Generac XG04045CNAC 45kW LC 3 Phase Automatic Standby CARB Generator

Description

Generac XG04045CNAC Overview

The Generac XG04045CNAC is the CARB version of a liquid-cooled, three-phase automatic standby generator. A 4.5-liter inline four-cylinder engine turning at 1,800 RPM drives the alternator, and a Power Zone 410 controller manages the whole unit. That controller is NFPA 110 capable.

Fuel is chosen at the controller, natural gas or propane vapor, so one cabinet covers either supply. Output is 208/120 V three-phase, and the generator can be reconfigured for 480/277 V or 240/120 V with an optional field-installable VCC. The enclosure and frame resist corrosion, and the unit can be placed as close as 18 in (457 mm) from a structure. Cellular connectivity ties the generator into Mobile Link and Fleet, and the design is described as quiet in operation. A 5-year/2,000-hour limited warranty is listed for the unit.

Key Features

• A Power Zone 410 controller, which is NFPA 110 capable, manages the generator and handles fuel selection
• Built-in cellular connectivity links the unit to Mobile Link and Fleet for remote monitoring
• Fuel type is selected at the controller, so the same unit can run on natural gas or propane vapor
• High motor-starting ability and surge capacity help it cope with loads that draw heavily when they start
• The corrosion-resistant enclosure and frame come with quiet operation, and the unit can sit as close as 18 in (457 mm) to a structure
• Routine maintenance is handled from one side of the unit, so servicing needs access to only a single side
• EPA and SCAQMD exhaust emissions certification, together with a 5-year/2,000-hour limited warranty

Who It’s For

A fit for buyers who need automatic three-phase standby power and want a controller that reports over a cellular link. As the CARB version, it is the variant to look at when that designation matters, and the selectable fuel type helps wherever natural gas or propane vapor is on hand.

Specifications

SKU	XG04045CNAC
Brand	Generac
Generator Output
Voltage	XG03245				XG04045
	Natural Gas				Liquid Propane
	Power (kW)		Current (A)		Power (kW)		Current (A)
120/240 1-Phase	32	133	32	133	40		40	139
208/120 3-Phase	32	111	32	111	40		40	120
240/120 3-Phase	32		32		40		40
480/277 3-Phase	32		32		40		40
Voltage Regulation
Type	Electronic
Sensing	All Phases
Regulation	+- 1 percent
Governor Specifications
Type	Electronic
Frequency Regulation	Isochronous
Steady State Regulation	+- 25 percent
Alternator System Specifications
	XG03245		XG04045
	1-Phase	3-Phase	1-Phase	3-Phase
Voltage Output	120/240 V Only	208/120 V; Configurable for 480/277 or 240/120 V with Optional Field-Installable VCC	120/240 V Only	208/120 V; Configurable for 480/277 or 240/120 V with Optional Field-Installable VCC
Circuit Breaker (CB) Size	150 A	Not Included; Optional Field-Installable Kit	200 A	Not Included; Optional Field-Installable Kit
Type	Synchronous		Synchronous
Rotor Insulation Class	F		F
Stator Insulation Class	H		H
Telephone Interference Factor (TIF)	< 50		< 50
Bearings	Sealed Ball		Sealed Ball
Coupling	Flexible Disc		Flexible Disc
Excitation System	Direct		Direct
Engine Specifications
	XG03245	XG04045
Make	Generac
Model	Inline 4 Cylinder
Cylinders	4
Displacement (L)	4.5
Bore	4.5 in
Stroke	4.25 in
Compression Ratio	9.9:1
Lifter Type	Hydraulic
Intake Air System	Naturally Aspirated
Temperature Derate	1.5% per every 5°C above 25°C (1.65% per every 10°F above 77°F)
Altitude Derate	1% per every 100 m above 183 m (3% per every 1000 ft above 600 ft)
Exercise Speed (RPM)	1,200
Operating Speed (RPM)	1,800
Cooling System
	XG03245	XG04045
Coolant	50/50 (50% Ethylene Glycol)
Coolant System Capacity (L (US gal))	11 (2.9)
Water Pump	Belt-Driven
Fan Type	Mechanical
Fan Quantity	1
Maximum Ambient Air Temperature (C (F))	50 (122)
Fuel Types
	XG03245	XG04045
Natural Gas	Yes
NG Pressure (kPa (in. WC))	0.87: 3.48 (3.5-14)
Liquid Propane	Yes
LP Vapor Pressue (kPa (in. WC))	1.74: 3.48 (7-14)
Fuel Type Configuration	Controller-Selected
Fuel Shutoff Solenoid	Standard, Dual
Fuel Consumption
Rated Load	XG03245				XG04045
	Natural Gas		Liquid Propane		Natural Gas		Liquid Propane
	(m3/h)	(CFH)	(m3/h)	(CFH)	(m3/h)	(CFH)	(m3/h)	(CFH)
25%	4.8	169	8.3	2.2	5.2	184	10	2.6
50%	6.8	240	12.9	3.4	8.2	289	14.5	3.8
75%	9.5	335	15.8	4.2	11.1	392	17.7	4.7
100%	11.5	406	18.5	4.9	14	494	21.7	5.7
Electrical System
System Voltage	12
Battery Charge Alternator (A)	37
Battery Charger (A)	5
Recommended Battery (not included)	Group 27R, 725 CCA Minimum
Maximum Allowable Battery	Group 31R

Frequently asked questions

What does the CARB designation mean for the Generac XG04045CNAC?

The listing describes the XG04045CNAC as the CARB version of Generac’s liquid-cooled, three-phase automatic standby generator, and says it is the variant to look at when that designation matters. It also lists EPA and SCAQMD exhaust emissions certification for the unit.

What fuel does the XG04045CNAC run on?

Fuel type is selected at the Power Zone 410 controller, so the same cabinet runs on natural gas or propane vapor. The listing gives a natural gas supply pressure of 3.5 to 14 in. WC and an LP vapor pressure of 7 to 14 in. WC, with a dual fuel shutoff solenoid as standard.

What voltage does the Generac XG04045CNAC put out?

Output is 208/120 V three-phase. The generator can be reconfigured for 480/277 V or 240/120 V with an optional field-installable VCC. Voltage regulation uses electronic sensing on all phases, listed at plus or minus 1 percent, and the engine runs at 1,800 RPM with a 1,200 RPM exercise speed.

How is the XG04045CNAC monitored remotely?

Built-in cellular connectivity links the generator to Mobile Link and Fleet for remote monitoring. The Power Zone 410 controller, which is NFPA 110 capable, manages the whole unit and also handles fuel selection, so status and settings run through one controller.

How close to a building can it be installed, and how is it serviced?

The listing says the unit can sit as close as 18 in (457 mm) to a structure. Its enclosure and frame resist corrosion, and routine maintenance is handled from one side of the unit, so servicing needs access to only a single side.

What battery does the Generac XG04045CNAC need?

The recommended battery is not included. The listing calls for a Group 27R battery with 725 CCA minimum, and Group 31R is the maximum allowable size. The electrical system runs at 12 volts, with a 37 A battery charge alternator and a 5 A battery charger.

Buying advice: read our guide to whole house generator cost, or compare all home standby generators.