40kVA Two-Wheel Compact Open Frame Generator for Small Sites & Plant Maintenance

Product Overview

WOPUSAI 40kVA open-frame trailer diesel generator set adopts a single-axle two-wheel chassis matched with an all-steel open frame structure, specially designed for narrow-space sites and short-distance mobile power scenarios with high heat dissipation demands. The unit integrates a traction drawbar, damping base and heavy-duty all-steel open rack, featuring compact footprint and easy maneuverability, ready for outdoor operation without extra installation. It can be conveniently towed to factory maintenance sites, small construction projects, municipal rush-repair spots and temporary activity venues, delivering stable power output reliably in uneven and compact field environments. Widely applied in plant facility maintenance, small-scale engineering construction, municipal emergency repair and temporary power supply scenarios.

• Power: 40kVA
• Certifications: CE, ISO, MA, CNAS
• Typical Applications: Plant maintenance, small construction sites, municipal rush-repair, temporary events, small backup power

Product Showcase

This 40kVA two-wheel open-frame genset features an integrated welded heavy-duty steel open frame. The frame is fabricated from thickened carbon steel channel with full welding process, delivering solid structural rigidity and reliable load-bearing performance. The fully open layout eliminates enclosed cabin heat retention, all core components are fully exposed for visual inspection, fault diagnosis and component replacement without cabinet disassembly. The single-axle two-wheel chassis adopts a balanced load-bearing frame design, with ultra-small turning radius, adapting to narrow factory roads, community lanes and small construction yards. It is fitted with standard traction drawbar, manual support legs and mechanical braking system for stable parking and operation. The control panel and output terminals are centrally mounted on the frame side for easy operation with basic splash protection. The unit base is fitted with multi-point vibration damping devices to reduce vibration transmission during towing and operation.

Key Specifications

Open Frame & Mobile Technology: Built for Compact Efficient Mobile Power

WOPUSAI two-wheel open-frame trailer genset adopts targeted lightweight open mobile power technology, optimized for 40kVA small-power short-distance transfer and outdoor temporary operation scenarios.

1. Fully Open Frame Structure

The open rack adopts fully welded channel steel structure with high structural rigidity. The fully open design eliminates heat accumulation of enclosed cabins, relying on natural convection for efficient heat dissipation, suitable for continuous operation in high-temperature environments. The open layout allows full visibility of all components, making daily inspection and fault troubleshooting more efficient without cabinet dismantling.

2. Single-axle Two-wheel Lightweight Chassis

The chassis adopts single-axle two-wheel layout with compact body and ultra-small turning radius, delivering excellent maneuverability in narrow spaces like factory roads and small construction sites. The lightweight frame design reduces overall weight, can be towed by light vehicles, realizing fast transfer between scattered work points.

3. Multi-point Damping Base Structure

Multiple sets of heavy-duty 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 short-distance transportation, and maintains stable operation on uneven pavements 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

• Plant Facility Maintenance: Mobile power for factory equipment maintenance, workshop overhaul and in-plant temporary power supply
• Small Construction Sites: Temporary power for narrow-space construction, house building and renovation projects
• Municipal Rush-repair: Emergency mobile power for pipeline repair, road maintenance and urban rush-repair projects
• Temporary Events: Temporary power supply for small outdoor events, exhibitions and community activities
• Small Backup Power: Emergency standby power for small workshops, commercial outlets and property facilities

🌟Core Product Features

• Efficient Heat Dissipation: Fully open frame structure with natural convection cooling, no heat build-up, suitable for long-time continuous operation in high-temperature environments.
• Compact Two-wheel Maneuverability: Ultra-small turning radius, excellent flexibility in narrow spaces, ideal for in-plant and small-site operations.
• Convenient Maintenance: Open layout with full component visibility, more efficient daily inspection and fault handling, no cabinet disassembly required.
• Sturdy & Durable: Thickened steel welded frame with solid construction, strong load-bearing capacity, suitable for long-term outdoor operation.
• Lightweight & Easy Towing: Lightweight overall design, towable by light vehicles, fast transfer between scattered work points.

🛠️ Customization Services

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

• Structure Customization: Upgrade braking system, adjust support leg style, add optional rain canopy, modify frame dimensions.
• Configuration Customization: Equip ATS automatic transfer switch, expand fuel tank capacity, add external output sockets, install remote monitoring module.
• Detail Customization: Custom frame color, add warning indicator lights, brand logo spraying, adjust control panel position.

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. Key components are wrapped with waterproof and scratch-proof protective film. Tires, traction parts and exposed structural parts are separately protected to avoid collision damage during transportation.

🚛 Loading and Shipping Guarantee

We cooperate with professional logistics providers to support 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 two-wheel open-frame trailer series features compact size, flexible maneuverability, efficient heat dissipation and convenient maintenance, suitable for small-site and short-distance 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.