GENMAX GM2000i inverter generatorCheck best price → All photos, customer reviews and today's price →
Easy to carry · Gas inverter · 1,600 W

GENMAX GM2000i review: our full analysis

Brand: GENMAX · Ranked 125th of 174 · Our methodology

6.5/10 Power4.3 Runtime7.0 Noise8.9 Features6.3 Portability7.4 Watts per dollar6.4 Dotted line: average of the 174 models. Relative scores based on specs, no hands-on testing. Where to buy Today's best priceTypical price: $300–$500 Check best price Affiliate link: As an Amazon Associate we earn from qualifying purchases.
Key takeaways. The GENMAX GM2000i is a gas inverter generator rated at 1,600 running watts and 2,000 starting watts, built for camping, tailgating and small jobs away from an outlet. It weighs 34.2 lb, is rated at 58 dB(A) and runs about 8 hr at half load on a tank. Notable features: a CO shutoff sensor.

Not clearly published by the manufacturer, take with caution: fuel tank, runtime.

Pros

  • 1,600 running watts at 58 dB(A) at 23 ft and 25% load.
  • 34.2 lb, with 10 hours of runtime at 25% load.
  • Parallel-capable, with CO shutdown and dual USB ports.

Cons

  • One 5-20R duplex and no 30 A RV outlet.
  • Not CARB compliant.
  • Recoil start only.

Best for

  • Camping, tailgating and small jobs away from an outlet
  • Places where noise matters: campgrounds, close neighbors

Specifications

TypeGas inverter (inverter: clean power)
Running watts1,600 W gasoline
Starting watts2,000 W gasoline
FuelGasoline
Fuel tank1.2 gal
Runtime10 hours at 25% load · 8 hr at 50% load
Noise58 dB(A) (manufacturer figure)
Weight34.2 lb
Outlets2 × 120 V household outlets (5-20R) · USB ports
Transfer switch readyNo (no 240 V outlet)
StartRecoil (pull start)
CO shutoff sensorYes
Parallel capableYes
EmissionsEPA compliant
Engine80 cc
Warranty3 years
GENMAX GM2000i1,600 running W · Gas inverter · typical price $300–$500 Check price and availability

Who is it for?

The GENMAX GM2000i is mostly suited to:

  • Camping, tailgating and small jobs away from an outlet.
  • Places where noise matters: campgrounds, close neighbors.
1

What will a 2,000-watt generator run?

The GENMAX GM2000i delivers 1,600 W continuously and up to 2,000 W for a few seconds to start motors. It handles 6 of the 14 loads on our typical list one at a time; add up the running watts of everything you run together, plus the extra starting watts of the biggest motor. As an inverter, it produces clean power suited to laptops, TVs and furnace control boards.

ApplianceRunning / starting wattsWill it run?
Wi-Fi router and modem20 W / 20 W✅ Yes
CPAP (no humidifier)50 W / 50 W✅ Yes
Laptop or TV150 W / 150 W✅ Yes
Full-size refrigerator700 W / 2,200 W❌ No
Chest freezer500 W / 1,500 W✅ Yes
Furnace blower (1/2 HP)800 W / 2,350 W❌ No
Sump pump (1/2 HP)1,050 W / 2,150 W❌ No
Microwave (1,000 W)1,000 W / 1,000 W✅ Yes
Space heater1,500 W / 1,500 W✅ Yes
Window AC (10,000 BTU)1,200 W / 3,600 W❌ No
RV roof AC (13,500 BTU)1,800 W / 2,800 W❌ No
Circular saw1,400 W / 2,300 W❌ No
Well pump (1 HP, 240 V)1,000 W / 4,000 W❌ Needs 240 V
Central AC (3-ton, soft start)3,800 W / 5,500 W❌ Needs 240 V

Typical figures; check the label of your own appliances. One load at a time: add up everything you run together.

GENMAX GM2000i1,600 running W · Gas inverter · typical price $300–$500 Check best price
2

Runtime and fuel

The fuel tank holds 1.2 gallons of gasoline. The manufacturer quotes 10 hours at a quarter load. At half load, it runs about 8 hr on a full tank. That is about 0.15 gallon per hour at half load, or 4 gallons for a full day of running, so plan your fuel storage for a multi-day outage.

Fuel tank1.2 galgasoline
At 25% load10 hoursmanufacturer figure
At 50% load8 hrmanufacturer figure
Fuel per day≈ 4 gal24 h at half load
3

58 dB(A): how loud is it?

The manufacturer rates the GENMAX GM2000i at 58 dB(A), usually measured at 23 feet (7 m) and a light load. That is quieter than a normal conversation: suitable for campgrounds and close neighbors.

4

Outlets and home connection

Its panel offers 2 × 120 V household outlets (5-20R), USB ports. It has no 240 V outlet: it runs plug-in appliances through extension cords, not hardwired circuits or a 240 V well pump. It is parallel capable: linked to a second compatible unit with a parallel kit, the two outputs combine.

5

Start type, CO shutoff and warranty

It starts with a recoil (pull) cord. A CO shutoff sensor stops the engine if carbon monoxide builds up around it; it does not replace distance (20 feet from the house) and CO alarms indoors. It is listed as EPA compliant; check California availability if you live there. The warranty runs 3 years (residential use).

6

Typical price $300–$500: good value per watt?

Relative to its running watts, the GENMAX GM2000i scores 6.4/10 on value: an average result. Inverters always cost more per watt than open frames: compare it with other inverters. Generator prices on Amazon move a lot, especially before hurricane season: check the current price before you buy.

GENMAX GM2000i1,600 running W · Gas inverter · typical price $300–$500 Check best price

Our verdict on the GENMAX GM2000i

The GENMAX GM2000i scores 6.5/10 and ranks 125th out of 174 generators analyzed. Its strengths: 1,600 running watts at 58 dB(A) at 23 ft and 25% load; 34.2 lb, with 10 hours of runtime at 25% load. It is best suited to camping, tailgating and small jobs away from an outlet and places where noise matters: campgrounds, close neighbors.

GENMAX GM2000i1,600 running W · Gas inverter · typical price $300–$500 Check best price

Featured in our rankings

Best inverter generators77th of 120Best quiet generator27th of 46Best generator for camping25th of 61Best lightweight portable generator20th of 55Best generator with a CO shutoff sensor98th of 129Best parallel capable inverter generator59th of 98Best 2000 watt generator2nd of 24Best generator under $50030th of 54Best generator under $1,00073rd of 111Best generator under $1,50099th of 142

Sources

Frequently asked questions

Will the GENMAX GM2000i run a refrigerator?

Not reliably: a full-size fridge can need about 2,200 W for a moment when the compressor starts.

Can the GENMAX GM2000i power a house?

Only plug-in appliances through extension cords: it has no 240 V outlet for a transfer switch.

How long does the GENMAX GM2000i run on a tank?

About 8 hr at half load according to the manufacturer, and 10 hours at a quarter load.

Does the GENMAX GM2000i run on propane?

No, it runs on gasoline only.

Is the GENMAX GM2000i quiet?

The manufacturer rates it at 58 dB(A), quiet enough for most campgrounds.

GENMAX GM2000i1,600 running W · Gas inverter · typical price $300–$500 Check best price

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