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Customer reviews for Generac GP6500 6,500W/8,125W Generator + CO-Sense for
Generac GP6500 6,500W/8,125W Generator + CO-Sense
4.6 out of 5 stars
stars1,735 ratings1,732 reviews
  1. 5 stars78% (1,357)
  2. 4 stars15% (260)
  3. 3 stars2% (41)
  4. 2 stars1% (19)
  5. 1 star3% (58)

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Showing 71-80 of 1,732 reviews
Jan 7, 2018
BK
4 out of 5 stars review

Battery charger

I have had this unit for three years now and fortunately have not needed it......yet. I do maintain it regularly and it seems to run well One question......is there a specific position that the start switch should be in when the generator is stored and the battery is charging (supposedly)..? The push start will not work any time that I try to start it....I always have to resort to the pull start. This will be hard for my wife if I am at work when we lose power.....one of the reasons I chose this unit. I store it with the battery charger plugged in as recommended but the battery never has enough to start the unit. Any help would be appreciated.

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Jul 30, 2023
Tom
1 out of 5 stars review

GP15500 EFI *DISAPPOINTED *

I purchased and received my GP15500 EFI on July 11, 2023. I purchased the unit to supply supplemental power to my home, as we experience frequent multi-day power outages due to severe weather. As of yesterday, 07/29/23, we were subject to severe weather and lost power. I fired the generator up and started supplying power to my home. The unit worked flawlessly for 10 hours, getting me through the night. Woke up this morning, 07/30/23, and shut the unit down to let it cool before refueling. Went to get more fuel and when I returned home (30 mins later) I found that the top portion of the fuel tank imploded and collapsed on itself. I am in complete disbelief. This was supposed to be a reliable piece of equipment and at $4,000.00 I expected more. Yes, the unit is covered under warranty. However, no Generac certified repair shop is open on a Sunday and I estimate not having my equipment back for several weeks, figuring new parts will have to be ordered. The unit was assembled and maintained according to the manufacturer's manual (i.e, oil level, fresh fuel, proper storage, etc.) And only has 11.2 hours of run time. I went with Generac because of their exceptional reputation but now regret my purchase, as I have a $4,000.00 paper weight and no power. I may update this review once my equipment is repaired but fear I will run into the same issue in the future. I tried to add photos but I am unable to do so.

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Apr 18, 2025
DirtCop
4 out of 5 stars review

Great alternative to bigger generators

A lot of features for the money! This unit delivers emergency power for our whole house, except for the oven and dryer. With it, freeers and refrigerators have enough amps to start their compressors, something smaller generators do not! Also, It has overheating shutdown, which is a great reliability feature. The only problem we've had so far is with the battery start. the terminals on the battery come loose way to easily. An inexpensive alternative to the permanent generators, which can easily run over $10000 installed.It is sad that we have a need for this technology, when our parents had cheap reliable energy. And it all could of been avoided.

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May 7, 2021
Chad
5 out of 5 stars review

Great emergency power for necessities

I've been very happy with this generator. I set it up as soon as I brought it home because I wanted to ensure it didn't have any issues. It started right up and produced power. I drained the fuel and put it in the garage. I use the generator box as a cover so other than a few disrespectful spiders it looks brand new. I've only had to use it twice in the two years I've owned it and both times it fired right up, as soon as I remembered to turn the power switch on. We used it to power the refrigerator, tv, satellite receiver, and a light. As expected, it had no problem powering those. As for the sound, I don't really consider it quiet. I put it about 20 ft from the house under a shelter, ran extension cables through the window, put a towel in the window to seal out airflow and some noise. We can easily hear it in the house even over the tv at normal levels. I wouldn't consider it loud but it's much louder than the small generators I've seen used for tailgating. I'm not trying to compare the two. I'm just trying to give you a frame of reference. It wouldn't keep me from buying another one if I needed it. I don't know the limits of this generator but if you want to have power available for the basics when there's an outage, I believe this will work for most people.

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Apr 24, 2025
shelleys39_3282
5 out of 5 stars review

Easy to use, powerful generator!

[This review was collected as part of a promotion.] This is a powerful generator! It is very durable and a medium size, so you can move it around if needed. Easy to use and hook up to your appliances. There is some noise but half of the noise of my neighbors generator. This is a must buy!

Review from influenster.com
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Apr 23, 2025
tdebacker_4972
5 out of 5 stars review

Built Like a Tank—Ready for Anything

[This review was collected as part of a promotion.] The Generac GP9500E is a beast. Tons of power—easily runs the essentials plus extras without breaking a sweat. The tri-fuel setup is a game changer. Whether it's gas, propane, or natural gas, it fires up quick and runs smooth. Noise-wise, it's not whisper-quiet, but for the power you're getting, it's surprisingly reasonable. You'll hear it, but it's not going to rattle your teeth. Maintenance is straightforward—keep up with oil changes and check the air filter now and then, and it'll treat you right. COsense is a solid safety feature, and the build quality feels like it could survive a small war. Or a zombie apocalypse—because let's be honest, if the world ends, you'll still have power while the neighbors are burning furniture.

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Aug 1, 2017
Blacktailmountainranch
5 out of 5 stars review

Reliability

Just finished a 10 state tour delivering HighMont Beef to the western states and the Generac XD-5000-E ran perfectly. We had it in a ventilated stock trailer and fuel consumption was minimal and performance was excellent. I do agree that noise level requires ear protection or a muffler but otherwise this generator did what I hoped it would. It ran four large freezers without fail. Thank you Generac!

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Dec 12, 2024
Victor Pitboss
5 out of 5 stars review

Outstanding Performance

I bought 3 years ago and used it this past 3 days straight with no issues. I ran 3 refrigerators, all the lights in the house, garage door openers, electric heater, coffee pot, and toaster over. Really impressed with the power output. Plus the tank is fairly big, and last a long time once topped off. Only con is that it is really loud.

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Apr 19, 2025
Anonymous
5 out of 5 stars review

Generator

[This review was collected as part of a promotion.] I'm super happy with this generator. It's very easy portability wise to move around if needed as it's on wheels. Maintenance is easy, so that's a plus. When the power goes out, this will help light up the whole house. Noise level is hardly none.

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Feb 9, 2025
MrDeetoes
5 out of 5 stars review

Reliable power.

Purchased the E7500 in 2015 during a week long power outage from a wind storm. It powered my furnace, lights, microwave, Keurig and toaster oven. It was 11 degrees F and very windy. I have used it several times since for minor projects. It starts every time with both battery and pull cord. It's on its second spark plug and battery. Love this generator.

Review from generac.com
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