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Description
Generac XG04045ANAC 45kW LC Single Phase Automatic Standby CARB GeneratorProduct Downloads Brochure Specifications Owner's Manual Wi Fi Manual Warranty Features Power Zone 410 Controller, NFPA 110 Capable Cellular Connectivity for Mobile Link and Fleet Quiet Operation Corrosion Resistant Enclosure & Frame 5 Year 2,000 Hour Limited Warranty Hi Motor Starting, Surge Capacity Fuel Efficiency Controller Selectable Fuel Type Natural Gas or Propane Vapor 1 Phase or Configurable 3 Phase Voltage Output Single Side Regular
Features
- Power Zone 410 Controller, NFPA 110 Capable
- Cellular Connectivity for Mobile Link and Fleet
- Quiet Operation
- Corrosion Resistant Enclosure & Frame
- 5 Year/2,000 Hour Limited Warranty
- Hi Motor Starting, Surge Capacity
- Fuel Efficiency
- Controller-Selectable Fuel Type - Natural Gas or Propane Vapor
- 1-Phase or Configurable 3-Phase Voltage Output
- Single-Side Regular Maintenance Access
- EPA & SCAQMD Exhaust Emissions Certified
- As close as 18 in (457 mm) offset distance from structure
What's in The Box
- 45kW LC Automatic Standby Generator 1-Phase CARB - XG04045ANAC
- Owners Manual
Warranty
- 5-Year Limited Factory Warranty
- 30 Day Satisfaction Guaranteed
Specifications
| SKU | XG04045ANAC | |||||||
| 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 | |||||||
GENERAC GUARDIAN SERIES 20KW GENERATOR FEATURES AND BENEFITS
This generator provides essential circuit power protection for your home during a power outage, ensuring that essential appliances maintain power. This standby generator is automatic and offers protection year-round, for less than the cost of central air conditioning.
Every Guardian Series home standby generator comes with Mobile Link™ Remote Monitoring. Remote Monitoring is FREE, and allows you to monitor the status of your generator from anywhere in the world. Use a smartphone, PC, or tablet to access generator information, such as the current operating status and maintenance alerts. By connecting your account you have access to authorized service dealers for fast, friendly, and proactive service.
Generac generators are ideal for weathering storms and power outages. Their automatic backup power gives you piece of mind that your home and appliances are protected.
Generac generators and engines are designed, engineered and assembled in the USA using domestic and foreign parts.
The Generac G-Force Engine is built to handle the stressors of generator use. This results in power that’s more reliable and requires less routine maintenance than competitor engines. Generac’s new G-Force engine is purpose built and pressure-lubricated. It features hydraulic lifters, which improve engine performance and extending the life of the product. (Hydraulic lifters only available on the 13 & 16 kW.)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
It only takes 2 days for it to arrive!
Color: All White, Size: XX-Large
Love the soft material!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 3
Not wrinkle free
Color: Black, Size: X-Large
Not wrinkle free
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Great fit, quality, and didn’t need ironing!
Color: All White, Size: X-Large
Perfect! I bought this for my husband for a summer wedding in Atlanta. Well worth the price!! It washed up great!! Never had to iron…gotta love it!
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Reviewed in the United States on July 24, 2025
★★★★★ 5
Highly Recommended Dress Shirt
Fit Type: Regular Fit, Color: White, Size: Medium
Honestly, I Love It. Fits Great, Neck Isn't Too Tight Like Most Shirts, And It's Comfortable. It Is 100% Cotton, So Dont Forget To Iron It Before Wearing It. High Quality Dress Shirt. Highly Recommended.
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Reviewed in the United States on October 21, 2025
★★★★★ 5
Surprisingly good shirt for the price
Fit Type: Regular Fit, Color: White, Size: XX-Large
I’m generally pleased with my purchase. I got a 2XL because the website it would fit my neck. Around the waist it fit similar to Amazon Essentials work shirts (like mechanics use which I find comfortable).
It was snug around the waist when sitting, but I can’t complain because I have a belly. I did find the neck snug when buttoning the top button so it means the neck is 18 or 18.5 and I wear a 19/19.5 to have 1-2 fingers space in the collar.
The shirt is surprisingly thick like Amazon’s work shirts, much thicker than other dress shirts from another brand.
And I am pleased that this shirt has button holes like other Amazon shirts does, all vertical button holes except the last one at the bottom which is horizontal. That feature keeps the shirt from unbuttoning itself during daily movement at the office. A very nice feature! I was a little disappointed in how it was packaged however but I have to press and wash it anyway.
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Reviewed in the United States on February 24, 2023