AMERISUN Portable Inverter Generator 4500W, Gas Powered, CO-Sensor, Lightweight & Quiet for Home Use and Emergency Backup, Camping, EPA Compliant
Condition: Used - Like New
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 1 left in stock, order soon!
Arrives
Sunday, Jun 7
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Output wattage: 4500
Set name: Open Frame Generator
Features
- HIGH POWER OUTPUT: With a starting wattage of 4500W and a rated wattage of 3600W, this generator provides ample power for your home, RV, or job site needs
- EXTEND RUNTIME: Equipped with a 1.6-gallon fuel tank, it offers an impressive 5.1 hours of runtime at 50% load, ensuring long-lasting performance without frequent refueling
- SUPER QUIET OPERATION: Operating at a sound pressure level of 76dB(A) at 23 feet, this generator is designed to be quiet, making it ideal for use in residential areas or during camping trips
- DURABLE & PORTABLE: Weighing 61.29 lbs and featuring a compact design (19.3 x 16.9 x 16.5 inches), this generator is easy to transport and store, perfect for on-the-go power needs
- SAFETY FEATURES: Powered by an EPA Compliant 223cc 4-stroke gas engines and includes multiple safety warnings and features such as carbon monoxide detection, low oil level shutdown, and overload protection, ensuring safe and reliable operation
Brand: AMERISUN
Wattage: 4500 watts
Fuel Type: Gasoline
Power Source: Fuel Powered
Recommended Uses For Product: Residential
Voltage: 120 Volts
Output Wattage: 4500
Special Feature: CO Sensor, Fuel Efficient, Super Quiet
Included Components: AM5040 Genertor
Color: Red & Black
Wattage: 4500 watts
Fuel Type: Gasoline
Power Source: Fuel Powered
Recommended Uses For Product: Residential
Voltage: 120 Volts
Output Wattage: 4500
Additional Features: CO Sensor, Fuel Efficient, Super Quiet
Engine Type: 4 Stroke
Ignition System Type: electric start
Tank Volume: 2.7 Gallons
Engine Displacement: 223 Cubic Centimeters
Total Power Outlets: 3
Starting Wattage: 4500 Watts
Running Wattage: 3600 Watts
Runtime: 11 hours
Color: Red & Black
Brand Name: AMERISUN
Included Components: AM5040 Genertor
Model Name: AM5040
Model Number: AM5040
UPC: 840432707241
Manufacturer: Amerisun Inc.
Manufacturer Part Number: YJ-AM5040C-02
Item Type Name: portable generator
Warranty Description: 2 Year Warranty
Item Dimensions L x W x H: 19"L x 16"W x 16"H
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Jun 7
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Output wattage: 2500
Set name: Super Quite Small Generator
Quiet! I purchased it to run our RV while we boondocked a couple days on the beach. It worked great! Ran our mini-split with no issues to provide some heat at night and AC during the day. We would shut off the HVAC to run the toaster, microwave and coffee pot so we didn’t overload it. The size and weight along with how quiet it is was worth the work arounds. It ran 12 hours on one tank when the temperatures didn’t require a lot of heat or cooling. Ran 8 hours on the night that the mini-split ran a lot. I can carry it with one hand so I use it to run power tools and lights instead of dragging out an extension cord at home. Our previous generator had more power but was a beast to move around. Performance seemed to really improved and smooth out after running under a load by the 5th tank of gas. Most new engines these days say there is “no break in” time but I felt like this one really ran best after a few tanks of gas.
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Reviewed in the United States on April 11, 2026 Reviewed in the United States on April 11, 2026 by deanna brown
Output wattage: 2500
Set name: Small Gas Generator-CO
I bought this based on the comments and research. I'm in Jamaica, we just had Hurricane Melissa, so no electricity and no water. I closed my eyes, said a prayer and bought this inverter generator on faith. I HAVE NO REGRETS!!!! I followed all instructions and each time I use it, it starts on one pull. I was able to connect it to my breaker, I was able to power all 8 of my emergency light bulbs, 2 door fridge, washing machine, 55 inch TV, PS5, 2 Fans all CPAP Machine all at the sametime. I had no surges, nor decrease in power, especially when the washing machine was on. What I was impressed with most of all, was the 1 gallon tank I would use an entire 6 litre bottle of 90 octane gas and that would give me little over 11 hours, with everything connected and operating, including doing 2 large loads of laundry. This Amerisun Inverter generator is the real deal, its really quiet and gets quieter with the eco mode switched on. Its very light, compact, lasts unexpectedly long for a 1 gallon tank capacity. Very powerful for its size, very mobile, I made a great investment with this inverter generator, because Jamaica is Hurricane prone and we have power outages every now and then, so its a win win situation. I recommend this to everyone, whether your a camper, tradesman, having a disaster, you will never regret it. Its worth every penny and its extremely affordable compared to others it maybe the cheapest.
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Reviewed in the United States on December 7, 2025 by Andy McMahon
Output wattage: 2500
Set name: Small Gas Generator-CO
Better than I expected. Ships without oil so you must add before starting. So add oil. Remove two screws and pull cover from side. 10w30. full synthetic, Even includes a funnel shaped to make adding oil easy. Awesome. Added fuel. Has a fuel gauge on top. Even more Awesome. Followed the tag instructions. Turn on vent on gas cap. Starting on the side. First time starting it took quite a few pulls with choke on. After the initial start, it is super easy. It is considered loud compared to more expensive models, and yet, I believe it is very quiet. More quiet than I had planned. Has USB outlets. Eco mode which lets it idle when nothing is pulling power. I ran an old air compressor with it and then plugged in an electric heater. Both ran with no issues. The nicest thing is how easy it is to tote around. My old compressor was on wheels and a nightmare just to move around. Including video of my wife starting. Hopefully you can hear how quiet it is and see how easy it is to start. She had no issues. My only regret is I got it on sale and now I wish I had bought two. I will update if I run into any problems and how it performs in an emergency over a long period. Really happy with this purchase.
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Reviewed in the United States on April 2, 2026 by Christopher Sharpe
Output wattage: 2500
Set name: Small Gas Generator-CO
This generator is easy to use, runs flawlessly and is SUPER QUIET!!! I’m grateful to have purchased this rather than a more expensive version. Fantastic generator that makes much less noise than a blower or mower.
Reviewed in the United States on April 8, 2026 by Vic
Output wattage: 2500
Set name: Small Gas Generator-CO
Works very good. Kind of a cold starter but starts on first or second pull after it has been running for a few minutes. Very quiet. I get about 10 to 11 hours running at under 25% I'm very happy with the purchase.
Reviewed in the United States on April 20, 2026 by Captn Stabn
Output wattage: 2500
Set name: Small Gas Generator-CO
This inverter generator seems to be a quality product. Fit and finish are great. Took 5 or 6 pulls to start the first time. After that it has started the first pull. Display / control panel is functional and laid out nicely. I have only had it a few days and started it about 3 times. It is much quieter than the older model generators. Having to remove the side cover to check the oil is an inconvenience but not a deal breaker. You have to remove 2 screws and pull the cover off. Getting the cover back on and lined up to tighten the screws has been somewhat frustrating. There is also a panel for access to the spark plug. It is light to carry but could seem heavy for someone with bad back or up in years. Over all I'm happy with it. One thing I want to call out is: it stated on Amazon that it was made in America but it says on the box that's it's made in China. Not cool.
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Reviewed in the United States on April 13, 2026 by C. Waters
Output wattage: 2500
Set name: Super Quite Small Generator
It's not unusual where I live to have power outages several times a year - occasionally for days. I have a generator in my barn that powers barn, shop, and home when needed. But I wanted a small portable for just my outdoor boiler to avoid the gymnastics to back feed entire property when power is out and when I expect the outage will be brief. I used the Amerisun for first time a week ago during a four hour outage to keep boiler circulating pump operating. It was satisfying not to have to worry about boiling off antifreeze and thus the five star rating. The generator starts easily, is quiet, and seems to be of good quality. And the price was great.
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Reviewed in the United States on March 7, 2026 by ral
Output wattage: 2500
Set name: Small Gas Generator-CO
Have used 5 times, basically to charge my electric battery power stations. It runs smooth and much wuieter than my regular generator, also produces clean energy required fir sensjtive electronics. It is light and starts on 1st or sscond pull. So far si good.
Reviewed in the United States on April 13, 2026 by John