HomeKohlerKohler 150REZG

Kohler 150REZG Generator Set

The Kohler 150REZG is a 150 kW (188 kVA) natural gas / LP standby generator set. It is available at 480 V, 3-phase and 60 Hz. It holds about 8.5 L (2.2 gal) of oil and 25.5 L (6.7 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 630 CCA at 12 V. The set measures 2800×1120×1538 mm (110.2×44.1×60.6 in), weighs about 1440 kg (3175 lb) and produces 74 dBA at 23 m.

150 kW
Standby
8.5 L
Oil capacity
3
Document types

How to read your Kohler serial & model number →

Compare with other 150–155 kW Bi-Fuel (NG/LP) generators →

Specifications

Fuelnatural gas / LP
Frequency60.0 Hz
Standby power150 kW
Standby kVA188
Prime power139 kW
EmissionsEPA-Certified for Stationary Emergency Applications
Oil capacity8.5 L
Alternator4S12X
Voltage options480 V
Phase3
Battery cranking630 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity25.5 L
Max ambient50 °C
Dimensions (L×W×H)2800×1120×1538 mm
Dry weight1440 kg
Sound level74.0 dBA @ 23 m

Service specifications

30
TypeItemValueUnitCondition
Other10 in. weld flange bolt circle diameter B361.95mm (14.25 in.)
Other10 in. weld flange outside diameter C406.4mm (16.0 in.)
Other10 in. weld flange quantity of bolts / bolt hole diameter D12, 25.40mm (1.00 in.)
Other12 in. weld flange bolt circle diameter B431.80mm (17.00 in.)
Other12 in. weld flange outside diameter C482.6mm (19.0 in.)
Other12 in. weld flange quantity of bolts / bolt hole diameter D12, 25.40mm (1.00 in.)
Other14 in. weld flange bolt circle diameter B476.25mm (18.75 in.)
Other14 in. weld flange outside diameter C533.4mm (21.0 in.)
Other14 in. weld flange quantity of bolts / bolt hole diameter D12, 28.58mm (1.13 in.)
Other16 in. weld flange bolt circle diameter B539.75mm (21.25 in.)
Other16 in. weld flange outside diameter C596.9mm (23.5 in.)
Other16 in. weld flange quantity of bolts / bolt hole diameter D16, 28.58mm (1.13 in.)
Other18 in. weld flange bolt circle diameter B577.85mm (22.75 in.)
Other18 in. weld flange outside diameter C635.0mm (25.0 in.)
Other18 in. weld flange quantity of bolts / bolt hole diameter D16, 31.75mm (1.25 in.)
Other20 in. weld flange bolt circle diameter B635.00mm (25.00 in.)
Other20 in. weld flange outside diameter C698.5mm (27.5 in.)
Other20 in. weld flange quantity of bolts / bolt hole diameter D20, 31.75mm (1.25 in.)
Other5 in. weld flange bolt circle diameter B215.90mm (8.50 in.)
Other5 in. weld flange outside diameter C241.30mm (9.50 in.)
Other5 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
Other6 in. weld flange bolt circle diameter B254.0mm (10.0 in.)
Other6 in. weld flange outside diameter C279.4mm (11.0 in.)
Other6 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
Other8 in. weld flange bolt circle diameter B298.45mm (11.75 in.)
Other8 in. weld flange outside diameter C342.9mm (13.5 in.)
Other8 in. weld flange quantity of bolts / bolt hole diameter D8, 22.23mm (0.88 in.)
OtherWeld flange angle A (10, 12, 14 in. nominal pipe size)30deg.
OtherWeld flange angle A (16, 18, 20 in. nominal pipe size)22.5deg.
OtherWeld flange angle A (5, 6, 8 in. nominal pipe size)45deg.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

VoltagePhaseConnectionLeadsNotes
12-LeadAlternator Reconnections diagram ADV-5875B-M (page 16)
4-LeadAlternator Reconnections diagram ADV-5875A-M (page 15)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What is the power rating of the Kohler 150REZG?

The Kohler 150REZG is rated 150 kW standby (188.0 kVA).

What kind of fuel does the Kohler 150REZG run on?

The Kohler 150REZG runs on natural gas / LP.

What alternator does the Kohler 150REZG use?

The Kohler 150REZG uses a 4S12X alternator.

Fuel consumption

RatingLoadL/hgal/h
Standby8.12.14
Standby25%19.55.15
Standby50%31.28.24
Standby75%43.311.44
Standby100%55.714.71

Available documents

Spec sheet (Kohler)Spec sheet — g4219 (Kohler)Reference (Kohler)Reference — G6-39 0918AZ (Kohler)Reference — Kohler-Gas Generators Brochure (Kohler)Reference — Reinstated Enclosures (Kohler)Reference — vertical circulator plug in Kohler. G6171 (Kohler)Service manual — cold weather kit tt1723 (Kohler)Service manual — tp6712 (Kohler)Service manual — tp6799 (Kohler)Service manual — tt1723 (Kohler)