Genmax 1,800W Gas Generator Review
The GENMAX GM2200i is a 2200-watt gasoline inverter generator featuring a 79.7cc engine, CO detection, and parallel capability, designed for quiet and efficient power supply.
At a Glance
- Running Watts1800W
- Starting Watts2200W
- Fuel TypeGasoline
- Runtime (50%)6h
- Noise Level58 dB
- Weight41.9 lbs
Where to buy
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Is this the right generator for you?
Here's the quick tradeoff view — what this model does well, and where it may not fit.
Pros
- 79.7cc engine producing 2200 starting watts and 1800 running watts
- Fully enclosed design for reduced noise levels
- Built-in carrying handle for easy transport
- Low idle mode for fuel efficiency and reduced sound emissions
- USB port for charging mobile devices
- Parallel ready to connect two GM2200i generators for increased power
- CO Alert system that automatically shuts off the generator when unsafe carbon monoxide levels are detected
Cons
- No electric start option
- No RV outlet available
Summary
The Genmax GM2200i is a compact and efficient inverter generator designed for a variety of applications, making it an ideal choice for outdoor enthusiasts, campers, and homeowners looking for a reliable power source. With a starting wattage of 2200 watts and a running wattage of 1800 watts, this generator is capable of powering essential appliances, tools, and devices, ensuring you stay connected and comfortable in any situation.
This generator is particularly well-suited for recreational activities such as camping or tailgating, where quiet operation and portability are crucial. With a fuel tank capacity of 1 gallon, the GM2200i provides a runtime of up to 8 hours at a 25% load, making it an excellent companion for extended use. Its lightweight design and inverter technology further enhance its appeal, allowing it to deliver clean and stable power for sensitive electronics.
Power & Runtime
The Genmax GM2200i operates on gasoline, a widely available fuel type that offers convenience for users. With a starting wattage of 2200 watts and a running wattage of 1800 watts, this generator can handle a variety of household items and outdoor gear. The noise level is rated at a mere 58 decibels, which is comparable to the sound of a normal conversation, making it suitable for use in residential areas or during quiet outdoor activities.
Runtime is a key consideration for generator users, and the GM2200i excels in this area. It can run for up to 8 hours at a 25% load, which is ideal for light usage during camping trips or while powering small appliances at home. At a 50% load, the runtime decreases to 6 hours, still providing ample time for most applications. The fuel tank capacity of 1 gallon allows for these extended runtimes without frequent refueling, making it a practical choice for users who require consistent power.
The generator features a total harmonic distortion (THD) percentage of less than 3%, ensuring that it produces clean power suitable for sensitive electronics. This is particularly important for users who need to charge devices like laptops or smartphones, as it minimizes the risk of damage from power fluctuations.
Outlets
The Genmax GM2200i is designed with versatility in mind, though it does not come with a wide array of outlets. The generator includes standard outlets that are suitable for various applications. However, specific outlet specifications were not detailed in the provided data.
It is important to note that while the GM2200i is parallel capable, allowing users to connect two units for increased power output, it does not come with RV-ready outlets. This may limit its use for users looking to directly power RV appliances without additional equipment. Additionally, the generator does not have transfer switch capability, which is a consideration for homeowners looking to use it as a backup power source during outages.
Portability
Portability is one of the standout features of the Genmax GM2200i. With dimensions of 18.9 x 11.4 x 17.3 inches and a weight of just 41.9 pounds, this generator is easy to transport and store. Its compact size makes it an excellent choice for those who need a generator that can fit in tight spaces or be easily loaded into vehicles.
The design of the GM2200i includes a sturdy frame that enhances its durability while maintaining its lightweight characteristics. The generator is equipped with convenient handles, allowing for easy lifting and maneuvering. Although the data does not specify wheels, the overall design promotes ease of transport, making it suitable for users who prioritize mobility.
Features
The control panel of the Genmax GM2200i is user-friendly, featuring clearly labeled controls and indicators. The inverter technology ensures that the power output is stable and clean, making it safe for sensitive electronics. The generator also includes essential safety features, although specific details on these features were not provided.
Included accessories were not mentioned, but users can expect basic functionality without additional frills. The warranty offered is for 1 year, providing peace of mind for buyers who may have concerns about long-term reliability. Overall, the GM2200i is built with the essential features that users need for efficient operation.
Recommended Audiences
- Campers looking for a lightweight and portable power solution
- Homeowners in need of a reliable backup generator for small appliances
- DIY enthusiasts who require power for tools on job sites
- Tailgaters wanting to power small electronics and appliances
- Outdoor enthusiasts who need a quiet generator for recreational activities
- Users seeking an inverter generator for clean power for sensitive devices
- Individuals looking for a generator with a compact design for easy transport
- Those who appreciate the convenience of parallel capability for increased wattage
Score Breakdown
- Inverter+1
- Parallel Capable+0.4
- Watts/$
- Surge/$
- Runtime/$
- Warranty
- THD (lower=better)
- Build Quality
- Noise (lower=better)
- Portability
- Outlet Variety
- Feature Points
What this generator can power
At a Glance
- Continuous:1,800W(recommended usable: 1,440W)
- Surge:2,200W
- Output:120V only
- Inverter:Yes (clean power for electronics)
Big-item compatibility
Needs 240V output
Needs 240V output
Needs 240V output
Needs 240V output
Exceeds capacity
Example setups
Essentials
- Lights + Wi-Fi + Charging
- Refrigerator
- Furnace Blower
Est. running: 1,000W
Peak surge (single motor): 1,200W
Avoid starting multiple motor loads at the same time.
Essentials + Comfort
- Lights + Wi-Fi + Charging
- Refrigerator
- TV + Entertainment System
- Furnace Blower
Est. running: 1,300W
Peak surge (single motor): 1,200W
Avoid starting multiple motor loads at the same time.
Jobsite / Tools
- Lights + Wi-Fi + Charging
Est. running: 200W
These are estimates using typical wattage assumptions. Real appliances vary. Startup surges can be 2–6× the running wattage for motor-driven loads. 240V loads require a 120/240V generator and proper connection. Use a transfer switch or interlock kit; never backfeed a panel.
About Genmax
Genmax is a generator manufacturer known for innovation, quality, and a diverse range of portable and standby generators.
Warranty
Power by fuel
| Fuel | Running | Starting | Runtime @50% | Runtime @25% |
|---|---|---|---|---|
| Gasoline | 1800W | 2200W | 6h | 8h |
Full Specifications
Power
| Running Watts | 1,800 watts |
|---|---|
| Starting Watts | 2,200 watts |
| Starting Watts (Gasoline) | 2,200 W |
| Running Watts (Gasoline) | 1,800 W |
Engine
| Engine | 79.7 cc Dinking OHV 4-stroke |
|---|---|
| Engine Type | Dinking OHV 4-stroke |
| Engine Displacement | 79.7 cc |
| Engine Oil | 10W-30 |
| Engine Oil Capacity | 0.1 Qt |
| Spark Arrestor | Yes |
| Emissions Compliance | EPA, ANSI/PGMA G300-2023 |
Electrical
| Voltage (AC) | 120 |
|---|---|
| Voltage (DC) | 5 |
| Phase | Single |
| Running Amps | 15 A |
| Peak Amps | 18.3 A |
| AC Frequency | 60 hz |
| Current | 15 amps |
| GFCI Outlets | No |
| USB Outlets | 2x 5V USB port (USB-A) |
| DC Outlets | 2x 5V USB port (USB-A) |
| AC Outlets | 1x Duplex 120V 20A (5-20R) |
| Total Harmonic Distortion (THD) | <3% % |
Dimensions
| Dimensions | 18.9 x 11.4 x 17.3 inches |
|---|---|
| Weight | 41.9 lbs |
Other
| Automatic Low Oil Shutdown | Yes |
|---|---|
| Emissions Compliance | EPA, ANSI/PGMA G300-2023 |
| Automatic Voltage Regulation | Yes |
| Automatic Voltage Regulator | Yes |
| Carbon Monoxide Sensor | Yes |
| Covered Outlets | Yes |
| Electric Start | No |
| Fuel Gauge | No |
| Fuel Tank Capacity | 1 gallons |
| Included Accessories | Funnel and tool kit |
| Indicators | Yes |
| Inverter | Yes |
| Noise Level | 58 dBA |
| Overload Protection | Low oil and overload protection, CO monitoring |
| Parallel Capable | Yes |
| Recoil Start | Yes |
| Remote Start | No |
| RV Ready | No |
| Starter Type | Recoil |
| Starting System | Recoil |
| UPC | 738,349,925,141 |
| Warranty | 1 years |
| Wheels | No |
Core
| Fuel Type | Gasoline |
|---|
Runtime
| Runtime @ 25% | 8 hours |
|---|---|
| Runtime @ 50% | 6 hours |
| Runtime @ 25% Load (Gasoline) | 8 hours |
| Runtime @ 50% Load (Gasoline) | 6 hours |
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