1. Open‑Frame Generator (Open Type)

Structure & Features

• Bare engine and alternator, no fully enclosed canopy

• Natural air cooling, high heat dissipation efficiency

• Simple structure, high reliability, easy maintenance

Advantages

• Lowest purchase cost

• Excellent heat dissipation, suitable for heavy-duty long-time running

• Easy to overhaul, repair, and daily inspection

• Smaller overall size for the same power

Disadvantages

• High noise (typically 90–105 dB(A) at 7m)

• Poor protection against rain, dust, and theft

• No sound insulation or weather shielding

Suitable For

• Outdoor construction sites, open-pit mines, farms

• Factory backup rooms, mechanical rooms with good ventilation

• Places with low noise requirements

• Long-term, high-load continuous operation

Unsuitable For

• Residential areas, offices, hotels, hospitals

• Night construction, densely populated areas

2. Silent / Soundproof Generator (Canopy Type)

Structure & Features

• Fully enclosed steel canopy with sound-absorbing cotton

• Built-in silencer, air intake and exhaust silencing structure

• IP54 or higher protection grade (waterproof, dustproof)

Advantages

• Low noise: typically 60–75 dB(A) at 7m

• Weatherproof (rain, snow, dust)

• Clean and tidy appearance, suitable for public areas

• Built-in fuel tank, control panel, and safety alarms

Disadvantages

• Higher price than open-frame

• Slightly poorer heat dissipation; requires good ventilation

• Larger volume and heavier weight

• Maintenance is relatively less convenient

Suitable For

• Residential quarters, commercial streets, supermarkets

• Hospitals, schools, office buildings, data centers

• Construction sites requiring night work

• Outdoor events, exhibitions, concerts

• Any noise-sensitive environment

Unsuitable For

• Extremely harsh environments with ultra-high temperature

• Budget-limited projects with no noise limits

3. Mobile Generator (Trailer / Wheeled Type)

Structure & Features

• Equipped with trailer chassis, drawbar, support legs, wheels

• Can be two-wheel trailer or four-wheel mobile type

• Most are combined with silent canopy for mobile silent use

Advantages

• High mobility, can be quickly transferred by vehicle towing

• Convenient for multi-point power supply

• Fast deployment for emergency use

• Stable chassis, suitable for field and road transfer

Disadvantages

• Higher cost than stationary types

• Larger overall dimensions

• Requires parking space and towing conditions

Suitable For

• Emergency power supply, flood control, disaster relief

• Road construction, railway maintenance, pipeline engineering

• Field operations, military, outdoor construction teams

• Temporary power for multi-location events

Unsuitable For

• Fixed backup use in one location (wastes mobility function)

• Places with narrow access and no towing space

Professional Selection Summary

1. Low budget, fixed location, no noise limit

   → Choose open‑frame
2. Urban areas, residential, night construction, noise control required

   → Choose silent type
3. Frequent site changes, emergency rescue, field operations

   → Choose mobile silent generator (trailer type)
4. Long-term heavy-duty running

   → Prioritize open-frame; if noise is needed, select high-performance silent with enhanced cooling
5. Outdoor exposed environment

   → Must choose silent canopy (rainproof & dustproof)