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Generac 5943 - GP7500E 7500 Watt Electric Start Portable Generator

Generac Electric Generators and Accessories
Model: 5943
(Based on expert analysis, manufacturer ratings and customer reviews)

4.7 out of 54.7 out of 54.7 out of 54.7 out of 54.7 out of 5
348 Reviews
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  • Features
  • Specs
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  • 348
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Run Watts
Rated Watts
Surge Watts
Starting Watts

Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Portable Emergency Generator
Energizes mission-critical appliances - except central a/c

Electric Start
Start the generator with the press of a button (battery included)

Generac OHV Engine
Splash type lubrication for improved engine life

Low Oil Pressure Safety Shutdown
Protects the engine and generator from lack of lubrication

Steel Gas Tank w/ Fuel Gauge
Durable gas tank with offset filler tube to minimize spillage

Heavy-Duty Cradle
1-1/4" diameter hardened steel frame to protect it from damage

Portability Kit
Oversized wheels with Never-flat technology
Heavy-duty fold-down handles that lock

Hour Meter
Built-in resets remind you of scheduled maintenance

Low Tone Muffler
Minimizes noise levels and maintains neighborhood sanity
Engine Brand
Starting System
12-Volt Button Start w/ Recoil
420 CC
Consumer Engine Warranty
2 Years
Commercial Engine Warranty
1 Year
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
Cast Iron Sleeve
Product Specs
120/240 Single-Phase
60 Hertz
Auto Voltage Regulation
Surge Watts
9375 Watts
Rated Watts
7500 Watts
Fuel Type
Rated Amps
31 @ 240 Volts (Single Phase) Amps
Portability Kit
Never Flat Wheels
Tank Size
8 Gallons
Run Time @ 50% Load
12 Hours
Fuel Tank Material
Fuel Gauge
Decibel Rating @ 7m
Not Measured by Manufacturer
Idle Control
Hour Meter
Voltage Meter
Lifting Eye
NEMA 5-20R - Wall-Type
NEMA L14-30R
Made in USA
Assembly Required
201 Pounds
Product Length
27.25 Inches
Product Width
27 Inches
Product Height
25 Inches
Consumer Warranty
2 Years
Commercial Warranty
1 Year
Download Documents

NEMA 5-20R (Wall-Type)
NEMA 5-20R (Wall-Type)

NEMA L14-30R
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*Ask Jared about the Generac 5943. Sorry, no repair questions:




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  16 Questions
Q: Is this generator electronics friendly? Do you know the specs for Total Harmonic Distortion (THD)?
by Dan from Michigan on January 06, 2014

A: Thanks for your inquiry.

The factory doesn't publish the THD% for this series. My recollection from our training was that they were in the "15-20%" threshold which would make them not suitable for sensitive electronics.

Outside of Honda presently, I haven't seen many portable synchronous generators that are any better as most are 15% or greater with their capacitor excitation. Of course, the Honda 6500 watt is twice the cost.

by Jared, Product Expert
Q: I was interested in buying the Generac GP17500E. I did my homework and believe it is the one for me. The questions I have are:

1. Can I convert it to propane?

2. How long will a 15lb propane tank last on this generator if I'm not powering the whole house and just the bare necessities?

Thank you Ryan

by Ryan from New York on October 16, 2013

A: Thanks for your inquiry.

We at Power Equipment Direct do not recommend converting your gasoline portable generator to an alternative fuel and doing so will void the manufacturers warranty and may cause damage to the generator itself. These conversions are not recommended by any of the generator manufacturers.

Gasoline has an Ignition Point of 475536 F. When a generator is manufactured to run solely on gasoline these temperatures are taken into consideration and the engine components are made to handle these temperatures.

Propane (LP) has an Ignition Point of 920-1020F and Natural Gas (NG) has an Ignition Point of 9001500F. These higher temperatures will cause damage over time on any gas only powered engine.

The following guidelines cover Honda engines (Also applies to other engine manufacturers) modified to run on fuels other than the one for which they were designed, such as converting an engine to run on propane (LP) or natural gas (NG).

Honda gasoline engines are certified to operate on unleaded fuel with a pump octane rating of 86 or higher, containing no more than 10% ethanol (E10).

Any change to the original configuration of a certified Honda engine is a potential violation of the Clean Air Act prohibition against tampering (40 CFR 1068.101(b)(1)). The tampering prohibition is important because poorly designed and installed modifications can increase emissions.

The Clean Air Act prohibits anyone from removing or rendering inoperative any device or design element installed on engines in compliance with regulations. These actions are considered tampering, which carries a civil penalty up to $37,500 for each engine or equipment in violation.

Engines converted by a third party (OEM, dealer, converter, etc.) to run on a different fuel type must be recertified with the EPA on the new fuel to comply with applicable emission standards. The third party must recertify under a new family and notify Honda to not include the modified engines in the original family.

Converted engines to be sold for use in California must meet CARB requirements and the converter must obtain approval from CARB. EPA certificates or tampering exemptions will not satisfy the requirement for CARB certification.

Once certified, the third party must remove the Honda emission control label and apply a compliant emission control label for the new fuel indicating the new certifying manufacturer. Honda will no longer assume any responsibility as the certifying manufacturer.

The Honda Distributor's Limited Warranty does not extend to parts affected or damaged by the conversion to or use of fuel other than the fuel for which the engine was originally designed.

Honda offers V-twin engines specifically designed and certified for use in LP/NG applications. The engines incorporate special design features that address the higher combustion temperatures and reduced lubrication to the valve guide area (since it is a dry fuel, not liquid). Please contact your sales representative or distributor for additional information.

Disclaimer: The guidance provided is intended for Honda dealer/distributor informational purposes only and not for the purpose of providing legal advice. You must contact the appropriate certifying agencies if you require information on how regulations apply to your specific application.

The regulations and additional information can be found at these web sites:



The run times will always vary based on the actual load put on the generator.

by Jared, Product Expert
Q: hi, i purchaed a Generac 7500 E from you recently. i was looking to see what type of Oil i need to purchase ? is it 2 cycle or 4 cycle ? or neither ? please let me know , thanks
by Brett from New York on January 28, 2013

A: The unit uses a standard motor oil (4-cycle) and you will need to refer to the chart in the owner's manual for the recommended viscosity. Unit comes with SAE 30 weight oil and most applications use 10W-30.

Per Section 2.7.1 of the manual:

"All oil should meet minimum American Petroleum Institute (API) Service Class SJ, SL or better. Use no special additives. Select the oil's viscosity grade according to the expected operating temperature (also see chart)."

• Above 40 F, use SAE 30
• Below 40 F and down to 10 F, use 10W-30
• Below 10 F, use synthetic 5W-30
by Jared, Product Expert
Q: Looking at the 7500E and wondering what is the type and rating of the Battery, Lead Acid , NiCad Metal Hydride?? Cost of replacement??
by Bob Vandegrift from Virginia on September 03, 2012

A: They use lead acid batteries that are AGM, sealed batteries. These typically cost between 40-50 if they need to be replaced & can be sourced from a Batteries Plus or an InterState battery store.
by Jared, Product Expert
Q: I am looking at a Generac 5943 7500 Watt generator. It is rated at 31 amps. Can I install a 30 amp 10 circuit transfer switch or do I need to go to a 50 amp transfer switch? The transfer switch is 150 ft away from the generator. Will 10 guage 4 conductor wire be adaquate or do I need to go to 8 guage 4 conductor wire?
by Dick Heaton from Massachusetts on August 04, 2012

A: You would need to go with 30A accessories to connect to the Generac model 5943. The largest outlet on the generator is 30A and that is what you match your accessories to.

You will definitely need to go to a larger gauge wire but still may have some voltage drop due to the distance.

Please consult with a certified electrician for installation and wire sizing assistance.

by Jared, Product Expert
Q: My electrician recommended getting a generator of 7500 or 8000 running watts. Does the 5943 qualify?

What is a "float charger"? Does this model have it?

Does the battery charges when it is running?

by Gary Stauffer from Virginia on July 14, 2012

A: Model 5943 is a good choice to meet your electricians recommendation.

A float charger allows you to keep the charger plugged in all the time where it will charge the battery when it gets low and stops charging when it is fully charged and won't over charge the battery.

Model 5943 does not come with a float charger. The charger supplied can only be plugged in for a max of 48 hours.

This is because you should start the generator weekly and if the battery seems low you can charge it with the supplied charger. This keeps the engine lubricated and ready to use when needed.

The generator does not charge the battery when it is running.
by Jared, Product Expert
Q: What"s the warranty on the Generac Model 5943?
by Terry Pfaff from Michigan on March 11, 2012

A: Consumer Warranty: 2 Years
Commercial Warranty: 1 Year
by Jared, Product Expert
Q: How many amps on 240 volt receptacle ??
Thanx, Jim

by Jim Mothershead from Maryland on February 07, 2012

A: You can find the maximum amperage rating listed in the specs section on the product page.

31 Amps @ 240 Volts (Single Phase)

by Jared, Product Expert
Q: What type/style of battery comes with the Generac 5943? I would like to know what type of a battery charger/maintainer the battery would require. I am thinking about a BatteryMINDer Charger/Maintainer/Desulfator - 1.3 Amp, 12 Volt, Model# 12117. This one is not recommended for deep cycle batteries.
by Tom Wagasky from Ohio on January 20, 2012

A: Generac does not provide the Group number for the battery that comes with the generator. It is listed as a 12V with 10Ahr and the generator comes with a batter charger already.

You can confirm with Generac customer support at 888-436-3722.

by Jared, Product Expert
Q: Is this model made in America?
by L Carr from Indiana on January 06, 2012

A: The engines are produced overseas and the generators are put together in Wisconsin at their facility.

If you are looking to purchase American made only then you need to look at the Generac XG & XP models which are entirely built in Wisconsin.

Generac Portable Generators

by Jared, Product Expert
Q: I just bought this generator form EGD and wand to know if it has a Voltage Regulator? and also would like to know if you recommend Synthetic Oil?Thanks John P>S I just orderd it 10-9-11 I paid more for it on your site then other sites but your site seems more profesional & provides more information.
by John Eichinger from New Jersey on October 10, 2011

A: John,

Per Generac their GP models do have Voltage Regulation and the recommended oil per Generac is based on temperature in your area and can be found in the owner's manual. If you are in a colder climate then synthetic oil is ok to use.

by Jared, Product Expert
Q: We are interested in the Generac 5943. We want to utilize a transfer system to power our fridge/freezer, submersible water pump, and enough lights to keep us from "breaking legs" in an emergency. Our home is 2800 sq ft. Do we need to accessory kit, or anything else? Are we "over killing" mode or are we on the right track?
by Charles McDonald from Connecticut on August 31, 2011

A: You're on the right track. The Generac 5943 is a great choice to power a small home.

With a transfer switch, it can energize 10-circuits in your home. Just doesn't have the strength to power a central air conditioner.

Here's a link to the Power Transfer System that we recommend with this unit:

Reliance Controls 30-Amp Power Transfer System
by Jared, Product Expert
Q: I planning to get a generator and, with a proper interlock, backfeed into my panel. I'm considering the Generac 75000E. It has a 240-volt 30-amp receptacle. Do any of these other generator have a receptacle greater than 30 amps in the same price range.
by Mike from Pennsylvania on August 31, 2011

A: First things first, NEVER backfeed into your panel!

This article explains what happens when you do:

How NOT to Connect a Portable Generator

Secondly, consider getting a Power Transfer System to connect to the generator.

How to Pick the Perfect Power Transfer System

Finally, this generator has a 30-amp outlet because it produces approximately 30-amp of power.

If you want a generator with a 50-amp outlet, you'll need a bigger generator around 10- to 17.5-kilowatts.
by Jared, Product Expert
Q: I just bought this generator from your company and am expecting it any day. I now need a transfer switch to accompany the generator. I am looking at the Reliance Controls 31410CRK switch. Will this compliment the generator and be sufficient?
by Pete Leclerc from Rhode Island on August 31, 2011

A: You chose wisely.

The 31410CRK is the perfect companion to this generator because it features 10-circuits.

Reliance Controls 3140CRK
by Jared, Product Expert
Q: Im looking at getting an emergency generator for storm/hurricane outages we have here in the Houston area.

It is for an 1800 sq-ft house. Id like to power as much of the house as possible to continue normal life as much as reasonable. I understand I wont be able to power the central A/C. Instead Ill have an 8000 BTU portable A/C unit Id like to power (about 1100 watts).

So, in general, the main things Id like to run are:
o Refrigerator
o Portable A/C
o 3 ceiling fans
o Microwave
o Washer
o Gas dryer
o Computer and TV
o Miscellaneous lights

Id like to power at least 6 single-pole circuits. 8 would be better, and 10 would be ideal (that would power all my circuits in the house). I dont need to power any double-pole circuits.

My main service panel is mounted outside, on the back of my house. Putting a transfer switch indoors would be quite involved. So mounting outside is desired.

The Generac 5943 GP7500E 7500 watt looks like it would fit what Im looking for.

Do you agree? What would you recommend for a manual transfer switch and/or any other items I need in order to get this set up right?

by Steve Collins from Texas on April 18, 2011

A: Steve,

The 7500watt generac is a good unit for basic needs. The main thing to understand is that you will have to manage your loads and this is best accomplished by using a manual transfer panel (outdoor) which would be mounted after your meter but before your main panel. This allows you to manage your entire panel (making sure you do not overload) by selecting the circuits you want to run as certain times. The link below is a model I recommend for this to be done. Please have certified electrician install this system due to the nature of the install.

Manual 200A Outdoor Transfer Panel

Manual 100A Outdoor Transfer Panel

by Jared, Product Expert
Q: I just received the generator I purchased from you (Generac GP5500 - 5500 Watt Portable Generator) and it comes with a bottle of oil. It does not say on the bottle what type it is. 30 weight or 10w30? Do you know so that it is the proper oil to use for the current temperature.
Thanks, Larry

by Larry from Ohio on March 26, 2011

A: Generac uses 10W30 in their kits that get sent with the portable generators.
by Jared, Product Expert
Generac 5943 Reviews & Ratings
Overall Rating
4.7 out of 54.7 out of 54.7 out of 54.7 out of 54.7 out of 5
Easy To Use (64)
Price (44)
High Quality (42)
I'd Buy It Again (29)
Easy To Store (29)
Heavy (19)
Unreliable (6)
Loud (5)
Expensive (4)
Low Quality (3)
95% of respondents would recommend this product to a friend
348 Reviews  Sort by 
Jared, the Portable Generator Expert
Electric Generator Expert

Product Expert
Total Reviews
103 Reviews
Total Helpful Votes
9201 Helpful Votes
Electric Generators Direct Recommended

We like the Generac 7500 watt portable generator for four reasons.

1. Electric Start
Generators are often hard to start with a recoil rope. This Generac generator comes conveniently equipped with an electric start button and a battery. Simply press the button, and it starts like a charm.

2. It's Affordable

3. Low Tone Muffler
This feature reduces the noise level. If you have ever been near a portable generator while it's running, it can be very loud. This keeps the noise down.

4.... more
Jared Recommends This Model
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Darren M.
Larose, LA
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Converting To Natural Gas
I purchased this generator on 5/16/2016. I was considering purchasing a natural gas conversion kit. Is that a good idea? I've been watching YouTube videos about it but I'm unsure if this a good idea. Any insight would be helpful. Thanks
Darren Recommends This Generac Product
Jared, the Portable Generator Expert
Product Expert
Not a good idea. Any modification done to the generator will void the warranty.
Was this review helpful?
Eric Y.
Portland, NY
Purchased from Electric Generators Direct
Purchased 9/11/16
Most Helpful Critical Review
2 out of 52 out of 52 out of 52 out of 52 out of 5
Waiting Ofer 3 Months For Warrenty Replacement!
First unit worded great for months, until stolen. Ordered a second unit. It died on first use. Took it to services center. After a couple weeks, I was told a unit was being shipped. After months of run around I am still waiting on my replacement unit. Very disappointing!
Cons: Unreliable, Low Quality
Jared, the Portable Generator Expert
Product Expert
Sorry to hear about the issues you've experienced. I would suggest contacting Generac directly about the service center you're working with. Generac can be reached directly @ 888-436-3722.
Was this review helpful?
Thomas P.
Fort Lauderdale, FL
Purchased from Electric Generators Direct
Purchased 1/22/17
5 out of 55 out of 55 out of 55 out of 55 out of 5
Good Generator At A Good Price
First of all, this generator replaces a 15 year old 6500 watt Northstar Diesel generator so I had high expectations. The 7500 was simple to assemble and after adding oil and gas, it cranked right up. I connected it to the house for a couple hours under load and it performed as advertised running all the appliances except the central air. It seems to be a pretty sturdy machine although it has a few more plastic parts than I'd like. Another plus is that this generator is *much* quieter than the... more
Pros: Easy To Use, Easy To Store, Quiet
Thomas Recommends This Generac Product
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Richard H.
Waynesboro, PA
Purchased from Electric Generators Direct
Purchased 3/20/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Generac 5943 Start-up
I received the Generac 5943 by truck with power lift gate. Pretty easy assembly following the printed instructions. The battery hook-up was cumbersome, but managed to get the wires hooked up. It started up with the electric start on the first try and ran fine. 2 days later, I gave it the test run with my house. I ran my furnace fan (natural gas heat), 2 refrigerators, lights, and TV for 20 minutes. The Generac 5943 handled the load. Hope I never need it, but it's nice to know the... more
Richard Recommends This Generac Product
Manufacturer Response
Brand Rep
Thank you for providing us with your thoughtful review! We are thrilled to learn that the unit is powering up all of your desired loads! If you haven't done so already, be sure to register your unit to initiate the product's warranty. For your convenience, the registration process can be completed online via the following link: . If you have any questions, do not hesitate to contact us directly at 888-GENERAC (436-3722). Again, we thank you for your positive feedback.
Was this review helpful?
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Generator, Plenty Of Power For Price
I've been researching generators for a while and found a deal on the GP 7500. I had already calculated my necessary wattage and this unit had more than enough to run everything necessary during an outage and more. And when I say everything I mean, my water heater, tv, my fridge, microwave, my 18,000 btu mini split, my well pump, my oven, my pool pump and even my dryer.

I hear people mention they wish it was a quieter generator but most of the noise I hear is from the moving internal parts... more
Pros: Easy To Use, Price, Easy To Store, Quiet
Dave Recommends This Generac Product
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Howell P.
Albrightsville, PA
Purchased from Electric Generators Direct
Purchased 3/21/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Good Buy
We needed it 3 days after we got. It ran the everything we need it to. Well pump (220V), septic pump and the whole 1st floor of house.
Howell Recommends This Generac Product
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Michael P.
Azle, TX
Purchased from Electric Generators Direct
Purchased 5/20/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Perfect For Our Needs!
Bought this generator as a backup power source in case of local power outages and occasional use around the yard where extension cords won't reach. I've used it a few times so far and it has worked flawlessly. The electric start is a very nice feature and even if it didn't have it, the pull start was easy and started on the first pull.

The only negative feedback I have is that it's a little noisier than I'd prefer. I plan on looking into a muffler adapter that will reduce the noise without... more
Michael Recommends This Generac Product
Jared, the Portable Generator Expert
Product Expert
For generators like these, any kind of additional muffler being used will void the warranty while reducing the output of the unit.
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Dale B.
Breaux Bridge, LA
Purchased from Electric Generators Direct
Purchased 5/20/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Worked Well
The Generac 5943 handle our load very well. I connected the generator to a standby panel and put the load on . I was able to run the whole house with 2window AC units I drew 27amps and the Generac 5943 worked well. The noise level was less than our previous unit . Very satisfied.
Dale Recommends This Generac Product
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Mark Q.
Monroe, NY
Purchased from Electric Generators Direct
Purchased 3/25/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Very Happy
Delivered timely and works well.
Mark Recommends This Generac Product
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John T.
North Scituate, RI
Purchased from Electric Generators Direct
Purchased 9/1/11
Total Reviews
2 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
This Replacement Was An Improvement.
I had an older Coleman with a lot of hours on it. Hurricane Irene took power out for almost a week. That was about 3 days longer than the old unit had in it.

EGD had it in stock and even on sale despite the storm. The unit was easy to set up and get running. It has a bit more capacity than the old unit, but it runs way better so it has more power than I needed. I am upgrading the transfer switch to run more circuits. Very pleased.
Pros: High Quality, I'd Buy It Again, Reliable, Durable
Cons: Loud
John Recommends This Generac Product
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Dennis B.
Baltimore, MD
Purchased from Electric Generators Direct
Purchased 2/22/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Fantastic Buy!!!
For the power, ease of operation and price you can't beat this generator! After letting it run (for the first time) for 5/10 minutes I put a load consisting of, 2 side by side refrigerator/freezers, 1 chest freezer, numerous lights, a T/V, furnace, computer, along with me using a microwave.

This summer there will also be 2, 5,000 btu window A/C units and 1, 8,000 window unit, and 2, sump pumps. This generator starts right up, with either the pull string or starter and is pretty quiet... more
Dennis Recommends This Generac Product
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Free Freight
  • Ships via Semi-Truck
  • Curb Side Delivery
  • Free to Lower 48 States
  • Standard Rates to Alaska, Hawaii
We currently CANNOT ship this product to California or any destination outside of the United States
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  • Requires Special Hydraulic Lift
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Shop for the Generac 5943 - GP7500E 7500 Watt Electric Start Portable Generator at Electric Generators Direct. Research Generac 696471059434 portable generators online. Find Generac GP7500E portable generators & GP7500E features and specifications. Get the best deal; compare Generac 5943 prices now. Buy the GP7500E direct and save.