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Customer questions and answers for
Generac Power Systems GP5500

The GP5500 has enough power for emergency use, when you’re not using it for outdoor recreation and DIY projects.
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Customer questions and answers for Generac Power Systems GP5500

Question

What is the differance?

I am interested in the GP5500 series portable generators. I found there are a few differant models, such as the 5939, 5945, 5975. Can you tell me the main differance in the model numbers?
State: MA - Massachusetts
Age: 55-64
asked 4 years, 10 months ago
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Undecided
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All of these units are functionally the same. Model #5939 is for sale in all U.S. states except for California, which has more stringent emissions requirements. Model #5945 meets those requirements for use in California. And model #5975 meets Canadian emissions requirements.
answered 4 years, 10 months ago
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GeneracPowerSystems
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Question

product testing

Do you guys test each generator before shipping to retail? I was looking at a GP5500 at a store and there appears to be a little gas and oil residue in the unit and i'm trying to determine if the unit was bought by a consumer and returned to the store.
asked 4 years, 10 months ago
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justin
on GP5500
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answer 1
Yes, Generac tests every generator before it ships. While we can't guarantee that this is not a returned unit, the residue you mention is most likely from that testing phase.
answered 4 years, 10 months ago
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Question

What is the difference betweenthe 5500 model 5738 CSA and Model 5939

State: NH - New Hampshire
Age: Over 65
This purchase was for: Home Backup Power
asked 4 years, 10 months ago
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cg
New Hampshire
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Both units are functionally the same. Model #5738 meets emissions standards for sale in Canada, and model #5939 is for use in all U.S. states except California, which has more stringent emissions requirements. Model #5737 has been designed to meet those California emissions requirements.
answered 4 years, 10 months ago
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Question

noise level

How many decibels is it?
State: NY - New York
Age: 35-44
This purchase was for: Home Backup Power
asked 4 years, 10 months ago
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Doug
Ulster county
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We do not list the decibel (noise) rating of our portable generators. This is because there is no industry standard for testing decibel ratings on portable generators. Therefore, any results can be misleading or inaccurate.
answered 4 years, 10 months ago
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Question

What grade of gasoline should be used in a GP5500?

I was told regular gasoline causes small engines to run too hot and causes valve / head failure. Is there any truth to this?
State: NJ - New Jersey
Age: 45-54
This purchase was for: Home Backup Power
asked 4 years, 10 months ago
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Felix the Cat
Franklinville
on GP5500
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answer 1
This is not true. We perform all of our testing using standard 87 octane fuel. We recommend using E90 or higher. For specific fuel recommendations, please see the owner's manual at http://goo.gl/mDGCq
answered 4 years, 10 months ago
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Question

Exceeding maximum wattage capacity.

My house is in a development with no natural gas service, and as such is all-electric (heat pump, stove, water heater) with the usual appliances, computers, TV's, etc.. Losing central air conditioning is an inconvienience in the summer, but losing heat for an extended period (an hour or more) during freezing weather is more serious. Is this model up to the task in a northern climate, or should I be considering buying one of GP7000, or 8000-watt capacity?
State: PA - Pennsylvania
Age: 55-64
This purchase was for: Home Backup Power
asked 4 years, 10 months ago
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Fed up with outages
Philadelphia suburb
on GP5500
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answer 1
We recommend discussing your current situation with a Generac dealer who can accurately assess your future electrical needs and make a specific recommendation. You can find one near you at http://www.generac.com/Service/Deal.... However, we do suggest you consider a permanently installed automatic home backup generator. It can run on LP fuel, and is actually a better solution in a power outage than a portable generator. To learn more, visit http://www.generac.com/Residential/ and be sure to discuss this option with your Generac dealer.
answered 4 years, 10 months ago
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GeneracPowerSystems
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Question

what is the difference between model # 5738 and model # 5939

State: NH - New Hampshire
Age: Over 65
This purchase was for: Home Backup Power
asked 4 years, 10 months ago
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cg
new hampshire
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answer 1
Both models are functionally the same. Model #5738 is designed to meet emissions requirements in Canada. Model #5939 is intended for use in all U.S. states except California, which has more stringent emissions requirements. For use in California there is a third model--# 5737.
answered 4 years, 10 months ago
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Question

since the gp5500 doesn't have a GFCI ciruit, can i add one via an extension cord with a built-in GFCI cicuit?

State: MA - Massachusetts
Age: 35-44
This purchase was for: Home Backup Power
asked 4 years, 10 months ago
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Trex
BOSTON
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answer 1
Yes, that is an acceptable solution.
answered 4 years, 9 months ago
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GeneracPowerSystems
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Question

What is the difference between Model 5939 and Model 6110 sold at Lowes

Also the hour meter does not work and there is NO reset button as indicated in the manual.
State: NH - New Hampshire
This purchase was for: Home Backup Power
asked 4 years, 9 months ago
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Handyman
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answer 1
Functionally these two units are the same. However, model 6110 sold at Lowe's stores includes a 20' power cord.

New hour meter instructions have been added to the manual; there was an error in the manual when it was first printed. This has been resolved and the updated manuals are now available on our website:

• 5939 owner's manual - http://goo.gl/EB58B
• 6110 owner's manual - http://goo.gl/TWtkT

If you continue to have issues with your hourmeter, please call 888-GENERAC and our customer support team will be able to work with you to resolve this issue.
answered 4 years, 9 months ago
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Question

Can a gp5500 be converted to run on propane?

Does generac offer a vapor propane set up for this model?
asked 4 years, 9 months ago
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douglas123
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answer 1
Generac does not offer a propane conversion kit for its gasoline-fueled generators. However, you might want to consider Generac's LP3250 portable generator. It's the only portable generator on the market that integrates a 20-lb LP fuel tank into the chassis, making it extremely portable. It was even featured on The Today Show (see the link below). To learn more, please visit http://www.generac.com/Portables/LP...
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answered 4 years, 9 months ago
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Question

For how long can the GP5500 be run continuously, only stopping for gas refuel?

Will be without power in Northeast for a week or more - don't want to run generator to death if it needs a rest.
State: NH - New Hampshire
Age: 55-64
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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Dennis
Merrimack
on GP5500
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answer 1
If the generator is in good working order, you should be able to run it until utility power returns, even if that means a week or more. We do recommend turning the unit off to refuel; that is simply a safe practice. We would also recommend checking the oil level every time you turn the unit off to refuel, and making sure that the oil is filled to the appropriate level. Also make sure that you're using the correct weight oil for the ambient operating temperatures. For all procedures regarding fuel and oil filling, please see the owner's manual at http://goo.gl/WrqNd.
answered 4 years, 8 months ago
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GeneracPowerSystems
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Question

Storage of My GP5500

OK so I understand the need for fresh gas to properly operate any gas engine, such as the one in my generator. Stabilizers are required if you do not drain the gas the clean the carb.

However, is there any concern with the electronics of the actual generator? It has been suggested that to ensure long life of the generator that it should be allowed to generate power every month of so.

Your thoughts on storage?
State: MA - Massachusetts
Age: 55-64
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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Mark
Norfolk
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We recommend operating the generator periodically even if there is not a specific need just to ensure that the unit will start and operate properly when it is needed. Our automatic home backup generators "exercise" once per week for this very purpose. You need not run your portable generator as frequently as this, but perhaps once every few months. There is value in the peace of mind this will give you--knowing the unit will function when you need it most.
answered 4 years, 8 months ago
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Question

Which oil type should I use if the temperature will be between the ranges specified in the owner's manual?

Currently, our daytime temps are in the 50's, but night temps in the 30's. Which grade oil should I use? The manual lists for >40F and for <40F (down to 10F). I'm not sure which grade I should use in this situation.
State: PA - Pennsylvania
Age: 35-44
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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Eric
Milford
on GP5500
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Given your current daytime temperatures, you should be fine using SAE 30. Once your temperatures are consistently at or below freezing, we recommend changing the oil to 10W-30 or a synthetic 5W-30 depending upon just how cold those temperatures are consistently.
answered 4 years, 8 months ago
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GeneracPowerSystems
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Question

Extended fuel capacity

Can I purchase a larger fule tank or add an auxilliary fuel tank to get longer runtimes between fillings? Thanks!
State: MA - Massachusetts
Age: 45-54
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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mdombros
Lancaster
on GP5500
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answer 1
Generac does not manufacture auxiliary fuel tanks for its portable generators, and does not recommend adding auxiliary fuel tanks as there is a risk of spilling fuel if connectors are incorrect or installed improperly. For running times that will last as long as necessary until power returns, we recommend considering a Generac automatic home backup generator.
 
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answered 4 years, 8 months ago
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Question

Fuel overflows when refueling.

When refueling, the strainer fills and overflows unless you pour very slowly. Seems like there should be some kind of vent to release back pressure from tank. Others I have seen have vent slots or holes in the neck between the cap and strainer.
State: NJ - New Jersey
Age: 55-64
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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George
Northern NJ
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answer 1
Thank you very much for taking the time to share this feedback with us. We have passed your comments on to our product development team.
answered 4 years, 7 months ago
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GeneracPowerSystems
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Question

Does the GP5500 need to be grounded with a grounding rod?

I've recently purchased a new unit and want to be prepared the next time power is lost. I've been told to make sure I attach the generator to a grounding rod when I need to use it. Is this true?
State: MD - Maryland
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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SN
Baltimore
on GP5500
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Yes, we do recommend grounding the generator. This advice, from the owner's manual:

"The National Electrical Code requires that the frame and external electrically conductive parts of this generator be properly connected to an approved earth ground.

Local electrical codes may also require proper grounding of the unit. For that purpose, connecting a No. 10 AWG (American Wire Gauge) stranded copper wire to the grounding lug and to an earth-driven copper or brass grounding rod (electrode) provides adequate protection against electrical shock. However, local codes may vary widely. Consult with a local electrician for grounding requirements in the area.

Proper grounding of the generator will help prevent electrical shock in the event of a ground fault condition in the generator or in connected electrical devices. Proper grounding also helps dissipate static electricity, which often builds up in ungrounded devices."
answered 4 years, 8 months ago
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Question

quiet muffler for GP5500

do you offer a quieter muffler for this unit .. it is way tooooo loud. there must be something I can do to turn down the noise???
asked 4 years, 8 months ago
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mark
on GP5500
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At this time, Generac does not offer any accessories to reduce the noise level on any of our portable generators.
answered 4 years, 7 months ago
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GeneracPowerSystems
-4points
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Question

tri-fuel conversion kit

I want to convert my gasoline driven generator to a tri-fuel generator.
State: MA - Massachusetts
Age: 45-54
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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gbonafilia
Holyoke
on GP5500
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Generac does not recommend a conversion of this type. Such a conversion would also void the warranty.
answered 4 years, 8 months ago
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GeneracPowerSystems
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Question

Can the GP5500 be converted for use with natural gas?

State: OR - Oregon
Age: 35-44
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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rc
Sandy
on GP5500
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At this time, Generac does not offer any accessories or conversion kits for its portable generators to run on natural gas. We also do not recommend such conversion, for safety and performance reasons. If you are considering a natural gas generator, we recommend Generac's CorePower automatic home backup generator. This unit runs on your home's existing natural gas fuel supply, is connected directly to your home's electrical system, and turns on and off automatically in the event of a power outage. With an MSRP of $1799, it is comparable in price to many larger portable generators, but offers you the benefits of an automatic home backup solution.
 
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answered 4 years, 8 months ago
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Question

Operating Computer Equipment / Sensitive Electronics

Is the GP5500 recommended at all for the operation of computer type electronic devices? I ran it for one week during this past storm outage and during that time it seems that my adding machine had an issue and stopped working. As I have already purchased it, if it is not recommended for this use, is there some sort of line conditioner that can be placed in line before it is used in my home? As I rent this home, there will be no permanent installation with the exception of a manual transfer switch. Thank you.
State: CT - Connecticut
This purchase was for: Home Backup Power
asked 4 years, 8 months ago
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Far2hip
on GP5500
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The GP Series portable generators have a track record of safely and effectively powering appliances and electronics of all kinds. However, a line conditioner can be placed in line before the power goes to your home. You can select line conditioners from your local electronics wholesaler or retailer.
answered 4 years, 8 months ago
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