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Model #8251

Starting At

$679.00 MSRP Where To Buy

GP2500i 2500-Watt Portable Inverter Generator with COSENSE® Technology 

2200 Running Watts / 2500 Starting Watts Portable Inverter Generator  

The GP2500i inverter generator provides outdoor enthusiasts with a portable power solution designed for a variety of open-air festivities. From weekends in the woods to outdoor cookouts and get-togethers, these models provide the stable power you need without disturbing neighbors or surrounding wildlife.  

Using TruePower™ Technology, the GP2500i produces the clean power required by a variety of sensitive electronics, tools and appliances. Compact and fully-enclosed, its lightweight design makes transportation easy, and its Economy mode feature also reduces fuel consumption rates and noise emissions to operate quietly for extended periods of time.   

Whether you’re tailgating for the big game or simply want to enhance your campsite experience without disrupting the environment around you, Generac’s GP2500i inverter generator is right for you.  

Quiet and neighbor friendly, fully enclosed design dramatically reduces noise levels 

TruePowerTM Technology provides clean, stable power ideal for sensitive electronics, tools and appliances  

COsense® Technology: STOPS. ALERTS. SAVES. Powerful protection against hazardous carbon monoxide.

Compact and lightweight makes transportation easy with built-in handle   

Economy Mode automatically adjusts engine speeds to save fuel and reduce sound emissions  

Integrated Off/Run/Choke Knobsimplifies startup procedures  

LED Indicators alert you when unit is low on oil, overloaded or ready-to-use  

USB ports to charge mobile devices  

Parallel Ready allows you to connect two GP2500i inverter generators for twice the power   

Low-Oil Pressure Shutdown – Automatically safeguards engine from damage 

Covered outlets provide added protection from the environment   

<strong>GP2500i 2500-Watt Portable Inverter Generator with COSENSE® Technology  </strong>


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Rated 5 out of 5 by from You get what is advertised I decided that going without electricity and having the basement flood after the last hurricane was more stress than I wanted in my life. I did a lot searching on the internet for a generator that would give me the best peace of mind. I settled on the Generac 5940 GP6500- 6500 Watt Portable Generator (5940). I paid for the tail gate service and it was delivered very promptly and wheeled up to my house. Assembly was extremely easy. I put oil and gas in it as directed, and with one pull it was running. A few weeks later I had the "Transfer Switch" installed and we killed all power to the house, started the generator, and flipped the transfer switch to the operating position. Everything we had connected (which was just about everything except central air conditioning) was powered on. We even ran water until our well pump turned on and the generator never even hesitated or appeared to be under strain. So if we ever lose electricity again, especially for a long duration of time, the neighbors will see that we have heat, water, and lights. They will all be welcome! Thanks Generac for supplying a product that truly is what is advertised. In today's world it is nice to see some honesty in advertising.
Date published: 2011-11-23
Rated 1 out of 5 by from This product sucks I bought Generac 6500 on November 1 and right side outlets failed to function after 24 hours of use. Tech at Generac said unit had to go to warantee repair vendor for diagnosis and repair which is hard to find in my area. So I have to load 200 lb machine and haul 30 miles and pay $45 diagnostic fee with warranted. Should have bought a Honda.
Date published: 2023-11-10
Rated 5 out of 5 by from Very quiet and portable Runs everything I need it to- AC in the RV, Power tools when off grid and it’s light enough for this old geezer to pack around. Also so quiet that I can hardly hear it running from 35 feet away. Will be handy to run the freezer or whatever if the power goes out .
Date published: 2023-10-30
Rated 5 out of 5 by from Great for backup power during hurricanes and other outages We live in a rural area in south Georgia and lost power for 5 days during hurricane Idalia. A good friend loaned me his GP6500 once his power was restored and it saved us from loosing food in our refrigerator and freezer plus we were able to run our well and water heater. I was sold and purchased our own GP6500 the next week. He has owned his since before hurricane Irma and purchased it for the same reason.
Date published: 2023-10-25
Rated 4 out of 5 by from Not properly rated Viewing the schematic, all power, both 240v and 120v goes through one 30 amp breaker. 30 amps time 240 volts is 7200 watts with no more capacity for the 120v outlets. How can you rate this generator at 9200 watts when you can only use 7200 watts?
Date published: 2023-10-19
Rated 5 out of 5 by from Electric start works like a charm. The ease of the electric start makes this perfect for those older users. It’s a joy to use.
Date published: 2023-10-07
Rated 5 out of 5 by from This is gonna be great for powering my whole home I purchased a 6500 unit after hurricane Ibella. I was pleased with the performance. I have now bought the 18000 unit for powering my whole home in case of another disaster comes my way.
Date published: 2023-09-30
Rated 1 out of 5 by from This product failed out of the box First let me state how poorly the assembly instructions are done. Diagrams way to small and lack details. Once assembled, started immediately but made a very high pitch sound to point I shut things down. Was unable to restart despite numerous attempts. The customer service is also lacking. Way too long to be on hold for such poor service. Operators lack detailed product info and sympathy for what customer is having to deal with since you don’t have a good process for warranty work. Too much work required by customer to right the situation. I have to spend time and effort to correct a bad situation due to faulty equipment. Poor response. I will never buy another Generac. And I dare folks to publish this review.
Date published: 2023-09-15
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GP2500i - 8251 is rated 4.6 out of 5 by 1607.
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The Power to Live. Work. Play.

Portable generators are a welcome addition to many activities at home, at work, and away. In an emergency, portable generators can provide critical backup power. They make camping and tailgating more comfortable. And contractors appreciate the flexibility portable power brings to the jobsite.