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WhisperWatt TLG12SPX Diesel generator


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Prime Rating: 12 kW (12 kVA)
Standby Rating: 13 kW (13 kVA)
60 Hertz, 3600 RPM
Single Phase, 1.0 Power Factor
120V - 50A (2 sets)
240V - 50A

WhisperWatt TLG12SPX drawing


Performance Data
Prime Rating 12 kW
Standby Rating 13 kW
Generator RPM 3600
Voltage - Single Phase 120/240 V
Generator Design Revolving field, Self-ventilated, Drip-proof, Single bearing
Voltage Regulation (No Load to Full Load) ±0.5%
Power Factor 1.0
Armature Connection Series
Excitation Brushless with AVR
No. Poles 2-pole
Frequency 60 Hz
Frequency Regulation (steady state load) ±3-5%
Sound Level (Full Load at 23 ft.) 68 dB(A)

Notice: Features and equipment specifications are subject to change without notice.


WhisperWatt TLG12SPX drawing



Standard Features:


Optional Features:


Control Panel Instrumentation:


Generator Specifications
Type 2-Pole, revolving field, self ventilated, drip-proof, single bearing
Excitation Brushless with AVR
Number of Leads 4 Leads
Frequency 60 Hz
Insulation Class F

Generator RPM

Power Factor 1.0
Armature Connection Series
Voltage Regulation ±0.5%
Sound Level dB(A) 68


Engine Specifications
Make Kubota
Model D902
Emissions EPA Tier 4 Certified
Design 3 Cylinder, 4-cycle, water cooled, Swirl Chamber
Displacement 898cc
Bore 2.83 in. (72 mm)
Stroke 2.89 in. (73.6 mm)
SAE Gross Horsepower 24.8 hp
Starting System Electric
Battery 12V 45Ah x 1
Oil Capacity 0.95 gal (3.6 L)
Coolant Capacity 0.92 gal (3.5 L)


Fuel System
Fuel Tank Capacity 13.5 gal (51.1 L)
Diesel Fuel at % of Load gal/hr (L/hr)
100% 1.4 (5.2)
75% 1.1 (4.4)
50% 1.0 (3.8)
25% 0.8 (3.1)


Weights and Measurements
Housing (mm)
56 in (1422)
34 in (863)
28 in (711)
Appx. Dry Weight
858 lbs (389 kg)
Appx. Wet Weight
964 lbs (437 kg)
Max. Lifting Capacity
1,600 lbs (735 kg)



Kubota Engine:
24 months or 2000 hours from date of purchase (whichever occurs first).
24 months or 2000 hours from date of purchase (whichever occurs first).
12 months excluding normal wear items.



Generator is not intended for use in enclosed areas or where free flow of air is restricted.
Backfeed to a utility system can cause electrocution and/or property damage. Do not connect to any building’s electrical system except through an approved device.
Specifications are subject to change without notice.



WhisperWatt TLG12SPX Spec Sheet