Is $399.99 a good price for this generator?

It is a low price for a 4,000-watt inverter generator with a CO sensor. Comparable inverter units usually cost more, so $399.99 at Amazon as of November 5, 2026 looks like a good deal.

Can it run a 13,500 BTU RV air conditioner?

Yes. The listing rates it for loads up to 13,500 BTU, and the 30-amp RV outlet is there for that. Expect the engine to run hard and burn through the 1-gallon tank quickly.

How loud is it really?

The maker claims 59 dB, which is about normal conversation level at close range. Owners generally agree it is quiet for its output, though it gets louder under heavy load.

Does it have electric start?

No. It is recoil start only, so you pull a cord to start it. There is no battery or push-button start.

Can I connect two of them together?

Yes, the unit supports paralleling two generators to double output. You need a parallel kit, which is not included.

What comes in the box?

The generator, a funnel, tool kit and owner's manual. Oil for the engine is typically not included, so buy some before first use.

Where is the 4000 Watt Inverter Generator cheapest?

At Amazon, for $399.99, 20% under what the other stores charge, as of our latest check.

What do buyers say about the 4000 Watt Inverter Generator?

Rated 4.1 out of 5 from 210 ratings.

Where can I buy the 4000 Watt Inverter Generator?

8 stores we checked sell it, including Amazon, Home Depot, Walmart, BrandsMart USA, Tractor Supply Company.

4000 Watt Inverter Generator

4.1

Best price now

$399.99at AmazonObserved at 11:34 AM

20% under what the other stores charge

Compared across 7 stores. Prices are checked against each store and labelled with when.

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What reviewers say

4.1 / 5210 ratings

Owners rate it 4.1 out of 5 across 210 ratings. Most like the quiet running, light weight and clean power for electronics; complaints center on the small tank, pull-start effort and the CO sensor shutting it down unexpectedly.

What people mention

NoisePraisedOwners say it runs noticeably quieter than conventional open-frame generators.
WeightPraisedAt 47 lbs it is easy for one person to carry and store.
RuntimeCriticisedThe 1-gallon tank gives only about 4.5 hours at half load, so refills are frequent.
CO shutoffMixedSome owners value the safety cutoff; others say it trips in garages or under covers and kills power.
StartingCriticisedRecoil-only starting can take multiple pulls, particularly on a cold engine.
Power qualityPraisedInverter output is reported to run sensitive electronics without issues.

About the 4000 Watt Inverter Generator

Have power when you need it with this 4,000-Watt Super Quiet Gasoline Powered Inverter Generator with Recoil Start and CO Alert. It weighs just 46 lbs. so it's easy to transport and store. This is a great option for home use or in an RV. It operates at 4,000 peak watts and 3,200 running watts. The 145cc engine can run for 4.5 hours at half load. It also runs quietly so you are not disturbed. This generator runs at 59 db. The inverter technology helps ensure your electronics are safe. Meanwhile, the PGD40iSCO delivers a stable sine wave that works well for powering cell phones, laptops, and more. Another appealing feature is that you can link two units together to double your output. This gives you more power when you may need it. Added safety functions include the low oil shutdown, overload indicator and CO alert. This can help keep you, your family and friends safe while the generator is in use. This generator is a great option for camping trips, tailgating or for use as emergency backup power. With its two standard 120V 20-amp outlets and one 120V 30-amp RV outlet, you can power a variety of devices and appliances.