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Commercial Generators:

                 Commercial Power Generators for your Office

 
 20kW - 1.5L
Specs
25kW - 1.6L 
Specs
 35kW - 2.4L
Specs
     45kW - 2.4L
 Specs
 60kW - 3.0L
Specs
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70kW - 6.8L
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 80kW - 4.6L
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 100kW - 5.4L
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100kW - 6.8L
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   130kW - 6.8L
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  150kW - 6.8L
 Specs
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Revolutionizing the Commercial Market, GUARDIAN® has long been known as America’s #1 choice in home standby generators. Now, we’re fast becoming recognized as the company that revolutionized the commercial market. That’s because we’ve eliminated the noise, fuel and installation concerns that traditionally made commercial standby power too costly. GUARDIAN Elite™ generators are reliable and value-oriented. So much so, they often pay for themselves during the first extended outage.

20-150 kW Liquid-Cooled Standby Generators GUARDIAN® is now doing to the commercial market what it has already done to the residential market… making standby power reliable, yet affordable. Protect your revenue stream by investing in a GUARDIAN Elite™ commercial automatic standby generator. Our GUARDIAN Elite generators are ideal for a broad range of enterprises, including restaurants, convenience stores, supermarkets, banks, fitness centers, hotels, and retail outlets.

Three-phase models range from 20-150 kW and single-phase models from 60-150 kW. They run on either natural gas or LPV, feature automotive style, liquid-cooled engines, GUARDIAN’s exclusive Whisper-Test™ feature and a corrosion-resistant aluminum enclosure option. 

Whisper Quiet Operation
GUARDIAN’s exclusive patent-pending Whisper-Test low speed exercise feature makes our GUARDIAN Elite products the quietest liquid-cooled generators on the market. Whisper-Test reduces noise by 50% during the generator’s weekly self-test cycle allowing for near silent operation that satisfies all know sound ordinances. 

Value Priced
During a utility outage, a GUARDIAN Elite will protect your revenue stream and prevent expensive losses by keeping your business… in business. Not only are our products engineered for reliability and long life, our volume production and short lead times make GUARDIAN Elite products an even better value.
Liquid-Cooled Engine: Produces more electricity for longer outages Whisper-Test™: Patent-pending, self-test feature makes the GUARDIAN Elite 50% quieter during the generator’s weekly self-test cycle Aluminum Enclosure: Corrosion-resistance for coastal communities (60 kW and higher)  Longest Life Expectancy in the Industry: Over 3,000 hours of run time Superior Paint: Tough, textured powder coat paint finish for unmatched durability and all weather protection UL Listed: For safety and certified power ratings  Clean Burning Fuel: Natural gas or LPV


Automotive Engine
GUARDIAN Elite™ generators use modified automotive engines that can easily be serviced using readily available, cost-effective parts. These engines are produced in high volume allowing to pass along the cost savings to our customers.

Whisper-Test™
Reduces noise to a whisper by lowering engine speed during the generator’s weekly self-test. The Whisper-Test sound level is comparable to a car at idle and is 50% quieter than the competition.

Superior Paint
New textured, powder coat paint process provides consistent coverage and better bonding to seams and exposed edges. This ensures greater durability and a longer lasting finish.

Aluminum Enclosure
GUARDIAN Elite generators are available in a corrosion-resistant aluminum enclosure to better withstand the elements. This option is especially important for businesses in southern and coastal communities.

Automatic Exerciser
An automatic seven (7) day test of your system allows you to verify that your generator is in peak operating condition at all times.

Automatic Transfer Switch
The automatic transfer switch automatically switches the source of power from utility to the generator within seconds of a power outage. Because it’s automatic, you never have to flip a switch.

Convenient Fuel Supply
GUARDIAN Elite generators operate on natural gas or LP gas service. This provides you with unlimited run time during extended utility power failures.

Maintenance Friendly
GUARDIAN Elite generators feature large, removable doors. This provides easy and quick access for servicing and maintenance.

Automatic Safety Shutdowns
Automatic safety shutdowns protect the engine and generator in the event of low oil pressure, high temperature, overspeed and/or overcrank.

Protective Enclosure
The enclosure protects your generator from harmful weather and includes key locks for security. Sound-absorbing panels also reduce exterior noise levels.

Battery Charger
A built-in battery charger ensures that the battery remains at an optimum performance level.

UL-Listed
For your safety, GUARDIAN standby generators are UL 2200 listed and all transfer switches are UL 1008 listed. This validates safety and kilowatt ratings.

EPA and CARB Emission Requirements
Generators up to 25kW must comply with EPA and CARB emissions requirements. All GUARDIAN generators up to 25 kW meet these requirements.Generator Set


Generators 
20kW - 1.5L
25kW - 1.6L
35kW - 2.4L
45kW - 2.4L
60kW - 3.0L
70kW - 6.8L
80kW - 4.6L
100kW - 5.4L
100kW - 6.8L
130kW - 6.8L
150kW - 6.8L
GUARDIAN spec sheets are available to download as Adobe Acrobat PDF files. Click on the PDF link to view the document.

Control Panels
R-100 Control Panel
H-100 Control Panel 
 
Transfer Switches
RTS Automatic Transfer Switch
HTS Automatic Transfer Switch


What is an automatic standby generator?
An automatic standby generator is a back-up electrical system that operates whether you are at your property or away. It automatically supplies power to essential circuits of your building within seconds of a utility outage. After utility power returns, the generator shuts itself off and awaits the next outage. It operates on natural gas or liquid propane and usually is installed outside at ground level or on the roof.

What will it power?
GUARDIAN® generators supply electricity to the electrical panel circuits of your property through an automatic transfer switch. You can elect to back up selected emergency circuits or your entire facility. A GUARDIAN Dealer or electrician can calculate the amperage of items you want to protect and match it to the appropriate generator system. Our liquid-cooled models range from 20-150 kW (single and three phase) and are ideal for larger homes, small businesses and commercial applications.

Why should I buy an automatic standby generator instead of a portable generator?
While portable generators do supply power, an automatic standby generator produces a higher quality of electricity. It operates automatically and runs a weekly self-test to ensure proper response to an outage. There are no extension cords to plug in and no gas tanks to fill. It operates automatically so it protects our property even when you’re away. When utility power returns, the standby generator shuts itself off.

What’s the difference between air-cooled and liquid-cooled?
Air-cooled units use engines we design and manufacture specifically for our smaller generators. Volume production helps us to keep cost down, making our air-cooled generators the most affordable for our customers. They cover essential circuits and back-up power needs in most residential applications. Liquid-cooled units use automotive engines for increased horsepower. This makes them ideal for larger requirements such as whole-house power coverage, larger homes and commercial applications.

Do they have to be maintained?
Just like your car’s engine, generators need periodic oil and filter changes. Many customers rely on GUARDIAN’s preventative maintenance kits (models up to 45 kW) to satisfy routine maintenance requirements. Refer to your owner's manual for routine maintenance procedures and schedules. Kits can be purchased through the business that sold you your GUARDIAN generator.

What is the advantage of an aluminum enclosure?
Aluminum is corrosion resistant, so it prolongs the life and look of the generator, particularly in salt air communities.

What is Whisper-Test™?
Whisper-Test is a feature that reduces noise by 50% during the generator’s weekly self-test cycle. That makes it as quiet as a car idling in your driveway. The generator starts up and operates at a reduced speed, lowering sound output by as much as 12 decibels for units that normally run at higher speeds under load. This allows for near-silent operation in test mode and satisfies all known sound ordinances.

How do I select a generator that’s right for me?  (Generator Size Calculator)
The most accurate way is to have a licensed electrician perform a site survey to determine the size and voltage of the unit to meet your backup power needs. 

How long does it take to install an automatic standby generator?
Liquid-cooled generators normally require up to 14 hours, over two days, to install. Because of their additional weight, liquid-cooled units must be installed on a stronger mounting surface such as a concrete slab.

Note: Time estimates are based on typical applications. Additional time may be required to run gas conduit or gas piping or to place the unit far from the incoming gas or electrical service.How much fuel does an automatic standby generator use?

7-16 kW Air-Cooled 20-45 kW Liquid-Cooled 60-150 kW Liquid-Cooled
Natural Gas (cu ft/hr) 100-250 300-750 960-2061
LP (cu ft/hr) 50-90 120-300 375-830
Please refer to the individual model’s specification sheet for exact figures.

Note: Figures are based on continuous operation at full load. It is unlikely that the generator will run at full load for an extended period, therefore, consumption decreases accordingly.What transfer switch do I need?
Liquid-cooled models up to 60 kW require RTS transfer switches (100-400 amps), while 70-150 kW models require HTS transfer switches (100-800 amps).

Where can I purchase parts?

What is the cost of a service/maintenance contract?
Costs are determined by the installing dealer and are based upon service levels. Cost will also vary based on hourly labor rates in your local area.

What type of oil is recommended?
15W-40 is recommended for all liquid-cooled units. The oil should be a SAE rated high detergent oil that meets API Service Class SF requirements for gasoline engines. 

Propane tanks are usually rated by pounds. Is there a conversion that can be applied to the fuel consumption numbers?
Yes. For general conversion, propane weighs 4.24 pounds per gallon. 1 lb. = 8.58 cu. ft. 1 gallon = 36.39 cu. ft. 

Where do I go to have warranty repairs performed?
Any Authorized GUARDIAN Service Center can perform warranty service. 

Where is my Generator made?
GUARDIAN generators are made in the United States. Manufactured in Wisconsin by Generac Power Systems Inc., we design and build our complete product from the controls to the enclosures. This ensures that our products are built to our highest standards.


Warranties Applicable to:Warranty TypeWarranty CoveragePDF
Liquid-cooled Units (45kW and below) Standard 2 Year Warranty
Liquid-cooled Units (50kW and above) Standard 2 Year Warranty 
GUARDIAN warranty policies are available to download as Adobe Acrobat PDF files. Click on the PDF link to view the document.

Transfer Switch
7 LED Indicator Lights Standard
High Temperature Shutdown Standard
Low Coolant Level Shutdown Standard

Automatic Voltage Regulator with Over-voltage Protection Standard
Voltage Regulation (at steady state from no load to 100% load ± 1.0 %
Frequency Regulation (at steady state from no load to 100% load) ± 0.5%
Engine Start Sequence Cyclic Cranking: Initially 15 sec. on, then 7 sec. rest, 7 sec. on. 90 sec. maximum duration
Safety Fuse Standard
Starter Lockout Starter cannot re-engage until 5 sec. after engine has stopped
2 Amp Battery Charger Standard
Engine Warm-up 10-15 seconds
Engine Cool-down 1 minute

Mode Switch
Auto Position Utility Failure / 7 day exerciser
Off Position Stops unit. Power is removed. Control and charger still operate.
Manual/Test Position Start with starter control, unit stays on. If utility fails, transfer to load takes place
Automatic Weekly Exerciser with Selectable Low Speed Exercise Standard
Note: Prior to choosing a generator size, always check the manufacturers power requirements. This will help to ensure power accommodations for appliances or equipment that cycle during operation.


The transfer switch monitors utility power and signals the generator to start when utility power is interrupted. When utility power returns, the transfer switch returns the electrical load from the generator back to the utility. This ensures your most important electrical loads are powered, within seconds, even when you’re away.

The transfer switch is the difference between a truly automatic generator set and just another generator. No toggles to flip, no knobs to turn, no extension cords to run when you lose utility power. You will have the comfort and peace-of-mind knowing that your GUARDIAN standby generator does everything for you... automatically.

Suggested Transfer Switch
When choosing a transfer switch, you must match or exceed the generator output amperage. The following table illustrates a suggested transfer switch to use with each generator. The transfer switch to be used is based on the kW rating and voltage of the generator. All GUARDIAN transfer switches are UL 1008 Listed to meet safety and performance standards.


kW Engine 120/240, 1Ø 120/208, 3Ø 277/480, 3Ø
20 1.5L N/A RTS 100 amp N/A
25 1.6L N/A RTS 100 amp N/A
35 2.4L N/A RTS 200 amp RTS 100 amp
45 2.4L N/A RTS 200 amp RTS 200 amp
60 3.0L RTS 400 amp RTS 400 amp HTS 100 amp
70 6.8L HTS 300 amp HTS 300 amp HTS 150 amp
80 4.6L HTS 400 amp HTS 300 amp HTS 150 amp
100 5.4L HTS 600 amp HTS 400 amp HTS 200 amp
100 6.8L HTS 600 amp HTS 400 amp HTS 200 amp
130 6.8L HTS 600 amp HTS 600 amp HTS 200 or 300 amp
150 6.8L HTS 800 amp HTS 600 amp HTS 300 amp
RTS 100-400 AMP (spec sheet)
These transfer switches are designed for a wide variety of applications that require up to 400 amps. RTS transfer switches are used with GUARDIAN generators that utilize a 3.0 liter engine or smaller. For larger generator engines, an HTS transfer switch must be used.

HTS 100-800 AMP (spec sheet)
These transfer switches are designed for simple monitoring, operation and maintenance. Common controls and LED lights are conveniently located on the front door panel. All components are front adjustable and removable for serviceability. HTS transfer switches can only be used with generators that utilize engines over 3.0 liters.

Installation Drawings

GUARDIAN Power RatingBulletin Number
7, 10 & 13 kW Air-Cooled0F9424
40 kW Liquid-Cooled (California Emissions)0D5335


GUARDIAN QuietSource Power RatingBulletin Number
16 kW Air-Cooled0F9424


GUARDIAN QuietSource Liquid-Cooled (20-45kW) and
GUARDIAN Elite Commercial Series Liquid-Cooled Power Rating:
Bulletin Number
20kW0F7555
25kW0G1044
35kW and 45kW0G0325
60kW0F9577
70kW0F6287
80kW thru 150kW0F6289

 

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