SWT Kubota V3300 Series Diesel Generator Sets
The series covers both 50Hz and 60Hz markets, with 3-phase and single-phase models available. It is suitable for small commercial facilities, residential backup power, telecom support, mobile service applications, farms, workshops and light industrial backup power systems.
Model Range
| Model | Frequency | Phase | Rated Voltage | Prime Power | Standby Power | Rated Speed |
| SK40 | 50Hz | 3-phase | 380/400/415V | 29 kW / 36 kVA | 32 kW / 40 kVA | 1500 rpm |
| SK40-1P | 50Hz | Single-phase | 230V | 29 kW / 36 kVA | 32 kW / 40 kVA | 1500 rpm |
| SK49X | 60Hz | 3-phase | 220/127V | 35.4 kW / 44 kVA | 39 kW / 49 kVA | 1800 rpm |
| SK49X-1P | 60Hz | Single-phase | 240V | 35.4 kW / 44 kVA | 39 kW / 49 kVA | 1800 rpm |
Note: In the original specification sheets, the apparent power unit appears as “VA” in some places. For product-page clarity, it has been expressed as “kVA”, which matches standard generator-set rating practice.
Configuration and Dimensions
| Model | Configuration | L x W x H | Weight |
| SK40 | Open type | 1910 x 730 x 1170 mm | 850 kg |
| SK40 | Silent type | 2215 x 1000 x 1550 mm | 950 kg |
| SK40 | Super silent | 2300 x 1120 x 1750 mm | source sheet inconsistent; confirm before quotation |
| SK40-1P | Open type | 1910 x 730 x 1170 mm | 850 kg |
| SK40-1P | Silent type | 2215 x 1000 x 1550 mm | 1100 kg |
| SK40-1P | Super silent | 2300 x 1120 x 1750 mm | source sheet inconsistent; confirm before quotation |
| SK49X | Open type | 1910 x 730 x 1170 mm | 850 kg |
| SK49X | Silent type | 2215 x 1000 x 1550 mm | 950 kg |
| SK49X | Super silent | 2300 x 1120 x 1750 mm | source sheet inconsistent; confirm before quotation |
| SK49X-1P | Open type | 1910 x 730 x 1170 mm | 850 kg |
| SK49X-1P | Silent type | 2215 x 1000 x 1550 mm | 1100 kg |
| SK49X-1P | Super silent | 2300 x 1120 x 1750 mm | source sheet inconsistent; confirm before quotation |
The source files show different super-silent weight values between English and Chinese versions for some models. The final commercial quotation should confirm the exact weight according to the selected enclosure and project configuration.
Key Product Advantages
- Compact generator-set design suitable for limited-space installations and mobile power applications.
- Kubota V3300-T-BG engine platform with water cooling and turbocharged air intake.
- 50Hz and 60Hz models available for different regional grid and equipment requirements.
- 3-phase and single-phase options for commercial, residential and light industrial loads.
- Open, silent and super-silent configurations available to match site noise and installation requirements.
- Standard single-unit control system supports local/remote start, parameter detection, event logging and protection functions.
Engine and Alternator Summary
All four models are based on the Kubota V3300-T-BG engine. The engine is a 4-cylinder in-line, turbocharged and water-cooled diesel engine with 3.318 L displacement. To keep the product page focused on customer value rather than excessive engine details, only the most relevant technical information is summarized here.
| Item | Summary |
| Engine model | Kubota V3300-T-BG |
| Engine type | Turbocharged, water-cooled, 4-cylinder in-line diesel engine |
| Displacement | 3.318 L |
| 50Hz engine speed | 1500 rpm |
| 60Hz engine speed | 1800 rpm |
| Cooling system | Water cooling; engine coolant capacity 12.5 L |
| Lubrication system | Lubricating oil capacity 13.2 L |
| Starting system | 12V starting system |
Control System
The standard SWT single-unit control system provides LCD display and key operation, multilingual display, engine and alternator parameter monitoring, local and remote start, event logs and protection functions. The control box can support voltage/current measurement, generator/mains circuit breaker control and communication interface options depending on the final configuration.
Optional ATS and Paralleling System
An ATS system can be selected for automatic transfer between mains/mains or mains/generator power sources. The specification sheets describe fast on-load switching with PC-level switch structure and electrical/mechanical interlocking. Communication functions require an additional communication module.
For multi-unit or grid-related applications, the SWT paralleling system can be configured. The system supports automatic unit starting, automatic paralleling, load-based unit input/output and expansion planning. For small Kubota units, actual paralleling requirements should be confirmed according to load profile, voltage system and project layout.
Recommended Applications
| Application | Customer Need | SWT Solution Value |
| Residential backup power | Reliable power during grid outages | Single-phase models and silent options for smaller loads |
| Small commercial buildings | Stable standby power for lighting, office loads and basic equipment | Compact genset with optional ATS for automatic transfer |
| Telecom and communication sites | Longer standby runtime and stable voltage output | Diesel backup system with control and protection functions |
| Farms and workshops | Power support for tools, pumps and small machinery | 3-phase options and rugged open/silent configurations |
| Mobile service and rental support | Easy transportation and flexible use | Compact power range with multiple enclosure options |
Standard and Optional Accessories
Standard accessories include test report, certificate of quality, schematic diagram, installation manual, operation manual, engine, alternator, common base frame, control box, single-unit controller, circuit breaker and industrial muffler. Optional items include daily fuel tank, residential silencer, power cable, anti-condensation heater, battery charger, water jacket heater, oil heater, fuel level indication, auto fuel/oil filling options, soundproof enclosure, trailer, RS485, Ethernet communication, cloud monitoring, ATS cabinet, paralleling function and spare parts.
FAQ
What is the difference between SK40 and SK40-1P?
Both are 50Hz models with similar power ratings. SK40 is a 3-phase model with 380/400/415V output, while SK40-1P is a single-phase model with 230V output.
What is the difference between SK49X and SK49X-1P?
Both are 60Hz models. SK49X is a 3-phase model with 220/127V output, while SK49X-1P is a single-phase model with 240V output.
Can the generator be supplied with a silent enclosure?
Yes. The series can be supplied in open type, silent type or super-silent configuration depending on project requirements.
Is ATS standard?
ATS is listed as an optional system. It should be selected according to the required automatic transfer function and site power distribution design.
Can the unit be customized?
Yes. SWT can configure the generator set according to frequency, voltage, phase, enclosure type, control system, communication and accessory requirements.
