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Generac 5943 - GP7500E 7500 Watt Electric Start Portable Generator

Generac Electric Generators and AccessoriesModel: 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
344 Reviews
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  • Features
  • Specs
  • 16
  • 344
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  • Accessories

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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  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 manufacturer’s 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 475–536 °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 920-1020°F and Natural Gas (NG) has an Ignition Point of 900–1500°F. 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: I’m 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. I’d like to power as much of the house as possible to continue “normal life” as much as reasonable. I understand I won’t be able to power the central A/C. Instead I’ll have an 8000 BTU portable A/C unit I’d like to power (about 1100 watts).

So, in general, the main things I’d 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

I’d 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 don’t 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 I’m 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 (62)
Price (44)
High Quality (40)
I'd Buy It Again (29)
Easy To Store (27)
Heavy (18)
Unreliable (5)
Expensive (4)
Loud (4)
Bad Instructions (3)
96% of respondents would recommend this product to a friend
344 Reviews  Sort by 
Jared, the Portable Generator Expert
Electric Generator Expert

Product Expert
Total Reviews
103 Reviews
Total Helpful Votes
8924 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
Was this review helpful?
Christopher W.
Lake Zurich, IL
Purchased from Electric Generators Direct
Purchased 12/29/15
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Just Fine
The 7500E is exactly what I expected from Generac. I've installed many whole house units and have had only minor issues with one.

I've heard some here complain about the noise, but its fine, power doesn't happen silently, and it was never one of my concerns from the beginning. We're not living on it after all. It makes some noise and delivers the power I need.
Christopher Recommends This Generac Product
Was this review helpful?
Bob C.
Colchester, CT
Most Helpful Critical Review
3 out of 53 out of 53 out of 53 out of 53 out of 5
Some Have Bad Luck
Having purchased the 7500 watt model & wiring in a gen/tran switch, I thought I was all set for whatever superstorm "Sandy" could dish out.....First night w/out power it ran for (4) hours BUT had to manually raise idle to power house as it wouldn't step up on its own....the next morning I fired it up,ran for a minute or so & shut down...Thought perhaps too much choke? Re-started and ran for another minute or so and stopped had SEIZED.

Authorized dealer took it in... more
Bob Recommends This Generac Product
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Paul D.
Murrells Inlet, SC
Purchased from Electric Generators Direct
Purchased 10/12/16
Total Reviews
2 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
I Could Not Be More Happier With My Generac 7500
It started the second I pushed the start button and purred like a kitten.
Pros: Easy To Use, High Quality, I'd Buy It Again, Reliable
Cons: Bad Instructions, Instructions were difficult and lacking.
Paul Recommends This Generac Product
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David C.
Seaford, VA
Purchased from Electric Generators Direct
Purchased 10/5/16
Total Reviews
3 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
Performed Flawlessly
Purchased this generator before the last storm. It arrived two days before the storm hit. The assembly was a breeze and it started right up for me and ran for nearly 24 hours straight. Thanks PED for a great product at a great price.
Pros: Easy To Use, Price, I'd Buy It Again, Reliable
Cons: Loud
David Recommends This Generac Product
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Darren M.
Larose, LA
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?
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?
Purchased from Electric Generators Direct
Purchased 12/1/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
Generac 5943
Well we finally broke down and bought a generator about a month ago. We could have used it several times over the last 3 or 4 years (as my wife reminds me ). We haven't had an outage yet, but the unit was easy to set up, and started right up during our initial test. It powered the house with ease. The Generac came highly recommended by our electrician, as well as, by others. It has plenty of power for our needs and appears to be very well constructed and of good quality. I still hope we never... more
Dave Recommends This Generac Product
Manufacturer Response
Brand Rep
We are pleased to know that our product will be there for you when it's needed! Thank you for providing us with your positive feedback. If you haven't done so already, be sure to register your unit to initiate your product's warranty via the following link: . If you have any questions about your warranty policy, please do not hesitate to contact us directly at 888-GENERAC (436-3722) with the serial number of your personal unit.
Was this review helpful?
James B.
Independence, MO
Purchased from Electric Generators Direct
Purchased 1/25/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Happy In Missouri
It came quickly, and driver fork lifted it straight into my garage. I had it assembled in less than 30 minutes. I followed the directions and it started right up. The electric start is very nice. I had an electrician wire my box so that I can plug in from the outside. No more extension cords running through the house. We tested it and it worked great but we have not lost power to give it a real test.
James Recommends This Generac Product
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Greg H.
Plainwell, MI
Purchased from Electric Generators Direct
Purchased 1/21/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Service
The product came very fast great price. Delivered right to my door. Driver even wheeled it into my garage from the street.
Greg Recommends This Generac Product
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William C.
Wanatah, IN
Purchased from Electric Generators Direct
Purchased 12/30/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
Powerful & Easy To Run
Easy to move around and start ,and great price ! Runs furnace and other electrical appliance that are necessary when the power goes out . Safe and secure feeling . Great for working on job sites .
William Recommends This Generac Product
Manufacturer Response
Brand Rep
Thank you for providing us with your review of the GP7500E. We are pleased to learn of your positive experience with our product! Be sure to also register with Generac Nation for warranty-related information and product updates. For your convenience, the registration process can be completed online via the following link: . If you have any questions about your product's warranty or the registration process, feel free to give us a call at 888-GENERAC (436-3722); we are available 24/7. Again, we thank you for providing us with your thoughtful feedback.
Was this review helpful?
Donald Y.
Morganfield, KY
Purchased from Electric Generators Direct
Purchased 9/7/16
Total Reviews
2 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
Got To Know It, Got To Love It
I bought a Generac 7500W electric start primarily to use outdoors for electric tools where there was no electricity. (And for backup when ice-storms hit as they did in 2009).

I tried it to run a brick cutting saw and it kept kicking off. Then I tried it with my table saw and it wouldn't run. Nothing I plugged in would run. I finally figured out that the CB was blown on the main circuit.

Now everything I plug in runs fine. I like it.
Pros: Price, High Quality, Easy To Store, I'd Buy It Again
Cons: Bad Instructions, This Unit Needs Better User Instructions
Donald Recommends This Generac Product
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We currently CANNOT ship this product to California or any destination outside of the United States
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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.