Skip to Main Content
Skip to Search Filters
Skip to Footer
Results loading, please wait
|
Help
My Account
Loading...
Cancel
Deliver to
Change Location
Shopping in
?
Add Installation to Your Order!
Shopping in
?
Add Installation to Your Order!
×
Change Location
Update your ZIP Code below to see if you're in our network.
Current location:
Enter ZIP Code
Update
Home
/
Generac Commercial Standby Generators
/
Generac Generators
/
Emergency Generators
/
Generac 40-59 kW Commercial Standby Generators
Generac 40-59 kW Commercial Standby Generators
Quick Search
Select Style
Portable
» Recreational
» Emergency
» Semi-Pro
» Professional
Standby
» Home Standby
» Whole House
» Commercial Standby
Light Tower
PTO
RV
Towable
Select Fuel
Diesel
Dual Fuel
Gasoline
Natural Gas
LP
Solar
Tri-Fuel
Tractor-Driven
Select Watts
Watts
900 - 1999 W
2000 - 3999 W
4000 - 5999 W
6000 - 9999 W
Kilowatts
10 - 15 kW
16 - 19 kW
20 - 29 kW
30 - 39 kW
40 - 59 kW
60 - 69 kW
70 - 99 kW
100+ kW
Select Brand
A-iPower
Briggs & Stratton
Caterpillar
Champion
Cummins Onan
Cummins Power Generation
Dewalt
ECHO
Firman Generators
Generac
Generac Commercial
Generac Guardian
Generac Protector
Generac PWRcell
Generac QuietSource
Gillette
Goal Zero
Honda
Honeywell
IMD
Kohler
Kubota
Milwaukee
Multiquip
Powermate
Westinghouse
Winco
Yamaha
Filter
▼
Best Selling
▼
Best Selling
Price: Low to High
Price: High to Low
Name: A-Z
Name: Z-A
Recommends Only
Closeouts Only
In-stock Only
Next Day Air Only
Availability
Go
Filters
Rated Watts (Watts)
44000 - 45999 (8)
48000 - 49999 (10)
50000 - 51999 (6)
Voltage
120/208 Three-Phase (6)
120/240 Single-Phase (6)
120/240 Three-Phase (6)
277/480 Three-Phase (6)
Engine Brand
Generac (8)
Generac 2.4L 4-Cylinder (8)
Mitsubishi (8)
Fuel Type
Diesel (8)
LP/Natural Gas (16)
Engine RPM (RPM)
1800 (16)
3600 (8)
CC (CC)
2400 (8)
3300 (7)
3400 (1)
4500 (8)
NG Power Capacity (Watts)
45000 (8)
48000 (8)
LP Power Capacity (Watts)
45000 (8)
48000 (8)
NG Fuel Consumption @ 100% Load (ft³/hr)
604 (8)
730 (8)
Compare
Generac Protector® 48kW Automatic Extended Run Standby Diesel Generator w/ Mobile Link™ (120/240V Single-Phase)
Model: RD04833ADAL
9% Buy This
Write a Review
$17,099.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator (Premium-Grade) w/ Mobile Link™ (120/240V Single-Phase) SCAQMD Compliant
Model: RG04845ANAC
7% Buy This
(1)
$15,864.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (120/240V Single-Phase) (CARB)
Model: RG04524ANAC
7% Buy This
Write a Review
$14,217.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator w/ Mobile Link™ (120/240V 3-Phase)
Model: RG04845JNAX
5% Buy This
(1)
$14,584.00
Was
$15,997.00
SAVE $1,413.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (120/208V 3-Phase)(CARB)
Model: RG04524GNAC
5% Buy This
Write a Review
$14,217.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® 48kW Automatic Standby Diesel Generator w/ Mobile Link™ (120/240V Single-Phase)
Model: RD04833ADAE
5% Buy This
Write a Review
$16,599.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (277/480V 3-Phase)
Model: RG04524KNAX
(1)
$13,037.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® 50kW Automatic Extended Run Standby Diesel Generator w/ Mobile Link™ (120/208V 3-Phase)
Model: RD05033GDAL
Write a Review
$17,099.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® 50kW Automatic Standby Diesel Generator w/ Mobile Link™ (120/208V 3-Phase)
Model: RD05033GDAE
Write a Review
$16,599.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® 50kW Automatic Extended Run Standby Diesel Generator w/ Mobile Link™ (120/240V 3-Phase)
Model: RD05033JDAL
Write a Review
$17,099.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® 50kW Automatic Standby Diesel Generator w/ Mobile Link™ (120/240V 3-Phase)
Model: RD05033JDAE
Write a Review
$16,599.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® 50kW Automatic Extended Run Standby Diesel Generator w/ Mobile Link™ (277/480V 3-Phase)
Model: RD05033KDAL
Write a Review
$17,099.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® 50kW Automatic Standby Diesel Generator w/ Mobile Link™ (277/480V 3-Phase)
Model: RD05033KDAE
Write a Review
$16,599.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (120/208V 3-Phase)
Model: RG04524GNAX
Write a Review
$13,037.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (120/240V 3-Phase)
Model: RG04524JNAX
Write a Review
$13,037.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (120/240V 3-Phase) (CARB)
Model: RG04524JNAC
Write a Review
Q&A
(1)
$14,217.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (277/480V 3-Phase) (CARB)
Model: RG04524KNAC
Write a Review
$14,217.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator w/ Mobile Link™ (120/208V 3-Phase)
Model: RG04845GNAX
Write a Review
$15,997.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator w/ Mobile Link™ (120/208V 3-Phase) SCAQMD Compliant
Model: RG04845GNAC
Write a Review
$15,864.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator w/ Mobile Link™ (120/240V 3-Phase) SCAQMD Compliant
Model: RG04845JNAC
Write a Review
$15,864.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator w/ Mobile Link™ (277/480V 3-Phase)
Model: RG04845KNAX
Write a Review
$14,584.00
Was
$15,997.00
SAVE $1,413.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator w/ Mobile Link™ (277/480V 3-Phase) SCAQMD Compliant
Model: RG04845KNAC
Write a Review
$15,864.00
Factory-Direct
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Compare
Generac Protector® QS Series 48kW Automatic Standby Generator (Premium-Grade) w/ Mobile Link™ (120/240V Single-Phase)
Model: RG04845ANAX
39% Buy This
(3)
$15,997.00
Backordered
Est. Ship Date May 14
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Backorder
Compare
Generac Protector® Series 45kW Automatic Standby Generator (Aluminum) w/ Mobile Link™ (120/240V Single-Phase)
Model: RG04524ANAX
25% Buy This
Write a Review
$13,037.00
Backordered
Est. Ship Date May 14
Free Shipping
×
Free Shipping
*This product qualifies for
Free Shipping
anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Backorder
PREVIOUS
PREV
1
NEXT
Displaying Products 1 - 24 (of 24
)
Hide
Compare
Clear All
