4000W Inverter Generator with CO Sensor NV4000iS

Lightweight and whisper quiet operation for power you can easily take on the go. Powered by a 158cc easy-starting OHV engine this inverter will run up to 7 hours on one tank of gas. This inverter can be connected to a second inverter generator using a parallel kit (not included) to double your power output.

  • 4125 starting watts, 3300 running watts and runs for up to 7 hours on a 1.8 gal. gas tank.
  • 58lbs generator with wheels and foldable handle, easy to carry for outdoor & home use
  • 65.7 dBA at 23 feet is perfect for camping, tailgating, or backing up a few home essentials.
  • CO sense technology provides protection against hazardous carbon monoxide.
  • Offers triple protection with LED indicators for low oil shutdown, overload, and CO warning.
  • Connect two inverter generators using a parallel kit (not included) to double your power output.
  • Two year limited warranty with free lifetime technical support from dedicated experts.

599.99

Where To Buy:

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NV4000iS Inverter Generator FAQ

A:Your safety is our priority. This generator is equipped with advanced Carbon Monoxide Shutdown Technology. If the built-in sensor detects a dangerous buildup of CO gas—a risk in enclosed or partially enclosed spaces—the system will automatically shut the generator off. This crucial feature provides peace of mind when using the generator for camping, RV trips, or as a home backup power source.

A: Absolutely. It delivers 3300 running watts (4125starting watts), perfect for charging devices, running small appliances, or powering lights. More importantly, it operates as quietly as 65.7  dBA from 23 feet away—quieter than a normal conversation. This combination of reliable power and ultra-low noise ensures it won’t disturb your outdoor experience.

A: Yes. With 3300 running watts and a dedicated 30A RV outlet (L5-30R), it’s ideal for powering your RV’s systems or crucial home devices like refrigerators, fans, and lights. The Smart Power Panel includes two AC outlets and two USB ports for maximum versatility. For extended runtime, the Economy Mode allows it to run for up to 7 hours on just 1.8 gallons of gas.

A：This generator is Parallel Ready. This means you can easily connect a second compatible Novus generator using a parallel kit (sold separately) to double your power output and runtime. This gives you the flexibility to start with one unit and expand your power capacity later for larger jobs or more demanding applications.

A：The Smart Power Panel’s LED indicators offer triple protection by alerting you to three key conditions: Low Oil (auto-shutdown to protect the engine), Overload (protects your plugged-in devices), and CO Warning (critical safety alert). The Economy Mode optimizes fuel efficiency by automatically adjusting the engine speed to match the power demand, saving you money on gas and reducing noise.

Inverter Generator Specifications

ModelNV4000iS
Generator TypeInverter
Running Wattage3300 Watts
Starting Wattage4125 Watts
Rated VoltageAC: 120 V
DC: 5 V
Rated AmperageAC: 27.5 A
DC: 2.1 A/1.0 A
Frequency60 Hz
PhaseSingle
Grounding TypeNeutral Floating
Operating AltitudeUnder 6562 ft.
Rated Run Time (max)7 hours @ 25% load
Weight58 lb.
DimensionsLength: 21.5″
Width: 12.8″
Height: 20.9″

Engine Specifications

Engine ModelWM164Fi/P
Engine Displacement158 cc
Engine Type4-Stroke, Air Cooled, Overhead Valve (OHV)
Fuel TypeFresh, clean regular unleaded gasoline with a minimum octane rating of 87 and ethanol content of no more than 10% by volume.
Fuel Capacity1.8 gal. (4.5L)
Spark PlugE6RTC – Torch
Spark Plug Gap0.028-0.031 in (0.7-0.8mm)
Oil TypeSAE 10W-30
Oil Capacity17 fl.oz
NV4000iS Operator’s Manual-2026Download
NV4000iS Quick Start Guide-2025Download

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