects

Product Showcase

This 70kVA four-wheel open-frame genset adopts a standard welded heavy-duty steel open frame. The frame is made of thickened carbon steel channel steel through full welding process, delivering solid structural rigidity and reliable load-bearing performance through integral full-welding technology. The fully open layout eliminates the heat accumulation problem of enclosed cabins, all core components are fully exposed, and daily inspection, fault diagnosis and component replacement are more direct and efficient without cabinet disassembly. The dual-axle four-wheel trailer chassis adopts a standard load-bearing beam frame with balanced axle load design, adapting to ordinary construction roads, suburban roads and medium-distance highway transportation. It is equipped with a standard traction coupling, two-point manual support legs and a mechanical braking system to ensure stable stationary operation. The control panel and output terminals are centrally arranged on the side of the frame, with basic splash protection for convenient field operation. The unit base is fitted with multi-point vibration damping devices to reduce vibration transmission during towing and continuous operation.

Key Specifications

Open Frame & Mobile Technology: Built for Universal Engineering Mobile Power

WOPUSAI four-wheel open-frame trailer genset adopts universal medium-power open mobile power technology, optimized for 70kVA daily relocation and medium-load continuous operation scenarios.

1. Universal Open Frame Structure

The open rack adopts fully welded channel steel structure with moderate structural rigidity and load capacity. The fully open design eliminates heat retention of enclosed cabins, relying on natural convection for efficient heat dissipation, suitable for long-hour continuous operation in conventional field environments. The open layout allows full visibility of all components, making daily inspection and fault troubleshooting more efficient without cabinet dismantling, and universal components reduce later maintenance costs.

2. Dual-axle Four-wheel General Chassis

The chassis adopts dual-axle four-wheel layout with balanced load distribution, equipped with standard heavy-duty tires and universal axle design. The structure steadily bears the full weight of the unit and adapts to gravel, muddy construction roads and medium-distance highway hauling. Standard traction connector matches various common towing vehicles, supporting flexible relocation between different working zones.

3. Modular Damping Base Structure

Multiple sets of standard shock absorbers are installed between the generator unit and trailer frame, filtering road vibration during towing and reducing operational resonance. It protects internal components from vibration damage during medium-distance transportation, and maintains stable operation on uneven pavement and construction sites.

4. Reinforced All-steel Chassis Construction

The entire frame and chassis adopt integral full-welding process for enhanced structural strength and load-bearing capacity. The chassis bottom is reinforced with heavy-duty steel plate, adapting to gravel and rough road conditions for extended service life.

🎯 Application Scenarios

• Small and Medium Construction Projects: Continuous mobile power for building construction, road repair and small infrastructure engineering
• Power Rental Fleets: Cost-effective medium-power rental units for short and medium-term engineering projects
• Municipal Facility Maintenance: Mobile power for municipal facilities maintenance, pipeline repair and urban rush-repair
• Factory Standby Power: Emergency backup power for factory workshops, equipment maintenance and production lines
• Small Infrastructure Projects: Stable power supply for township construction and small public facility projects

🌟Core Product Features

• Efficient Heat Dissipation: Fully open frame structure, natural convection cooling, no heat build-up, suitable for long-time continuous medium-load operation in field environments.
• Universal Four-wheel Mobility: Standard load-bearing frame with common tires, adapting to various conventional road conditions from urban roads to construction sites.
• Convenient Open Maintenance: Open layout with full component visibility, more efficient daily inspection and fault handling, no cabinet disassembly required, and low later maintenance cost.
• Sturdy & Durable: Thickened steel welded frame with solid construction, strong load-bearing capacity, suitable for long-term outdoor operation.
• Cost-effective Universal Design: Standard traction interface and modular structure, compatible with various towing vehicles and working scenarios, high cost performance for rental and engineering use.

🛠️ Customization Services

Wopusai Mechanical and Electrical provides professional four-wheel open-frame trailer genset customization solutions:

• Structure Customization: Upgrade braking system, switch to hydraulic support legs, add optional rain canopy, adjust frame load capacity.
• Configuration Customization: Equip ATS automatic transfer switch, expand integrated fuel tank, add multiple external output sockets, install remote monitoring module.
• Detail Customization: Custom frame color, add warning indicator lights, brand logo spraying, adjust control panel layout.

Customization Process: Demand Communication → Quotation → Production → Commissioning → Delivery. Professional team tracks the whole process to ensure customized quality.

📦 Packaging Standards

The whole genset is fixed on the trailer chassis with reinforced binding straps. Key precision components are wrapped with waterproof and scratch-resistant protective film. Tires, traction assembly and exposed structural parts are separately protected to avoid collision damage during long-distance sea and land transportation.

🚛 Loading and Shipping Guarantee

We cooperate with professional logistics providers to support whole-vehicle land and sea transportation, with full cargo insurance and real-time tracking. Complete customs declaration documents and export supporting documents are provided. Conventional trailer units can be delivered within 15–30 working days.

🏢 Wopusai Brand Brief Introduction

Founded in 2012 in Foshan, Wopusai Mechanical and Electrical Co., Ltd. has more than 20 years of professional experience in power equipment manufacturing. Our product portfolio covers 1kVA‑2000kVA, including open frame type, silent type, trailer type and container type gensets, with CE, ISO, MA, CNAS authoritative certifications.

We focus on R&D and manufacturing of outdoor mobile power equipment. Our four-wheel open-frame trailer series features reliable structure, efficient heat dissipation and cost-effective performance, suitable for medium-sized construction, rental and municipal mobile power scenarios. Each unit undergoes strict road vibration test and load inspection before delivery. We provide one-stop mobile power solutions, 7×24-hour after-sales support and global sales service system.